94420 + Interview Questions in Chemistry in Class 12

1.	Statement 1 : Entropy of solution is less than entropy of pure solvent. Statement 2 : The freezing point of water is depressed by the addition of glucose.
Answer» Statement 1 is true, statement 2 is true, statement 2 is a correct explanation for statement 1 Statement 1 is true, statement 2 is true , statement 2 is not a correct explanation for statement 1 Statement 1 is true, statement 2 is false Statement 1 is false, statement 2 is true Solution :`Delta T_(f)=mK_(f)i` ENTROPY of solution is GREATER than entropy of solvent due to PRESENCES of greatere number of particles in solution.

Discussion

2.	Statement-1 : Electrons releasing group at para position of a migrating aryl group enhances. The rate of reaction in Hofmann's preparation of primary amine from amides. Statement-2:
Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION for Statement-1 Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1 Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Solution :NA

Discussion

3.	Statement-1 : Energy is released in the nuclear fusion of hydrogen nuclei to form helium nuclei Because Statement-2 : Binding energy per nucleon of helium greater than hydrogen.
Answer» STATEMENT-1 is TRUE, Statement-2 is TURE, statement-2 is a correct explanation for statement -1 Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1 Statement-1 is ture, statement-2 is FALSE Statement-2 is false, statement-2 is true Answer :a

Discussion

4.	Statement-1 : Electronegativity of an element depends on ionisation energy of that element. Statement-2 : Electroegativity regularly decreases along the group. Statement-3 : Fluorine is the most electronegative element.
Answer» T F T T T T F T T F F T Answer :B

Discussion

5.	Statement - 1 : Durning the reduction of ZnO to Zn, C is more efficient than CO. And Statement - 2 : The standard free energy of formation of CO_(2) from CO is always higher than that of ZnO.
Answer» Statement - 1 is TRUE, Statement - 2 is True, Statement - 2 is correct explanation for statement - 1. Statement - 1 is true, Statement - 2 is true, Statement - 2 is not a correct explanation for statement - 1 Statement - 1 is true, Statement - 2 is false. Statement - 1 is false, Statement - 2 is true ANSWER :A

Discussion

6.	Statement 1: During the electrolysis of water,two faraday of charge will produce a total of 336 litre of gases at S.T.P. at electrodes. Statement 2: Two faraday of charge will produce half mole of H_(2) and one fourth mole of O_(2) gas.
Answer» Statement 1 is true, statement 2 is true, statement 2 is a correct explanation for statement 1 Statement 1 is true, statement 2 is true, statement 2 is not a correct explanation for statement 1 Statement 1 is true, statement 2 is FALSE statement 1 is false,statement 2 is true Solution :2 faraday charge will RELEASE 22.4 LITRE `H_(2) an 11.2` litre `O_(2)` at S.T.P. during the electrolysis of water. `V_(EQ)(H_(2))=11.2L` at S.T.P. `V_(eq)(O_(2))=5.6L` at S.T.P. Total volume liberated by 2 faraday cahrge `=2xx11.2+2xx5.6` `=33.6L ` at S.T.P.

Discussion

7.	Statement-1: Electrolysis of an aqueous solution fo KI gives I_(2) at the anode but that of KF gives O_(2) at the anode and not F_(2). Statement-2: F_(2) is more reactive than I_(2).
Answer» Statement-1 is True, statement-2 is true, statement-2 is a correct explanation of statement-1 Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation of statement-1. Statement-1 is true, statemet-2 is FALSE Statement-1 is false, statement-2 is true Solution :Correct explanation. `I^(-)` ions have much higher OXIDATION potential than that of water whiel `F^(-)` ions have much LOWER oxidation potential than that of water.

Discussion

8.	Statement- 1: Duringthereductionof ZnOto Zn, C is moreefficientthan CO. Statement- 2 : Thestandardfree energyofformationofCO_ 2from COisalwayshigherthatthat of ZnO.
Answer» STATEMENT - 1 is True, Statement -2 ISTRUE, Statement-2iscorrectexplanationofStatement -1. Statement- 1isTrue , Statement- 2 is not a correct EXPLANATION ofStatement - 1. Statement - 1is True, Statement - 2isFalse. Statement- 1 isFalse,Statement - 2isTrue. Answer :B

Discussion

9.	Statement-1 : During irreversible adiabatic expansion of ideal gas entropy must increase. Statement-II : Increase in entropy of the system due to expansion is only partially compensated by decrease in temperature.
Answer» Statement-I is TRUE, statement-II is true and statement-II is CORRECT EXPLANATION for statement-I Statement-I is true, statement-II is true and statement-II is NOT the correct explanation for statement-I Statement-I is FALSE, statement-II is true. Statement-I is true, statement-II is false. Answer :A

Discussion

10.	Statement-1: Dipole moment of H_(2)O is more than that of OF_(2) Statement-2: In H_(2)O , the resultant bond dipole of O-H bond and the resultant lone pair moment are in opposite direction.
Answer» STATEMENT -1 is TRUE, Statement-2 is true and statement-2 is CORRECT explanation for statement -1. Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1 Statement-1 is true, statement-2 is false Statement-1 is false, statement-2 is true. Answer :A

Discussion

11.	STATEMENT-1: During calcinations of haematite ore, ferrous oxide is oxidized to ferric oxide, and STATEMENT-2: Ferric iron does not form slag during smelting and loss of iron is prevented.
Answer» STATEMENT - 1 is TRUE, STATEMENT-2 is True, STATEMENT -2 is correct explanation for STATEMENT-1 STATEMENT - 1 is True, STATEMENT-2 is True, STATEMENT -2 is NOT a correct explanation for STATEMENT-1 STATEMENT - 1 is True, STATEMENT-2 is False STATEMENT - 1 is False, STATEMENT-2 is True Answer :A

Discussion

12.	Statement-1 : Due to adiabatic free expansion, temperature of a real gas always increases Statement-II : If a real gas is at inversion temperature then no change in temperature is observed in adiabatic free expansion.
Answer» Statement-I is TRUE, statement-II is true and statement-II is CORRECT EXPLANATION for statement-I Statement-I is true, statement-II is true and statement-II is NOT the correct explanation for statement-I Statement-I is FALSE, statement-II is true. Statement-I is true, statement-II is false. Answer :C

Discussion

13.	Statement-1 Diamond is tetrahedral, graphite is planar and C_(60) has bucky ball structures. Statement-2 Carbon in diamond, graphite and C_(60) is sp^(3),sp^(2) and sp hybridised respectively.
Answer» If both the statement are TRUE and Statement -2 is the correct explanation of Statement-1: If both the statement are TRUE but Statement-2 is not the correct explanation of Statement-1 If statement-1 is TRUE and Statement-2 is FALSE If statement -1 is FALSE and Statement-2 is TRUE Solution :Statement is correct but Explanation is wrong, DIAMOND `(sp^(3))`, graphite `(sp^(2)) C_(60)(sp^(2))`

Discussion

14.	Statement 1: Diisopropyl ketone on reaction with isopropyl magnesium bromide followed by hydrolysis gives 2^(@) alcohol. Statement 2: Grignard reagent acts as a reducing agent.
Answer» a.Statement 1 and Statement 2 are true and Statement 2 is the correct explanation of Statement 1. b.Statement 1 and Statement 2 are true and Statement 2 is not the correct explanation of Statement 1. c.Statement 1 is true and statement 2 is false. d.Statement 1 is false and statement 2 is false Solution : Hence, the G.R. acts as a REDUCING agent because the REACTION takes place via HYDRIDE ION `(H^(ɵ))` transfer to KETONE and G.R. itself is converted to alkene. Both atatements are true, so the answer is `(a)`.

Discussion

15.	Statement-1: Diamonds are forever is generally quoted for diamond as rate of conversion of diamond to graphite at room condition is nearly zero. Statement-2 :At room condition, conversion of diamond into graphite is spontaneous.
Answer» Statement-1 is True, Statement-2 is True, Statement-2 is a CORRECT explanation for Statement-1 Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1 Statement-1 is True, Statement-2 is False. Statement-1 is False, Statement-2 is True. Solution :Thermodynamically it is favourable for DIAMOND to turn into GRAPHITE, but it do not normally HAPPEN because there is HIGH energy of activation for the process.

Discussion

16.	Statement 1: Diamond and graphite do not have the same crystal structure. Statement 2: Diamond is crystalline while graphite is amorphous.
Answer» Statement 1 is true, statement 2 is true: statement 2 is a correct EXPLANATION for statement 1. Statement 1 is true, statement 2 is true, statement 2 is NOTA correct explanation for statement 1 Statement 1 is true, statement 2 is false Statement 1 is false, statement 2 is true. SOLUTION :In diamond C-atoms are `sp^(3)` hybridized while in graphite, they are `sp^(2)` hybridized.

Discussion

17.	Statement 1: D-Cl bond is stronger than H-Cl bond. statement 2: Chlorine reacts more rapidly with H_(2) than with D_(2).
Answer» STATEMENT 1 is true, statement 2 is true, statement 2 si a correct explanation for statement 15 Statement 1 is true, statement 2 is true, statement 2 is not a correct explanation for statement 15 Statement 1 is true, statement 2 is false Statement 1 is false, statement 2 is true Solution :Due to isotope EFFECT rate of REACTION of `Cl_(2)` with `D_(2)` is slower than that with `H_(2)`.

Discussion

18.	Statement -1: DeltaH of a reaction is independent of temperature. and Statement -2: DeltaH^(@) of a reacction =sum H^(@) ("products") - sum H^(@)("reactants")
Answer» STATEMENT -1 is true, Statement -2 is true, Statement -2 is correct explanation for statement -4 Statement -1 is true, Statement-2 is True, Statement-2 is not a correct explanation for Statement -4 Statement-1 is true, Statement -2 is FALSE. Statement -1 is False, Statement -2 is True. ANSWER :D

Discussion

19.	STATEMENT - 1 : Cyclohexanol is less souble in water than 1-hexanol. STATEMENT - 2 : 1- hexanol can from intermoleculae H-bond with H_(2)O.
Answer» Statement - 1 is TRUE, Statement - 2 is Ture, Statement-2 is a correct explanation for Statement-1. Statement -1 is True , Statement -2 is False. Statement -1 is False , Statement -2 is True. Statement -1 and Statement -2 both are False. Solution :N//A

Discussion

20.	Statement-1: Cyanides are more polar than isocyanides. and Statement-2: Isocynides show addition of oxygen or sulphur with HgO or HgS respectively.
Answer» Statement-1 is TRUE, Statement-2 is true, statement-2 is a CORRECT EXPLANATION for statement-9 Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-9 Statement-1 is true, statement-2 is False Statement-1 is False, Statement-2 is True. Answer :B

Discussion

21.	Statement-1: [Cu(NH_(3))_(4)]^(2+)" and "[Cu(CN_(4))]^(3-) ions are coloured. Statement-2: [Cu(NH_(3))_(4)]^(2+) involves dsp^(2) hybridization with one unpaired electron.
Answer» Statement-1 is True, Statement-2 is True , Statement-2 is a correct EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is False. Statement-1 is False, Statement-2 is True. Solution :`[Cu(CN)_(4)]3^(-)` is COLOURLESS.

Discussion

22.	Statement 1:CuSO_(4).5H_(2)O(s)hArrCuSO_(4).3H_(2)O(s)+2H_(2)O(g). For this equlibrium partial pressure of H_(2)O(g) increases continously with increasing volume. Statement 2: Vapour pressure depends only on temperarture.
Answer» Statement 1 is TRUE, stetement 2 is true,statement 2 is a CORRECT explanation for statement 3 Statement 1 is true, statement 2 is true, statement 2 is not a correct explanation for statement 3 Statement 1 is true, statement 2 is false Statement 1 is false, statement 2 is true Solution :Initially partial presure INCREASES UPTO its vapour pressure at that temperatue.

Discussion

23.	Statement-1: CuCl_(2) gives s deep blue coloured solution with ethylamine. Statement-2: Ethylamine molecules coordinate with cupric ions forming a blue coloured complex.
Answer» Statement-1 is TRUE, statement-2 is true, statement-2 is a CORRECT EXPLANATION for statement-1 Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1 Statement-1 is true, statement-2 is FALSE Statement-1 is false, statement-2 is true Answer :A

Discussion

24.	STATEMENT - 1 : Cu^(+2) is unstable in presence of Cl^(-) ion. and STATEMENT - 2 : Formation of CuCl is more favourable.
Answer» Statement-1 is TRUE, Statement-2, is True, Statement-2 is a CORRECT EXPLANATION for Statement-9 Statement-1 is True, Statement-2, is True, Statement-2 is NOT a correct explanation for Statement-9 Statement-1 is True, Statement-2 is FALSE Statement-1 is False, Statement-2 is True Answer :B

Discussion

25.	Statement-1: Cs_(2)[CoF_(6)] is an inner orbital complex with one unpaired electron. Statement-2: According to the spectrochemical series F^(-) is weak field ligans.
Answer» Statement-1 is True, Statement-2 is True , Statement-2 is a correct EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is False. Statement-1 is False, Statement-2 is True. Solution :`[overset(+4)(Co)F_(6)]^(2-)d^(5)t_(2g)^(2,2,1) eg^(0,0)`

Discussion

26.	STATEMENT-1 : CrO_(2)Cl_(2) has tetrahedral shape . and STATEMENT-2: CrO_(3) reacts with HCl to formCrO_(2)Cl_(2) .
Answer» Statement-1 is TRUE , Statement-2 is True , Statement-2 is a CORRECT explanation for Statement-1 Statement-1 is True , Statement-2 is True , Statement-2 is NOTA correct explanation for Statement-1 Statement-1 is True , Statement-2 is FALSE Statement-1 is False , Statement-2 is True Answer :B

Discussion

27.	Statement 1 : Critical temperature is the temperature at which a real gas exhibits ideal behaviour for considerable range of pressure. Statement 2 :At critical point the densities of a substance in gaseous and liquid states are same.
Answer» Statement 1 is true, statement 2 is true , statement 2 is a correct explanation for statement 1 Statement 1 is true, statement 2 is true, statement 2 is Not a correct explanation forstatement 1. Statement 1 is true, statement 2 is false Statement 1 is false , statement 2 is true. Solution :Temperature at which the real gas exhibit ideal behaviourfor considerable range of pressure is known as BOYLE's temperature, `T_(b)=(a)/(bR),a` and b are VANDER Waal's CONSTANTS. Critical temperature is the temperature above which the gas cannot be liquefied, how so ever HIGH pressure may be applied. `T_(C ) =(8a)/(27Rb)`

Discussion

28.	Statement-1: [Cr(H_(2)O)_(6)]Cl_(2)" and "[Fe(H_(2)O)_(6)]Cl_(2) are reducing in nature. Statement-2: Unpaired electrons are present in their d-orbitals.
Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Answer :B

Discussion

29.	STATEMENT-1: Cro, reacts with HCl to form chromyl chloride gas. and . STATEMENT-2: Chromyl chloride (CrO_(2)Cl_(2)) has tetrahedral shape.
Answer» STATEMENT - 1 is TRUE, STATEMENT-2 is True, STATEMENT -2 is correct explanation for STATEMENT-1 STATEMENT - 1 is True, STATEMENT-2 is True, STATEMENT -2 is NOT a correct explanation for STATEMENT-1 STATEMENT - 1 is True, STATEMENT-2 is FALSE STATEMENT - 1 is False, STATEMENT-2 is True Answer :B

Discussion

30.	Statement 1 : C_(P)-C_(V)=R for an ideal gas. Statement 2 :[(delE)/(delV)]_(T)=0 for an ideal gas.
Answer» <P>STATEMENT 1 is true, statement-2 is true, statement 2 is a correct explanation for statement 6 Statement 1 is true, statement 2 is true, statement 2 is not a correct explanation for statement 6 Statement 1 is true, statement 2 is false Statement 1 is false, statement 2 is true Solution :`C_(P)-C_(V)=R` (Ideal GAS) and `((dE)/(dV))_(T)=0` (ideal gas) Both are correct but statement 2 is not the correct explanation.

Discussion

31.	STATEMENT-1: Considering the Vander Waal's equation of state (P+(a)/(V^(2)))(V-b) =RT for ammonia (NH_(3)) and nitrogen (N_(2)). The value of a for NH_(3) is larger than that for N_(2) and STATEMENT-2: Ammonia has a lower molecular weight than nitrogen.
Answer» STATEMENT-1 is TRUE, STATEMENT-2 is True, STATEMENT-2 is CORRECT EXPLANATION for STATEMENT-1 STATEMENT-1 is True, STATEMENT-2 is True, STATEMENT-2 is NOT a correct explanation for STATEMENT-1 STATEMENT-1 is True, STATEMENT-2 is FALSE STATEMENT-1 is False, STATEMENT-2 is True Answer :B

Discussion

32.	Statement-1: Copper is dissolved at anode and deposited at cathode when Cu electrodes are used and electrolyte is 1M CuSO_(4)(aq) solution. Statement-2: SOP of Cu is less than SOP of water and SRP of Cu is greater than SRP of water.
Answer» SOLUTION :S.O.P of CU is greater than S.O.P of water `(H_(2)OtoO_(2))` and S.R.P. of Cu is greater than S.R.P of water `(H_(2)OtoH_(2))`.

Discussion

33.	Statement-1. Coordination entities with d^(4) to d^(7) ions are more stable for high spin state. Statement-2. If Delta_(0)ltP, high spin state is more stable.
Answer» Statement-1 is True, Statement-2 is True , Statement-2 is a correct EXPLANATION for Statement-3 Statement-1 is True, Statement is 2 is True , Statement-2 is NOT a correct explanation for Statement-3 Statement-1 is True, Statement-2 is False Statement-1 is False, Statement-2 is True Solution :Correct Statement-1. COORDINATION entities with `d^(4)` to `d^(7)` ions are more STABLE for low spin STATE.

Discussion

34.	Statement-1: [Co(NO_(2))_(6)]^(4-)" and "[Co(NO_(2))_(6)]^(3-) both complex involve d^(2)sp^(3) hybridization but former is paramagnetic and later one diamagnetic. Statement-2: In [Co(NO_(2))_(6)]^(4-) one of the 3d electrons jumps to 4d orbital making the two d-orbitals empty for d^(2)sp^(3) hybridization. NO_(2) is a stronger ligand which favours the pairing of electrons and therefore, d^(2)sp^(3) hybridization.
Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Answer :A

Discussion

35.	Statement-1: [Co(NH_(3))_(6)]^(2+) when exposed to air, is more easily oxidised into [Co(NH_(3))_(6)]^(3+) as compared to oxidation of Co^(2+) into Co^(3+) in gaseous state. Statement-2: In [Co(NH_(3))_(6)]^(2+) electron is to be removed from 4d, and in Co^(2+)(g), electron is removed from 3d.
Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Answer :A

Discussion

36.	Statement-1 : Conservation of a gammaphoton into an electron and a positron is an example of pair production. Statement-2: Pair production refers to the creation of an elementary particle and its antiparticle , usually when a photon interacts with a nucleus.
Answer» Statement-1 is TRUE, statement-2 is True, Statement-2 is a CORRECT EXPLANTION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOTa correct EXPLANATION for Statement-1 Statement-1 is True, Statement-2 is False. Statement-1 is False, Statement-2 is True. Answer :a

Discussion

37.	Statement-1. Co(NH_(3))_(2)Cl_(3) gives white precipitate with AgNO_(3) solution. Statement-2. Chlorine is not present in the ionising sphere.
Answer» Statement-1 is True, Statement-2 is True , Statement-2 is a correct explanation for Statement-8 Statement-1 is True, Statement is 2 is True , Statement-2 is NOT a correct explanation for Statement-8 Statement-1 is True, Statement-2 is False Statement-1 is False, Statement-2 is True Solution :Correct Statement-2. As the complex gives white precipitate with `AgNO_(3)`, ONE Cl must be present in the ionising SPHERE.

Discussion

38.	Statement-1: [Co(NH_(3))_(5)SO_(4)]Br" and "[Co(NH_(3))_(5)Br]SO_(4) are ionization isomers. Statement-2: They can distinguished by adding AgNO_(3) solution and BaCl_(2) solution respectively.
Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Answer :B

Discussion

39.	Statement-1: Conc. Solution of Li in NH_(3) is diamagnetic. Statement-2: Mg//NH_3 works as anti-hydrogenation agent. Statement-3: LiCl forms LiCl.2H_(2)O.
Answer» TFT FTF TTT FFF Answer :A

Discussion

40.	Statement-1: Complex ion [Co(NH_(3))_(6)]^(2+) si readily oxidized to [Co(NH_(3))_(6)]^(3+). Statement-2: Unpaired electron in complex ion [Co(NH_(3))_(6)]^(2+) is present in 4d orbital.
Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Answer :B

Discussion

41.	Statement-1: Complexes of MX_(6)" and "MX_(5)L type (X and L are unidentate) do not show geometrical isomerism. Statement-2: Geometrical isomerism is not shown by complexes of coordination number 6.
Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Answer :C

Discussion

42.	Assertion (A) Conductivity of all electrolytes decreases on dilution. Reason(R) On dilution number of ions per unit volume decreases.
Answer» ANSWER :A

Discussion

43.	Statement-1 : Colour of lanthanide ions are pale in nature. Statement-2 : In the f-f transition change in subsidiary quantum number is zero.
Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE Statement-1 is False and Statement-2 is True. Answer :A

Discussion

44.	Statement-1: [Co^(II)(NH_(3))_(6)]^(2+) is not readily oxidised to [Co^(III)(NH_(3))_(6)]^(3+) When air is bubbled through it. Statement-2: Crystal field stabilization energy of Co(+III) with a d^(6) configuration is higher than for Co(+II) with a d^(7) arrangement.
Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Answer :D

Discussion

45.	Statement-1: [Co(en)_(3)]^(3+) show stereoisomerism. Statement-2: EAN value of [Co(en)_(3)]^(3+) is 36.
Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT explanation for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is False. Statement-1 is False, Statement-2 is True. Solution : It is optically active so it cotains 2 stereoisomers `[Co(en)_(3)]^(3+)` EAN`rArr27-3+12=36`

Discussion

46.	Statement-1: [Co^(II)(gly)_(3)] is called inner-metallic complex or inner complex. Statement-2: Both the coordination number and charge of the Both the coordination number and charge of the cation are satisfied simultaneously by ligands.
Answer» Statement-1 is True, Statement-2 is True , Statement-2 is a correct explanation for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Solution :Some other EXAMPLES of inner METALLIC complexes : `[Cu(big)_(2)], [Cu(gly)_(2)], [Co (acac)_(3)]`

Discussion

47.	Statement-1: CO, CN^(-), NO^(+) and phospines ligands act as pi acceptor. Statement-2: In [Mn^(VII)O_(4)]^(-)" and "[Cr^(VI)O_(4)]^(2-), the ligands act as pi donor and transfer charge from ligands to metal in pi interactions as well as sigma interactions.
Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Answer :B

Discussion

48.	STATEMENT - 1 : Co^(2+) gives green colour with Br_(2) water in presence of KHCO_(3) and STATEMENT - 2 : Green colour is due to formation of CoCO_(3).
Answer» Statement-1 is TRUE, Statement-2, is True, Statement-2 is a CORRECT EXPLANATION for Statement-5 Statement-1 is True, Statement-2, is True, Statement-2 is NOT a correct explanation for Statement-5 Statement-1 is True, Statement-2 is FALSE Statement-1 is False, Statement-2 is True Answer :C

Discussion

49.	Statement-1: Cleavage of anisole with HI at 373K gives phenol and CH_(3)I. Statement-2: due to resonance O-C_(6)H_(5) bond is stronger than O-CH_(3) bond.
Answer» Statement-1 is TRUE, statement-2 is true, statement-2 is a CORRECT EXPLANATION for statement-1. Statement-1 is true,s tatement-2 is true, statement-2 is not a correct explanation for statement-1. Statement-1 is true, statement-2 is FALSE. Statement-1 is false, statement-2 is true. Answer :A

Discussion

50.	Statement - 1 : ClF is more reactive than F_(2). Statement - 2 : The F-F bond is weaker than Cl - F bond.
Answer» Statement-1 is True, Statement-2 is True , Statement-2 is a correct explanation for Statement-1. Statement-1 is True, Statement-2 is True , Statement-2 is not a correct explanation for Statement-1 Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. SOLUTION :Correct statement-1. `F_(2)` is more reactive than CIF.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Statement 1 : Entropy of solution is less than entropy of pure solvent. Statement 2 : The freezing point of water is depressed by the addition of glucose.

Statement-1 : Electrons releasing group at para position of a migrating aryl group enhances. The rate of reaction in Hofmann's preparation of primary amine from amides. Statement-2:

Statement-1 : Energy is released in the nuclear fusion of hydrogen nuclei to form helium nuclei Because Statement-2 : Binding energy per nucleon of helium greater than hydrogen.

Statement-1 : Electronegativity of an element depends on ionisation energy of that element. Statement-2 : Electroegativity regularly decreases along the group. Statement-3 : Fluorine is the most electronegative element.

Statement - 1 : Durning the reduction of ZnO to Zn, C is more efficient than CO. And Statement - 2 : The standard free energy of formation of CO_(2) from CO is always higher than that of ZnO.

Statement 1: During the electrolysis of water,two faraday of charge will produce a total of 336 litre of gases at S.T.P. at electrodes. Statement 2: Two faraday of charge will produce half mole of H_(2) and one fourth mole of O_(2) gas.

Statement-1: Electrolysis of an aqueous solution fo KI gives I_(2) at the anode but that of KF gives O_(2) at the anode and not F_(2). Statement-2: F_(2) is more reactive than I_(2).

Statement- 1: Duringthereductionof ZnOto Zn, C is moreefficientthan CO. Statement- 2 : Thestandardfree energyofformationofCO_ 2from COisalwayshigherthatthat of ZnO.

Statement-1 : During irreversible adiabatic expansion of ideal gas entropy must increase. Statement-II : Increase in entropy of the system due to expansion is only partially compensated by decrease in temperature.

Statement-1: Dipole moment of H_(2)O is more than that of OF_(2) Statement-2: In H_(2)O , the resultant bond dipole of O-H bond and the resultant lone pair moment are in opposite direction.

STATEMENT-1: During calcinations of haematite ore, ferrous oxide is oxidized to ferric oxide, and STATEMENT-2: Ferric iron does not form slag during smelting and loss of iron is prevented.

Statement-1 : Due to adiabatic free expansion, temperature of a real gas always increases Statement-II : If a real gas is at inversion temperature then no change in temperature is observed in adiabatic free expansion.

Statement-1 Diamond is tetrahedral, graphite is planar and C_(60) has bucky ball structures. Statement-2 Carbon in diamond, graphite and C_(60) is sp^(3),sp^(2) and sp hybridised respectively.

Statement 1: Diisopropyl ketone on reaction with isopropyl magnesium bromide followed by hydrolysis gives 2^(@) alcohol. Statement 2: Grignard reagent acts as a reducing agent.

Statement-1: Diamonds are forever is generally quoted for diamond as rate of conversion of diamond to graphite at room condition is nearly zero. Statement-2 :At room condition, conversion of diamond into graphite is spontaneous.

Statement 1: Diamond and graphite do not have the same crystal structure. Statement 2: Diamond is crystalline while graphite is amorphous.

Statement 1: D-Cl bond is stronger than H-Cl bond. statement 2: Chlorine reacts more rapidly with H_(2) than with D_(2).

Statement -1: DeltaH of a reaction is independent of temperature. and Statement -2: DeltaH^(@) of a reacction =sum H^(@) ("products") - sum H^(@)("reactants")

STATEMENT - 1 : Cyclohexanol is less souble in water than 1-hexanol. STATEMENT - 2 : 1- hexanol can from intermoleculae H-bond with H_(2)O.

Statement-1: Cyanides are more polar than isocyanides. and Statement-2: Isocynides show addition of oxygen or sulphur with HgO or HgS respectively.

Statement-1: [Cu(NH_(3))_(4)]^(2+)" and "[Cu(CN_(4))]^(3-) ions are coloured. Statement-2: [Cu(NH_(3))_(4)]^(2+) involves dsp^(2) hybridization with one unpaired electron.

Statement 1:CuSO_(4).5H_(2)O(s)hArrCuSO_(4).3H_(2)O(s)+2H_(2)O(g). For this equlibrium partial pressure of H_(2)O(g) increases continously with increasing volume. Statement 2: Vapour pressure depends only on temperarture.

Statement-1: CuCl_(2) gives s deep blue coloured solution with ethylamine. Statement-2: Ethylamine molecules coordinate with cupric ions forming a blue coloured complex.

STATEMENT - 1 : Cu^(+2) is unstable in presence of Cl^(-) ion. and STATEMENT - 2 : Formation of CuCl is more favourable.

Statement-1: Cs_(2)[CoF_(6)] is an inner orbital complex with one unpaired electron. Statement-2: According to the spectrochemical series F^(-) is weak field ligans.

STATEMENT-1 : CrO_(2)Cl_(2) has tetrahedral shape . and STATEMENT-2: CrO_(3) reacts with HCl to formCrO_(2)Cl_(2) .

Statement 1 : Critical temperature is the temperature at which a real gas exhibits ideal behaviour for considerable range of pressure. Statement 2 :At critical point the densities of a substance in gaseous and liquid states are same.

Statement-1: [Cr(H_(2)O)_(6)]Cl_(2)" and "[Fe(H_(2)O)_(6)]Cl_(2) are reducing in nature. Statement-2: Unpaired electrons are present in their d-orbitals.

STATEMENT-1: Cro, reacts with HCl to form chromyl chloride gas. and . STATEMENT-2: Chromyl chloride (CrO_(2)Cl_(2)) has tetrahedral shape.

Statement 1 : C_(P)-C_(V)=R for an ideal gas. Statement 2 :[(delE)/(delV)]_(T)=0 for an ideal gas.

STATEMENT-1: Considering the Vander Waal's equation of state (P+(a)/(V^(2)))(V-b) =RT for ammonia (NH_(3)) and nitrogen (N_(2)). The value of a for NH_(3) is larger than that for N_(2) and STATEMENT-2: Ammonia has a lower molecular weight than nitrogen.

Statement-1: Copper is dissolved at anode and deposited at cathode when Cu electrodes are used and electrolyte is 1M CuSO_(4)(aq) solution. Statement-2: SOP of Cu is less than SOP of water and SRP of Cu is greater than SRP of water.

Statement-1. Coordination entities with d^(4) to d^(7) ions are more stable for high spin state. Statement-2. If Delta_(0)ltP, high spin state is more stable.

Statement-1: [Co(NH_(3))_(6)]^(2+) when exposed to air, is more easily oxidised into [Co(NH_(3))_(6)]^(3+) as compared to oxidation of Co^(2+) into Co^(3+) in gaseous state. Statement-2: In [Co(NH_(3))_(6)]^(2+) electron is to be removed from 4d, and in Co^(2+)(g), electron is removed from 3d.

Statement-1 : Conservation of a gammaphoton into an electron and a positron is an example of pair production. Statement-2: Pair production refers to the creation of an elementary particle and its antiparticle , usually when a photon interacts with a nucleus.

Statement-1. Co(NH_(3))_(2)Cl_(3) gives white precipitate with AgNO_(3) solution. Statement-2. Chlorine is not present in the ionising sphere.

Statement-1: [Co(NH_(3))_(5)SO_(4)]Br" and "[Co(NH_(3))_(5)Br]SO_(4) are ionization isomers. Statement-2: They can distinguished by adding AgNO_(3) solution and BaCl_(2) solution respectively.

Statement-1: Conc. Solution of Li in NH_(3) is diamagnetic. Statement-2: Mg//NH_3 works as anti-hydrogenation agent. Statement-3: LiCl forms LiCl.2H_(2)O.

Statement-1: Complex ion [Co(NH_(3))_(6)]^(2+) si readily oxidized to [Co(NH_(3))_(6)]^(3+). Statement-2: Unpaired electron in complex ion [Co(NH_(3))_(6)]^(2+) is present in 4d orbital.

Statement-1: Complexes of MX_(6)" and "MX_(5)L type (X and L are unidentate) do not show geometrical isomerism. Statement-2: Geometrical isomerism is not shown by complexes of coordination number 6.

Assertion (A) Conductivity of all electrolytes decreases on dilution. Reason(R) On dilution number of ions per unit volume decreases.

Statement-1 : Colour of lanthanide ions are pale in nature. Statement-2 : In the f-f transition change in subsidiary quantum number is zero.

Statement-1: [Co^(II)(NH_(3))_(6)]^(2+) is not readily oxidised to [Co^(III)(NH_(3))_(6)]^(3+) When air is bubbled through it. Statement-2: Crystal field stabilization energy of Co(+III) with a d^(6) configuration is higher than for Co(+II) with a d^(7) arrangement.

Statement-1: [Co(en)_(3)]^(3+) show stereoisomerism. Statement-2: EAN value of [Co(en)_(3)]^(3+) is 36.

Statement-1: [Co^(II)(gly)_(3)] is called inner-metallic complex or inner complex. Statement-2: Both the coordination number and charge of the Both the coordination number and charge of the cation are satisfied simultaneously by ligands.

Statement-1: CO, CN^(-), NO^(+) and phospines ligands act as pi acceptor. Statement-2: In [Mn^(VII)O_(4)]^(-)" and "[Cr^(VI)O_(4)]^(2-), the ligands act as pi donor and transfer charge from ligands to metal in pi interactions as well as sigma interactions.

STATEMENT - 1 : Co^(2+) gives green colour with Br_(2) water in presence of KHCO_(3) and STATEMENT - 2 : Green colour is due to formation of CoCO_(3).

Statement-1: Cleavage of anisole with HI at 373K gives phenol and CH_(3)I. Statement-2: due to resonance O-C_(6)H_(5) bond is stronger than O-CH_(3) bond.

Statement - 1 : ClF is more reactive than F_(2). Statement - 2 : The F-F bond is weaker than Cl - F bond.