94420 + Interview Questions in Chemistry in Class 12

1.	Assertion : On passing electric current in colloidal solution they do not move towards anode or cathode. Reason: They do not contain any charge
Answer» If both ASSERTION and reason are true and reason is the correct explanation of assertion. If both assertion and reason are true but reason is not the correct explanation of assertion. If assertion is true but reason is false. If both assertion and reason are false. Solution :If no. of step INCREASES, PROCESS Shift towards REVERSIBLE process so work's increases

Discussion

2.	Assertion :- O.N. of carbon in H-C-=N is +4. Reason :- Carbon always shows an O.N of +4.
Answer» If both ASSERTION & Reason are TRUE & the Reason is a CORRECT explanation of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is False. If both Assertion & Reason are False. Answer :D

Discussion

3.	Assertion : On mixing 500 ml of 10^(-6) M Ca^(2+) ion and 500 ml of 30 xx 10^(-6) M F^(-)ion, the precipitate of CaF_(2) will be obtained. K_(sp) (CaF_(2) = 10^(-18)) Reason : If K_(sp) is greater than ionic product, a precipitate will develop.
Answer» If both assertion and reason are TRUE and reason is the correct EXPLANATION of the assertion If both assertion and reason are true but reason is not the correct explanation of the assertion. If assertion is true but reason is FALSE. If the assertion and reason both are false. Solution :`CaF_(2) hArr Ca^(2+) + 2F^(-)` `K = ((10^(-6))/(2))((10^(-6))/(2))^(2) = 1.25 xx 10^(-19)` which is less than `K_(sp)`. Hence, no precipitate will develop. Thus, both assertion and reason are false.

Discussion

4.	Assertion: On dilution, the equivalent as well as molar conductivity of the solution increases. Reason: With dilution, the number of current carrying particles per cm^(3) increases.
Answer» If both ASSERTION and reason are true, and reason is the true explanation of the assertion if both assertion and reason are true, but reason is not the true explanation of the assertion. if assertion is true, but reason is false. If both assertion and reason are false. Solution :Correct R. on diluton, the number of current carrying particles PER `cm^(3)` decreases and hence specific conductivity decreases. `wedge_(EQ) and wedge_(m)` increase with dilution because `wedge_(eq)=` sp. Conductivity `XX` volume of solution containing 1 g eq. of the electrolyte and `wedge_(m)=`sp. conductivity`xx`volume of solution containing 1 mole of th electrolyte and volume increases much more than decrease in specific conductivity.

Discussion

5.	Assertion : ON cooling a frezing maxture, colour of the mixture turns to pink from deep blue for a reaction Co(H_(2)P)_(6(aq))^(2+)+4Cl_(aq)^(-)hArrCoCl_(4(aq))^(2-)+6H_(2)O_((1)). Reason: Reaction is endothermic so on cooling, the reacton moves to backward direction.
Answer» If both ASSERTION and reason are TRUE and the reason is the CORRECT explanation of the assertion. If both assertion and reason are true but reason is not the correct explanation of the assertion. If assertion is true but reason is FALSE. If the assertion and reason both are false. Answer :C

Discussion

6.	Assertion. On cooling, the brown colour of nitrogen dioxide disappears. Reason. ON cooling, NO_(2) undergoes dimerisation resulting in the pairing of odd electron of NO_(2).
Answer» If both assertion and reason are true, and reason is the correct explanation of the assertion. If both assertion and reason are ture, but reason is not the correct explanantion of the assertion. If assertion is true, but reason is false. If both assertion and reason are false Solution :Correct reason. The lone pair of electrons on the N ATOM is strongly attracted by the three strongly electronegative F atoms. As a result, it is not available for DONATION and hence `NF_(3)` is a weak LIGAND.

Discussion

7.	Assertion :- On adding NACl to water its vapour pressure increases. Reason :- Addition of non-volatile solute increases the vapour pressure.
Answer» If both assertion and reason are true and the reason is the correct explanation of the assertion. If both assertion and reason are true but reason is not the correct explanation of the assertion. If assertion is true but reason is false. If the assertion and reason both are false. Solution :If a non-volatile solute is ADDED to water its vapour pressure ALWAYS DECREASES. THEREFORE, both assertion and reason are false.

Discussion

8.	Assertion : Oils are purified by steam distillation. Reason : The compound which decompose at their boiling points can purified by steam distillation.
Answer» If both assertion and reason are TRUE and the reason is the correct explanation of the assertion. If both assertion and reason are true but reson is not the correct explanation of the assertion. If assertion is true but reason is false. If the assertion and reason both are false. Solution :STEAM distillation is carried out only when a solid or liquid ininsoluble in WATER and VOLATILE with steam but the impurities are non-volatile.

Discussion

9.	Assertion : Olefinic monomers undergo addition polymerisation. Reason : Polymerisation of vinyl chloride is initiated by peroxides/ persulphates.
Answer» Assertion and reason both are correct statements and reason does not explain assertion. Assertion and reason both are correct statements but reason explains the assertion. Both assertion and reason are wrong statements. Assertion is correct statement and reason is wrong statement. Solution :Correct EXPLANATION : DUE to the presence of double bonds , a large number of OLEFIN molecules simply ADD to a high MOLECULAR mass molecule.

Discussion

10.	Assertion : Octahedral complex of type [MABCDEF) ^(n+-)exhibits only two geometrical isomers. Reason: As the number of different ligands increase the number of possible isomers decreases.
Answer» Both ASSERTION and reason are true and the reason is the CORRECT EXPLANATION of the assetion Both the assertion and reason are true but the reason is not the correct explanation of the assertion. Assertion is true but reason is false Both assertion and reason are false ANSWER :D

Discussion

11.	Assertion: Octahedral complex[Fe(CN)_6]^(3-)is a low spin complex . Reason : It has a negative CFSE value.
Answer» Both ASSERTION and REASON are TRUE and the reason is the correct EXPLANATION of the assetion Both the assertion and reason are true but the reason is not the correct explanation of the assertion. Assertion is true but reason is false Both assertion and reason are false Answer :A

Discussion

12.	Assertion: o-Nitrophenol is less soluble in water in water than the m- and p-isomers. Reason: m- and p-Nitrophenols exist as associated molecules.
Answer» Assertion and reason both are CORRECT and reason is correct EXPLANATION of assertion. Assertion and reason both are wrong statement. Assertion is correct statement but reason is wrong statement. Both assertion and reason are correct STATEMENTS but reason is not correct explanation of assertion. Solution :Correct explanation. DUE to CHELATION, o-nitrophenol does not form H-bonds with `H_(2)O` but m- and p-nitrophenols form H-bonds with `H_(2)O`.

Discussion

13.	Assertion : o-Hydrozybenaldehyde is less soluable in water than p-Hydroxybenzalbenzaldehye. Reason : Intra molecular hydrogen bonding in o-Hydrozbenzaldehyde Decrease extent of intermolecular hydrogen bonding with water
Answer» Assertion is TRUE, REASON is true, Reason is a correct explanation for Assertion Assertion is true, Reason is true, Reason is not a correct explanation for Assertion Assertion is true, Reason is FALSE Assertion is false, Reason is true Answer :A

Discussion

14.	Assertion: O and p-nitrophenols can be separated by steam distillation Reason: O-isomeris steamvolatile due to chelation and p-isomer is not steam volatile due to intermolecular hydrogen bonding
Answer» If both ASSERTION and reasonare CORRECT and REASON is the CORRECT EXPLANATION of the assertion If both assertion and reason are CORRECT, but reason is NOT the CORRECT explanation of the assertion If assertion is CORRECT but reason is INCORRECT If assertion is INCORRECT but reason is CORRECT Answer :A

Discussion

15.	Assertion : Nylon - 66 is condensation polymer Reason : It is formed by the reaction between functional groups of adjacent monomers with elimination of H_2O .
Answer» (A) and (R) are true and (R) is the CORRECT explanation of (A) Both (A) and (R) are true but (R) does not explain (A) (A) is true but (R) is FALSE Both (A) and (R) are false Answer :A

Discussion

16.	Assertion : Nylon 6, 6 is prepared by condensation Reason polymerisation of hexamethylenediamine and terephthalic acid. Reason : Nylon 6, 6 is a fibre polymer.
Answer» Assertion and reason both are CORRECT statements and reason is correct EXPLANATION for assertion. Assertion and reason both are correct statements but reason is not correct explanation for assertion. Assertion is correct statement but reason is wrong statement. Assertion is wrong statement but reason is correct statement. Solution :Correct assertion : NYLON 6, 6 is a condensation polymer of hexamethylenediamine and adipic acid.

Discussion

17.	Assertion: Number of unpaired electrons present in [Cu(NH_3)_2](+)complex is zero Reason:The complex [Cu(NH_3)_2]^(+) is linear with sp-hybridization.
Answer» Both Assertion & REASON are true ,Reason is the correct explanation of Assertion Both Assertion & Reason are true, Reason is not correct explanation of Assertion Assertion is true , Reason is false Assertion is false , Reason is false ANSWER :B

Discussion

18.	Assertion: Nucleophilic substitution reaction in an optically active alkyl halide gives a mixture of enantiomers. Reason: Reactio occurs by S_(N^(1)) mechanism.
Answer» If both ASSERTION and REASON are CORRECT and reason is correct EXPLANATION for assertion If both assertion and reason are correct but reason is not correct explanation for assertion. If assertion is correct but reason is incorrect. if both assertion and reason are incorrect. Solution :Reason is correct explanation for assertion.

Discussion

19.	Assertion : Nuclear forces and called short range forces. Reason :Nuclear forces operate over very small distance i.e., 10^(-15) m or 1 fermi
Answer» If both assertion and reason are TRUE and the reason is the correct EXPLANATION of the assertion If both assertion and reason are true but reason is not the correct explanantion of the assertion If assertion is true but reason is false If the assertion and reason both are false Answer :A

Discussion

20.	Assertion : Non-competitive inhibitor inhibits the catalytic activity of enzyme by binding with its active site Reason: Non-competitive inhibitor changes the shape of the active site in such a way that substrate can't recognise it.
Answer» ASSERTION and reason both are correct statement but reason does not EXPLAIN assertion Assertion and reason both are correct and reason explains the assertion Both assertion and reason are wrong statement Assertion iswrong statement reason iscorrect statement Solution :Correct assertion. Non-competitive inhibitor INHIBITS the catalytic activity by BINDING the enzyme at the allosteric site.

Discussion

21.	Assertion : Nuclear fission is always accompanied by release of energy Reason : Nuclear fission is a chain process
Answer» If both ASSERTION and REASON are true and the reason is the correct explanation of the assertion If both assertion and reason are true but reason is not the correct explanantion of the assertion If assertion is true but reason is false If the assertion and reason both are false Solution :It is correct that during nuclear FISSION energy is always RELEASED and it is also true that nuclear fission is a chain process

Discussion

22.	Assertion : Noble gases have positive electron gain enthalpy. Reason : Noble gases have stable closed shell electronic configuration.
Answer» If both assertion and REASON are TRUE, and reason is the correct EXPLANATION of the assertion. If both assertion and reason are TURE, but reason is not the correct explanantion of the assertion. If assertion is true, but reason is false. If both assertion and reason are false Answer :A

Discussion

23.	Assertion : Noble gases have maximum electron affinity. Reason : High electron affinity shows that the electron is loosely bonded to the atom.
Answer» If both ASSERTION and reason are true and the reason is the correct EXPLANATION of the assertion If both assertion and reason are true but reason is not a correct explanation of the assertion Ifassertion is true but reason is false If the assertion and reason both are false Solution :All NOBLE GASES have stable configuration. Therefore, they can not take any electron means that they have no affinity for electrons. High electron affinity shows that electron is strongly bonded to the atom. Here both assertion and reason are false.

Discussion

24.	Assertion : Noble gases have highest ionization energies in their respective periods. Reason : The outermost sub-shell of noble gases in which electron enters is completely filled.
Answer» Both assertion and reason are true and reason is the CORRECT EXPLANATION of the assertion Both assertion and reason are true and reason is not the correct explanation of the assertion. Assertion is true but reason is false Both assertion and reason are false. Answer :A::B::C::D

Discussion

25.	Assertion : Noble gases have highest ionisation enthalpies in their respective periods. Reason : Noble gases have stable closed shell electronic configuration.
Answer» If both ASSERTION and REASON are TRUE ANND the reason is the correct explanation of assertion If both assertion and reason are true but reason is not the correct explanation of assertion If assertion is true but the reason is FALSE if assertion is false but the reason is true Answer :A

Discussion

26.	Assertion: NO_(3)^(-) ion can not be detected by brown ring test in presence of NO_(2)^(-) ion. Reason: Both NO_(2)^(-) and NO_(3)^(-) ions evolve brown NO_(2) gas with conc. H_(2)SO_(4) acid.
Answer» If ASSERTION is true but the reason is FALSE If assertion is false but reason is true If both assertion and reason are true and reason is the CORRECT EXPLANATION of assertion If OTH assertion and reason are true but reason is not the correct explanation of assertion Answer :C

Discussion

27.	Assertion: N,N-Diethylbenzenesulphonamide is insoluble in alkali. Reason: Sulhponyl group attached to nitrogen atom is a strong electron withdrawing group.
Answer» Both assertion and REASON are WRONG. Both assertion and reason are correct STATEMENTS but reason is not correct explanation of assertion. Assertion is correct statement but reason is wrong statement. Both assertion and reason are correct statements and reason is correct explanation of assertion. Solution :Correct explanation. SINCE acidic hydrogen is not present on the N-atom, therefore, N,N- diethylbenzenesulphonamide is insoluble in alkali.

Discussion

28.	Assertion : N,N–Diethylethanamine is more basic then N,N-Dimethylmethanamine Reason : +I effect of ethyl is more then methyl
Answer» (1) If both assertion and reason are true and reason is the CORRECT explanation of assertion. f both assertion and reason are true but reason is not the correct explanation of assertion. If assertion is true but reason is false. If both assertion and reason are false. Solution : N, N Diethylethylomine +l EFFECT of `C_(2)H_(5)-` GROUP more than `CH_(3)-` group.

Discussion

29.	Assertion : Nitrogen in inactive at room temperature but becomes reactive at elevated temperature (on heating or in the presence of catalyst). Reason : In nitrogen molecule, there is delocalization electrons.
Answer» If assertion is TRUE but the REASON is false If assertion is false but reason is true If both assertion and reason are true and the reason is the correct explanation of assertion If both assertion and reason are true and the reason is not the correct explanation of assertion Answer :A

Discussion

30.	Assertion. Nitrogen is less reactive than molecular oxygen. Reason. The bond length of N_(2) is shorter than that of oxygen.
Answer» If both assertion and reason are true, and reason is the CORRECT explanation of the assertion. If both assertion and reason are TURE, but reason is not the correct EXPLANANTION of the assertion. If assertion is true, but reason is false. If both assertion and reason are false Solution :Correct explanation. Because of the presence of a TRIPLE bond, dissociation energy of NITROGEN is much higherthan that of oxygen.

Discussion

31.	Assertion : Nitrogenand Oxygenare themaincomponentsin theatmospherebutthese do notreact to formoxidesofnitrogen Reason : Thereactionbetweennitrogenand oxygenrequireshightemperature.
Answer» bothassertion and reasonare correctandther REASON is the CORRECTEXPLANATION for theassertion. bothassertionandreasonare correct but the assertionis incrrectbut the reasonis CORRECTION Both theassertinandreasonare incorrect. Solution :The REACTIONOF `N_(2)+ O_(2) to`2NOoccursat very hightemperature mostyly duringlightningorthunderstom .

Discussion

32.	Assertion: Nitrobenzene is used as a solvent in Friedel-Crafts reaction. Reason: Fusion of nitrobenzene with solid KOH gives a low yield of a mixture of o- and p-nitrophenols.
Answer» If both assertion and reason are true, and reason is the true explanation of the assertion. If both assertion and reason are TURE, but reason is not the true explanation of the assertion. If assertion is true, but reason is false. If both assertion and reason are false. Solution :CORRECT explanation: DUE to strong electron-withdrawing resonance and inductive effect of the `-NO_(2)` group, electron density decreases in the benzene ring and HENCE it does not undergo F.C. benzene ring and hence it does not undergo F.C. REACTION.

Discussion

33.	Assertion. Nitrogen and oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason. The reaction between nitrogen and oxygen requires high temperature.
Answer» If both ASSERTION and reason are TRUE, and reason is the CORRECT explanation of the assertion. If both assertion and reason are TURE, but reason is not the correct EXPLANANTION of the assertion. If assertion is true, but reason is false. If both assertion and reason are false Answer :A

Discussion

34.	Assertion: Nitrobenzene is used as a solvent in Friedel-Craft's reaction. Reason: Fusion of nitrobenzene with solid KOH gives a low yield of a mixture of o-and p-nitro phenols.
Answer» Solution :Due to strong deactivation of BENZENE ring by `-NO_(2)` GROUP, nitrobenzene is oftenused as a SOLVENT in Friedel-Craft's REACTION.

Discussion

35.	Assertion : Nitriding is the process of heating steel in presence of N_(2) to form iron nitrides. Reason : The surface of steel becomes hard after nitriding process.
Answer» If both assetion and reason are CORRECT, and reason is the CORRECT explanation of the ASSERTION If both assertion and reason are CORRECT, but reason is NOT the CORRECT explanation of the assertion If assertion is CORRECT but reason is INCORRECT If assertion is INCORRECT but reason is CORRECT Answer :D

Discussion

36.	Assertion : Nitride ion (N^(3-)) and magnesium ion (Mg^(2+)) are both isoelectronic species. Reason : the charge on nitride is different from Mg^(2+) ion.
Answer» If both ASSERTION and reason are correct and reason is correct EXPLANATION for assertion. If both assertion and reason are correct but reason is not correct explanation for assertion. If assertion is correct but reason is incorrect. If both assertion and reason are incorrect. Solution :Correct explanation : Since both IONS have same number of ELECTRONS (10).

Discussion

37.	Assertion: Nitriding is a process of heating steel in an atmosphere of nitrogen. Reason: Steel becomes brittle after nitriding.
Answer» If both assertion and Reason are true and the Reason is the correct explanation of the assertion. If both assertion and Reason are true but the reason is not the correct explanation of the assertion If assertion is true but reason is false If both assertion and reason are false. Solution :Nitridin is a process of heating STEEL in ANN atmosphere of ammonia. It imparrts a hard COATING of iron nitride on the surface of steel.

Discussion

38.	Assertion: Nitration of chlorobenzene leads to the formation of m-nitrochlorobenzene. Reason: -NO_(2) group is a m-directing group.
Answer» ASSERTION and reason both are CORRECT and reason is correct explanation of assertion. Assertion and reason both are wrong statements. Assertion is correct but reason is wrong statement. Assertion is wrong but reason is correct statement. Solution :Correct assertion. Chlorination of nitrobenzene LEADS to the FORMATION of m-chloronitrobenzene.

Discussion

39.	Assertion: Nitrating mixture used for carrying out nitration of benzene consists of conc. HNO_(3)+"conc". H_(2)SO_(4). Reason: In presence of H_(2)SO_(4),HNO_(3) acts as a base and produces NO_(2)^(+) ions.
Answer» If both assertion and reason are true and the reason is the CORRECT EXPLANANTION of the assertion. If both assertion and reason are true but reason is not the correct explanantion of the assertion. If assertion is true but reason is FALSE. If the assertion and reason both are false. Solution :`HNO_(3)+2H_(2)SO_(4)hArr2HSO_(4)^(-)+NO_(2)^(+)+H_(3)overset(+)O`

Discussion

40.	Assertion :NiO is less than CaO. Reason :Ni^(2+) is pseudo noble gas configuration cation whereas Ca^(2+) is noble gas configuration cation.
Answer» If ASSERTION is TRUE but the REASON is false If assertion is false but reason is true If both assertion and reason are true and the reason is the correct explanation of assertion If both assertion and reason are true and the reason is not the correct explanation of assertion Answer :A

Discussion

41.	Assertion : Nickel can be purified by Mond's process. Reason: Ni(CO)_4 is a volatile compound which decomposes at 460 K to give pure Ni.
Answer» Both ASSERTION and REASON are TRUE and reason is the correct explanation of assertion. Both assertion and reason are true but reason is not the correct explanation of assertion. Assertion is true but reason is FALSE. Assertion is false but reason is true. Answer :A

Discussion

42.	Assertion. Ni(CO)_(4) is a diamagnetic complex. Reason. All the electrons in the complex are paired.
Answer» If both ASSERTION and reason are TRUE, but reason is not the true explanation of the assertion If both assertion and reason are true, but reason is not the true explanation of the assertion If assertionis true, but reason is false If both assertion and reason are false Solution :R is the correct EXPLANTION of A.

Discussion

43.	Assertion : Nickel can be purified by Mond processs. Reason : Ni(CO)_(4) is a volatile compound which decomposes at 460 K to give pure Ni.
Answer» Both ASSERTION and REASON are TRUE and reason is the correct explanation of assertion. Both assertion and reason are true but reason is not the correct explanation of assertion. Assertion is false but reason is false. Assertion is false but reason is true. Solution :Reason is the correct explanation for Assertion.

Discussion

44.	Assertion:Nickelcan bepurifiedby Mondprocess.Reason:Ni (CO ) _4isavolatilecompoundwhichdecomposes at460Kto givepureNi.
Answer» Bothassertionandreason aretrueandreason is thecorrectexplanationofassertion. Both assertionandreasonaretruebutreasonis not thecorrectexplanationofassertion. Assertionistrue butreasonisfalse. Assertionis falsebutreasonistrue. SOLUTION :Both assertionandreasongare trueandreason isthecorrectexplanationofassertion.

Discussion

45.	Assertion: Ni//Ni^(2+)(1.0M)\|\|Au^(3+)(1.0M)\|Au, for this cell emf is 1.75V if E_(Au^(3+)//Au)^(o)=1.50 and E_(Ni^(2+)//Ni)^(o)=0.25V Reason: Emf of the cell =E_("cathode")^(o)-E_("anode")^(o)
Answer» if both assertion and REASON are TRUE and the reason is the correct EXPLANATION of the assertion. If both assertion and reason are true but reason is not the correct explanation of the assertion. If assertion is true but reason is false If the assertion and reason both are false. Solution :Both assertion and reason are true and reason is the correct explanation of assertion. `E_(AU^(3+)//Au)^(@)-E_(Ni//Ni^(2+))^(@)=1.50-(+0.25)=1.25V`

Discussion

46.	Assertion [Ni (CO)_(4)] has longer C-O bond lengththan the same in [Cr(CO)_(5) NH_(3)] Reason There is greater extent of d pi - rho pi back bonding in [Ni (CO)_(4)] than in [Cr (CO)_(5) NH_(3)]
Answer» ANSWER :A

Discussion

47.	Assertion. NF_(3) is weaker ligand than N(CN_(3))_(3). Reason. NF_(3) ionizes to give F^(-) ions in aqueous solution.
Answer» If both ASSERTION and REASON are true, but reason is not the true explanation of the assertion If both assertion and reason are true, but reason is not the true explanation of the assertion If assertionis true, but reason is false If both assertion and reason are false Solution :Correct A. F is highly electronegative. It attracts the electrons of N TOWARDS itself and hence are not easily available on N, making it a WEAKER donor or ligand.

Discussion

48.	Assertion : Network polymers are thermosetting. Reson : Network polymers have high molecular mass.
Answer» Assertion and reason both are correct statements and reason does not explain assertion. Assertion and reason both are correct statements but reason explains the assertion. Both assertion and reason are wrong statements. Assertion is correct statement and reason is wrong statement. SOLUTION :Correct explanation : Extensive cross linking during POLYMERIZATION LEADS to the formation of three dimensional NETWORK solied which is hard , influsible and INSOLUBLE.

Discussion

49.	Assertion: Neoprene can be further hardened by heating in presence of sulphur. Reason : Neoprene contains allylic double bonds which help in introducing sulphur bridges between different polymer chains.
Answer» If both assertion and reason are TRUE , and reason is the true EXPLANATION of the assertion. If both assertion and reason are true , but reason is not the true explanation of the assertion. If assertion is true , but reason is FALSE. If both assertion and reason are false. Answer :A

Discussion

50.	Assertion: Neopenty alcohol on treatment with HCl gives neopentyl chloride. Reason: Neopentyl is a tertiary alcohol.
Answer» If both ASSERTION and reason are true, and reason is the true explanation of the assertion. If both assertion and reason are true, but reason is not the true explanation o the assertion. if assertion is true, but reason is false. If both assertion and reason are false. Solution :Correct assertion. Neopentyl alcohol on treatment with HCL gives 2-chloro-2-methylbutane and not neopentyl chloride. Correct reason. This reaction occurs via rearrangement of initially formed less stable `1^(@)` carbocation to the more stable `3^(@)` carbocations. `CH_(3)-UNDERSET(CH_(3))underset(\|)overset(CH_(3))overset(\|)(C)-CH_(2)OH underset(-H_(2)O)overset(HCl)to CH_(3)-underset(Cl)underset(\|)overset(CH_(3))overset(\|)(C)-CH_(2)CH_(3)`.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Assertion : On passing electric current in colloidal solution they do not move towards anode or cathode. Reason: They do not contain any charge

Assertion :- O.N. of carbon in H-C-=N is +4. Reason :- Carbon always shows an O.N of +4.

Assertion : On mixing 500 ml of 10^(-6) M Ca^(2+) ion and 500 ml of 30 xx 10^(-6) M F^(-)ion, the precipitate of CaF_(2) will be obtained. K_(sp) (CaF_(2) = 10^(-18)) Reason : If K_(sp) is greater than ionic product, a precipitate will develop.

Assertion: On dilution, the equivalent as well as molar conductivity of the solution increases. Reason: With dilution, the number of current carrying particles per cm^(3) increases.

Assertion : ON cooling a frezing maxture, colour of the mixture turns to pink from deep blue for a reaction Co(H_(2)P)_(6(aq))^(2+)+4Cl_(aq)^(-)hArrCoCl_(4(aq))^(2-)+6H_(2)O_((1)). Reason: Reaction is endothermic so on cooling, the reacton moves to backward direction.

Assertion. On cooling, the brown colour of nitrogen dioxide disappears. Reason. ON cooling, NO_(2) undergoes dimerisation resulting in the pairing of odd electron of NO_(2).

Assertion :- On adding NACl to water its vapour pressure increases. Reason :- Addition of non-volatile solute increases the vapour pressure.

Assertion : Oils are purified by steam distillation. Reason : The compound which decompose at their boiling points can purified by steam distillation.

Assertion : Olefinic monomers undergo addition polymerisation. Reason : Polymerisation of vinyl chloride is initiated by peroxides/ persulphates.

Assertion : Octahedral complex of type [MABCDEF) ^(n+-)exhibits only two geometrical isomers. Reason: As the number of different ligands increase the number of possible isomers decreases.

Assertion: Octahedral complex[Fe(CN)_6]^(3-)is a low spin complex . Reason : It has a negative CFSE value.

Assertion: o-Nitrophenol is less soluble in water in water than the m- and p-isomers. Reason: m- and p-Nitrophenols exist as associated molecules.

Assertion : o-Hydrozybenaldehyde is less soluable in water than p-Hydroxybenzalbenzaldehye. Reason : Intra molecular hydrogen bonding in o-Hydrozbenzaldehyde Decrease extent of intermolecular hydrogen bonding with water

Assertion: O and p-nitrophenols can be separated by steam distillation Reason: O-isomeris steamvolatile due to chelation and p-isomer is not steam volatile due to intermolecular hydrogen bonding

Assertion : Nylon - 66 is condensation polymer Reason : It is formed by the reaction between functional groups of adjacent monomers with elimination of H_2O .

Assertion : Nylon 6, 6 is prepared by condensation Reason polymerisation of hexamethylenediamine and terephthalic acid. Reason : Nylon 6, 6 is a fibre polymer.

Assertion: Number of unpaired electrons present in [Cu(NH_3)_2](+)complex is zero Reason:The complex [Cu(NH_3)_2]^(+) is linear with sp-hybridization.

Assertion: Nucleophilic substitution reaction in an optically active alkyl halide gives a mixture of enantiomers. Reason: Reactio occurs by S_(N^(1)) mechanism.

Assertion : Nuclear forces and called short range forces. Reason :Nuclear forces operate over very small distance i.e., 10^(-15) m or 1 fermi

Assertion : Non-competitive inhibitor inhibits the catalytic activity of enzyme by binding with its active site Reason: Non-competitive inhibitor changes the shape of the active site in such a way that substrate can't recognise it.

Assertion : Nuclear fission is always accompanied by release of energy Reason : Nuclear fission is a chain process

Assertion : Noble gases have positive electron gain enthalpy. Reason : Noble gases have stable closed shell electronic configuration.

Assertion : Noble gases have maximum electron affinity. Reason : High electron affinity shows that the electron is loosely bonded to the atom.

Assertion : Noble gases have highest ionization energies in their respective periods. Reason : The outermost sub-shell of noble gases in which electron enters is completely filled.

Assertion : Noble gases have highest ionisation enthalpies in their respective periods. Reason : Noble gases have stable closed shell electronic configuration.

Assertion: NO_(3)^(-) ion can not be detected by brown ring test in presence of NO_(2)^(-) ion. Reason: Both NO_(2)^(-) and NO_(3)^(-) ions evolve brown NO_(2) gas with conc. H_(2)SO_(4) acid.

Assertion: N,N-Diethylbenzenesulphonamide is insoluble in alkali. Reason: Sulhponyl group attached to nitrogen atom is a strong electron withdrawing group.

Assertion : N,N–Diethylethanamine is more basic then N,N-Dimethylmethanamine Reason : +I effect of ethyl is more then methyl

Assertion : Nitrogen in inactive at room temperature but becomes reactive at elevated temperature (on heating or in the presence of catalyst). Reason : In nitrogen molecule, there is delocalization electrons.

Assertion. Nitrogen is less reactive than molecular oxygen. Reason. The bond length of N_(2) is shorter than that of oxygen.

Assertion : Nitrogenand Oxygenare themaincomponentsin theatmospherebutthese do notreact to formoxidesofnitrogen Reason : Thereactionbetweennitrogenand oxygenrequireshightemperature.

Assertion: Nitrobenzene is used as a solvent in Friedel-Crafts reaction. Reason: Fusion of nitrobenzene with solid KOH gives a low yield of a mixture of o- and p-nitrophenols.

Assertion. Nitrogen and oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason. The reaction between nitrogen and oxygen requires high temperature.

Assertion: Nitrobenzene is used as a solvent in Friedel-Craft's reaction. Reason: Fusion of nitrobenzene with solid KOH gives a low yield of a mixture of o-and p-nitro phenols.

Assertion : Nitriding is the process of heating steel in presence of N_(2) to form iron nitrides. Reason : The surface of steel becomes hard after nitriding process.

Assertion : Nitride ion (N^(3-)) and magnesium ion (Mg^(2+)) are both isoelectronic species. Reason : the charge on nitride is different from Mg^(2+) ion.

Assertion: Nitriding is a process of heating steel in an atmosphere of nitrogen. Reason: Steel becomes brittle after nitriding.

Assertion: Nitration of chlorobenzene leads to the formation of m-nitrochlorobenzene. Reason: -NO_(2) group is a m-directing group.

Assertion: Nitrating mixture used for carrying out nitration of benzene consists of conc. HNO_(3)+"conc". H_(2)SO_(4). Reason: In presence of H_(2)SO_(4),HNO_(3) acts as a base and produces NO_(2)^(+) ions.

Assertion :NiO is less than CaO. Reason :Ni^(2+) is pseudo noble gas configuration cation whereas Ca^(2+) is noble gas configuration cation.

Assertion : Nickel can be purified by Mond's process. Reason: Ni(CO)_4 is a volatile compound which decomposes at 460 K to give pure Ni.

Assertion. Ni(CO)_(4) is a diamagnetic complex. Reason. All the electrons in the complex are paired.

Assertion : Nickel can be purified by Mond processs. Reason : Ni(CO)_(4) is a volatile compound which decomposes at 460 K to give pure Ni.

Assertion:Nickelcan bepurifiedby Mondprocess.Reason:Ni (CO ) _4isavolatilecompoundwhichdecomposes at460Kto givepureNi.

Assertion: Ni//Ni^(2+)(1.0M)||Au^(3+)(1.0M)|Au, for this cell emf is 1.75V if E_(Au^(3+)//Au)^(o)=1.50 and E_(Ni^(2+)//Ni)^(o)=0.25V Reason: Emf of the cell =E_("cathode")^(o)-E_("anode")^(o)

Assertion [Ni (CO)_(4)] has longer C-O bond lengththan the same in [Cr(CO)_(5) NH_(3)] Reason There is greater extent of d pi - rho pi back bonding in [Ni (CO)_(4)] than in [Cr (CO)_(5) NH_(3)]

Assertion. NF_(3) is weaker ligand than N(CN_(3))_(3). Reason. NF_(3) ionizes to give F^(-) ions in aqueous solution.

Assertion : Network polymers are thermosetting. Reson : Network polymers have high molecular mass.

Assertion: Neoprene can be further hardened by heating in presence of sulphur. Reason : Neoprene contains allylic double bonds which help in introducing sulphur bridges between different polymer chains.

Assertion: Neopenty alcohol on treatment with HCl gives neopentyl chloride. Reason: Neopentyl is a tertiary alcohol.