94420 + Interview Questions in Chemistry in Class 12

1.	Assertion: For the 2NH_(3(g))hArr N_(2(g))+3H_(2(g)), the unit of K_(p) will be at. Reason: Unit of K_(p) is (atm)^(Deltan),
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 assertion is false but reason is true.

Discussion

2.	Assertion: For measuring resistance of an ionic solution, an AC source is used. Reason: Concentration of ionic solution will change if DC source is used.
Answer» Both ASSERTION and REASON are TRUE and the reason is the CORRECT EXPLANATION of assertion. Both assertion and reason are true and the reason is not the correct explanation of assertion. Assertion is true but the reason is false. Both assertion and reason are false. Answer :A

Discussion

3.	Assertion : For measuring resistance of an ionic solution an AC source is used. Reason : Concentration of ionic solution will change if DC source is used.
Answer» Both assertion and reason are TRUE and the reason is the correct EXPLANATION of assertion. Both assertion and reason are true and the reason is not the correct explanation of assertion. Assertion is true but the reason is false. Both assertion and reason are false. Solution :DC current can CHANGE the composition of ELECTROLYTIC solution.

Discussion

4.	Assertion : For maximum stability N/P ratio must be equal to 1 Reason : Loss of alpha - beta - particles has no role in N/P ratio
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 :Loss of `ALPHA or beta-`particle is to change N/P ratio so that it lies with the in the stability belt. Loss of `alpha-`particles INCREASES N/P ratio while loss of `beta-` particle DECREASES N/P ratio

Discussion

5.	Assertion : For measurement of specific resistance of a metallic wire, AC current is used. Reason : This is to prevent electrolysis
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

6.	Assertion : For making rubber synthetically , isoprenemolecules are polymerised. Reason : Neoprene (a plymer of chloroprene) is a synthetic rubber.
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 wrong statement and reason is correct statement. Solution :Correct assertion : POLYMERIZATION of isoprene in the LABORATORY GIVES all trans-polyisoprene ALSO called gutt-percha.

Discussion

7.	Assertion : For a strong electrolyte, higher the concentration, lower the molar conductivity Reason : The plot ofwedge_(m)V_(s)sqrt(C) is not linear one for a weak electrolyte
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 :B

Discussion

8.	Assertion :- For an isolated system q is zero. Reason :- In an isolated system change in U and V is zero.
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 :C

Discussion

9.	Assertion: For a reaction A(g) rarr B(g) -r_(A) = 2.5 P_(A) at 400 K r_(A) = 2.5 P_(A) at 600 K activation energy is 4135 J//"mol". Reason: Since for any reaction, values of rate constant at two different temp is same therefore activation energy of the reaction is zero.
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 assertion is false but reason is true. Solution :`-r_(A) = [2.5 R(400)]C_(A)`(at `400 K`) `-r_(A) = [2.5 R(600)]C_(A)`(at `600 K`) `log((6)/(4)) = (E_(a))/(2.303 R) [(1)/(400) - (1)/(600)]` `E_(a) = 4135` So Assertion and Reason both are correct and reason is not the correct explanation.

Discussion

10.	Assertion: For a reaction H_(2(g))+I_(2(g))hArr2HI_((g)) if the volume of vessel is reduced to half of its original volume, equlibrium constant will be doubled. Reason: According to Le-Chatelier principle, reaction shifts in a direction that tends to undo the effect of the stress.
Answer» If both assertion and REASON are treu and the reason is the CORRECT EXPLANATION of the assertion. If both assertion and reason are TRUE but REAOSN is not the correct explanation of the assertion. If assertion is true but reason is false. If the assertion and reason both are false.

Discussion

11.	Assertion: For a gaseouss reaction, xA+yBhArr1C+mD,K_(p)=K_(C). Reason: Concentration of gaseous reactant is taken to be unity.
Answer» If both assertion and REASON are true and the reason is the correct EXPLANATION of the assertion. If both ASSERTIN and reason are true but reason is not the correct explanation of the assertion. If assertin is true but reason is FALSE. If the assertion and reason both are false. Answer :D

Discussion

12.	Assertion. For a first order reaction, the concentration of the reactant decreases exponentially with time. Reason. Rate of reaction at any time depends upon the concentration of the reactant at that time.
Answer» If both assertion and reason are true and reason is the true EXPLANATION of the assertion. If both assertion and reason AE 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 explanation. `[A]=[A]_(0)E^(-kt)`.

Discussion

13.	Assertion: For a first order reaction, the concentration of the reactant decreases exponentially with time. Reason: Rate of reaction at any time depend upon the concentration of reactant at that time.
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 assertion is false but reason is true. Solution :Correct explanation. `[A] = [A]_(0)E^(-kt)`

Discussion

14.	Assertion: Following reaction takes place according to Antimarkownikov's rule. CF_(3)CH=CH_(2)+HCltoCF_(3)CH_(2)CH_(2)Cl Reason: Primary carboction is the intermediate.
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: FLUORINE ATOMS have strong -I effect and FAVOUR electrophile attack.

Discussion

15.	Assertion: For a cell reaction Zn_((s))+Cu_((aq))^(2+)toZn_((aq))^(2+)+Cu_((s)), at the equilibrium voltmeter gives zero reading. Reason: At the equilibrium, there is no change in the concentration of Cu^(2+) and Zn^(2+) ions.
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 :A

Discussion

16.	Assertion: Fluoroacetic acid is stronger acid than bromoacetic acid. Reason: Acidity depends upon the electron withdrawing effect of the fluorine and chlorine.
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 assertioin and reason both are false. Solution :The LARGER the electron withdrawing INDUCTIVE effect the greater is the ACIDITY.

Discussion

17.	Assertion: First four aliphatic monocarboxylic acids are colourless. Reason: Carboxylic acids with more than five carbon atoms are insoluble in water.
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 assertioin and reason both are false. Solution :Carboxylic acids `(RCOOH)` dissolves in water due to HYDROGEN bonding between H-atom of -COOH group and O-atom of water. As alkyl portion R-is non polar and lyophobic, this effect predominates as -R gets larger (over five carbon ATOMS).

Discussion

18.	Assertion: First electron affinity of all elements is positive. Reason: Successive electron affinity of all elements is negative.
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 :D

Discussion

19.	Assertion : FeOis basicin charcter Reason: Oxidesof transitionmetalsare basicwhenmetalis inloweroxidationstate.
Answer» Bothassertionand reasontrueand REASONIS thecorrectexplanationof thehassertion . Bothassertion andreasonare truebut reasonis NOTTHE correctexplanationof THEASSERTION . ASSERTION istruereason is FALSE . Bothassertionand reasonare false. Answer :A

Discussion

20.	Assertion: FeSO_(4) and Fe_(2)(SO_(4))_(3) undergoes intramolecular redox reaction on thermal decomposition Reason: Both salts give brown solid of Fe_(2)O_(3) after decomposition.
Answer» 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 If assertion is false but reason is true If assertion is true but the reason is false Answer :D

Discussion

21.	Assertion : Ferricyanide ion oxidises H_(2)O_(2) to H_(2)O. Reason : Oxidation product of H_(2)O_(2) is O_(2).
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. Solution :both are wrong.

Discussion

22.	Assertion : Fehling solution does not oxidise benzaldehyde to benzoic acid. Reason : Fehling solution is a alkaline solution of copper sulphate containing Rochelle salt.
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 :B

Discussion

23.	Assertion : Fehling reagent is a test for all aliphatic aldehydes. Reason : Aliphatic aldehydes can be easily oxidised even with mild oxidising agents.
Answer» If both ASSERTION and REASON are CORRECT and reason is correct EXPLANATION for assertion. If both assertion and reason are correct and reason is not correct explanation for assertion. If assertion is correct but reason is incorrect. If assertion as WELL as reason are both incorrect. Solution :Reason is the correct explanation for assertion.

Discussion

24.	Assertion: [Fe(EDTA)]^(-) complex is octahedral in shape. Reason: EDTA is a hexadentate ligand and undergoing sp^(3)d^(2) hybridisation.
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 but reason is not the correct explanation of assertion Solution :EDTA is HEXADENTATE ligand. When it forms complex with a metal cation, the HYBRIDISATION of central atom will be `d^(2)sp^(3)`

Discussion

25.	Assertion (A) [Fe(CN)_(6)]^(3-) ion shows magnetic moment corresponding to two unpaired electrons. Reason (R) Because it has d^(2)sp^(3) type hybridisation.
Answer» Both assertion and reason are True, and reason is the CORRECT EXPLANATION of the assertion. Both assertion and reason are True, but reason is not the correct explanation of the assertion Assertion is True, but reason is fasle. Bothassertion and reason are FALSE ANSWER :(d)

Discussion

26.	Assertion: [Fe(CN)_6]^(3-)is weakly paramagnetic while [Fe(CN)_6]^(4-)is diamagnetic Reason:Both [Fe(CN)_6]^(3-)and [Fe(CN)_6]^(4-) involve d^2sp^3 hybridisation. In [Fe(CN)_6]^(3-)singly occupied d-orbital is available but in [Fe(CN)_6]^(4-)paired electrons are present
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 :A

Discussion

27.	Assertion : [Fe(CN)_(6)]^(3-) ion shows magnetic moment corresponding to two unpaired electrons. Reason : Because it has d^(2)sp^(3) type hybridisation.
Answer» Solution :Correct assertion. `[FE(CN)_(6)]^(3-)` has `Fe^(3+) (3d^(5)=3d^(1)3d^(1)3d^(1)3d^(1)3d^(1))`. In PRESENCE of `CN^(-)`, electron PAIR upto give `3d^(2)3d^(2)3d^(1)3d^(0)3d^(0)`. HYBRIDIZATION is `d^(2)sp^(3)`. Thus, it will have magnetic moment corresponding to one electron.

Discussion

28.	Assertion: FeCI_(3) reacts with KCNS to give bloodredcolour . Reason: FeCI_(3)reactswith KCNS to formpotassiumferro-ferricyanide .
Answer» bothassertionand reasonare truereasonis thecorrectexplanationof THEASSERTION . bothassertinandreasonare truebutreasonis notcorrectexplanationof theassertion Assertionis truebutreasonis FALSE Bothassertionand reasonare false. Answer :C

Discussion

29.	Assertion. Fe^(3+) can be used for coagulation of As_(2)S_(3) sol. Reason. Fe^(3+) reacts with As_(2)S_(3) to give Fe_(2)S_(3).
Answer» If both assertion and reason are ture, and reason is the trure 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 false. Solution :CORRECT R.`Fe^(3+)` neutralize the CHARGE on the negatively charged `As_(2)S_(3)` PARTICLES.

Discussion

30.	Assertion : Fe^(3+)can be used for coagulation of As_2S_3 sol. Reason: Fe^(3+)reacts with As_2 S_3 to give Fe_2S_3 .
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 :C

Discussion

31.	Assertion. F_(2) has high reactivity. Reason. F-F bond has low bond dissociation enthalpy.
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

32.	Assertion: F^(-) ion has highest hydrated radius among the other halide ions. Reason: Ionic radius of F^(-) is smallest in the periodic table.
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

33.	Assertion: F atom has less electron afffinity than Cl atom. Reason: Additional electrons are repelled more strongly by 3p electrons in Cl atom than by 2p electrons in F atom.
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 Solution :Due to small size of F atom added electron is REPLACED more STRONGLY by 2P electrons than in CASE of Cl atom.

Discussion

34.	Assertion. F-F bond in F_(2) molecule is weak. Reason. F atom is small in size.
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. Due to small size, the lone pairs of electrons on F-atoms repel the bond pair between F-atoms. Therefore, F-F bond in `F_(2)` molecule is weak.

Discussion

35.	Assertion : Except glycine all other amino acide are optiocallyinactive. Reason : Other amino acids do not have chiral carbon.
Answer» SOLUTION : Both {A) and (R) are FALSE

Discussion

36.	Assertion : Extraction of iron metal from iron oxide ore is carried out by heating with coke. Reason : The reaction Fe_(2)O_(3)(s)rarrFe(s)+(3)/(2)O_(2)(g) is a spontaneous process.
Answer» If both assertion and REASON are true and the reason is not thecorrect 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. It the assertion and reason both are false. Solution :Extraction of iron metal from iron oxide ore is carried out by heating with coke and flux (calcium carbonate). Flux is a slag forming substance. It converts infusible impurities into fusible slag. The REACTION : `Fe_(2)O_(3(s))rarrFe_((s))+3//2O_(2(g))` is not aspontaneous process `Fe_(2)O_(3)` is converted to `FeO` at about `400^(@)C,FeO` is converted to FE at about `800^(@)C -1000^(@)C,`

Discussion

37.	Assertion : Ethyl slcohol and water form maximum boiling azetrope. Reason : Attractive forces in solution tend to increase.
Answer» If both assertion are reason are correct and reason is correct explanation for assertion. If both assertion and reason are CORRCT but reason is not correct explanation for assertion. If assertion is corrct but reason is incorrect. If assertion and reason both are incrrect. Solution :Correct Assertion. Ethyl alcohol and WATER from minimum BOILING azetrope. Correct Reason. Attractive forces in solution tend to DECREASE.

Discussion

38.	Assertion: Ethyl chloride is more reactive than vinyl chloride towards nucleophilic substitution. Reason: Vinyl group is electron donating in nature.
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 reacton. In vinly CHLORIDE `C_Cl` BOND acquires a partial double bond character due to conjugation and its cleavage is difficult.

Discussion

39.	Assertion: Ethyl bromide reacts with alcoholic silver cyanide solution to give ethyl carbylamine as the major product. Reason: CN^(-) ion is an ambident nucleophile.
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 the correct explanation for ASSETION.

Discussion

40.	Assertion : Ethyl benzene and methyl benzene both are oxidised to benzoic acid with acidified KMnO_(4). Reason : The entire side chain of aromatic carboxylic acid is oxidised to COOH irrespective of the length of the side chain
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

41.	Assertion : Ethers have specific dipole moment values. Reason : The C-O bond is of polar nature.
Answer» BothA and B are TRUE and R is the correct explanation of A. A is true but R is FALSE. A is False but R is True. Both A and R are false. Solution :ETHERS are bent molecules and the polarities of bonds donot cancel out.

Discussion

42.	Assertion : Ethers behave as bases in the presence of mineral Reason : Due to the presence of lone electron pair on the oxygen atom.
Answer» BOTHA and B are true and R is the CORRECT explanation of A. A is true but R is False. A is False but R is True. Both A and R are false. SOLUTION :REASON is correct explanation for assertion.

Discussion

43.	Assertion : Ethers behave as bases in the presence of mineral acids. Reason : Due to the presence of lone electrons pair on the oxygen atom.
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 for assertion. If assertion is correct but reason is INCORRECT. If both assertion and reason are incorrect. SOLUTION :Reason is the corect explanation for assertion .

Discussion

44.	Assertion :Etherates are coordinates complexes of ethers with Lewis acids. Reason : Ethers are easily cleaved by mineral acids such as HCl and H_(2)SO_(4) at 373 K.
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 :ETHERS being Lewis bases from etherates with Lewis ACIDS.

Discussion

45.	Assertion: Ethanol is a weaker aciid than phenol. Reason: Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
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. Assertion is wrong statement but reason is correct statement. Solution :Correct reason. Phenoxide ION is stabilized by RESONANCE but there is no such stabilization in ethanol.

Discussion

46.	Assertion : Etard reaction helps to stop the oxidation of toluene at the aldehydestage. Reason : Chromyl chloride oxidises methyl group to a chromium complex, which on hydrolysis gives corresponding benzaldehyde.
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. Answer :A

Discussion

47.	Assertion: Equlibrium constant has meaning only when the corresponding balanced chemical equation is given. Reason: Its value changes for the new equation obtained by multiplying or dividing the original equation by a number
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 assertion is false but reason is true. ANSWER :A

Discussion

48.	Assertion : Equivalent weight of Cu in CuO is 63.6 and in Cu_(2)O 31.8. Reason : Equivalent weight of an element =("Atomic weight of the element")/("Valency of the element")
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 assertion is false but reason is true. Solution :Equivalent WT. of Cu in `CuO=63.6/2=("At. Wt.")/("VALENCY")=31.8` Equivalent wt. of Cu in `Cu_(2)O=63.6/1=63.6` (Valency of `Cu=1`).

Discussion

49.	Assertion. Equivalent weight of a base=("Molecular weight")/("Acidity") Reason. Acidity is the number of replaceable hydrogen atoms in one molecule of the base.
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 assetion. If assertion is true, but reason if false If both assertion and reason are false. Solution :Correct R. Acidity is the number of replaceable hydroxyl groups in ONE MOLECULE of the base.

Discussion

50.	Assertion. Equivalent mass of KMnO_(4) is same in the neutral as well alkalinemedium. Reason. The product formed in both cases in MnO_(2).
Answer» SOLUTION :R is the CORRECT EXPLANATION of A.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Assertion: For the 2NH_(3(g))hArr N_(2(g))+3H_(2(g)), the unit of K_(p) will be at. Reason: Unit of K_(p) is (atm)^(Deltan),

Assertion: For measuring resistance of an ionic solution, an AC source is used. Reason: Concentration of ionic solution will change if DC source is used.

Assertion : For measuring resistance of an ionic solution an AC source is used. Reason : Concentration of ionic solution will change if DC source is used.

Assertion : For maximum stability N/P ratio must be equal to 1 Reason : Loss of alpha - beta - particles has no role in N/P ratio

Assertion : For measurement of specific resistance of a metallic wire, AC current is used. Reason : This is to prevent electrolysis

Assertion : For making rubber synthetically , isoprenemolecules are polymerised. Reason : Neoprene (a plymer of chloroprene) is a synthetic rubber.

Assertion : For a strong electrolyte, higher the concentration, lower the molar conductivity Reason : The plot ofwedge_(m)V_(s)sqrt(C) is not linear one for a weak electrolyte

Assertion :- For an isolated system q is zero. Reason :- In an isolated system change in U and V is zero.

Assertion: For a reaction A(g) rarr B(g) -r_(A) = 2.5 P_(A) at 400 K r_(A) = 2.5 P_(A) at 600 K activation energy is 4135 J//"mol". Reason: Since for any reaction, values of rate constant at two different temp is same therefore activation energy of the reaction is zero.

Assertion: For a reaction H_(2(g))+I_(2(g))hArr2HI_((g)) if the volume of vessel is reduced to half of its original volume, equlibrium constant will be doubled. Reason: According to Le-Chatelier principle, reaction shifts in a direction that tends to undo the effect of the stress.

Assertion: For a gaseouss reaction, xA+yBhArr1C+mD,K_(p)=K_(C). Reason: Concentration of gaseous reactant is taken to be unity.

Assertion. For a first order reaction, the concentration of the reactant decreases exponentially with time. Reason. Rate of reaction at any time depends upon the concentration of the reactant at that time.

Assertion: For a first order reaction, the concentration of the reactant decreases exponentially with time. Reason: Rate of reaction at any time depend upon the concentration of reactant at that time.

Assertion: Following reaction takes place according to Antimarkownikov's rule. CF_(3)CH=CH_(2)+HCltoCF_(3)CH_(2)CH_(2)Cl Reason: Primary carboction is the intermediate.

Assertion: For a cell reaction Zn_((s))+Cu_((aq))^(2+)toZn_((aq))^(2+)+Cu_((s)), at the equilibrium voltmeter gives zero reading. Reason: At the equilibrium, there is no change in the concentration of Cu^(2+) and Zn^(2+) ions.

Assertion: Fluoroacetic acid is stronger acid than bromoacetic acid. Reason: Acidity depends upon the electron withdrawing effect of the fluorine and chlorine.

Assertion: First four aliphatic monocarboxylic acids are colourless. Reason: Carboxylic acids with more than five carbon atoms are insoluble in water.

Assertion: First electron affinity of all elements is positive. Reason: Successive electron affinity of all elements is negative.

Assertion : FeOis basicin charcter Reason: Oxidesof transitionmetalsare basicwhenmetalis inloweroxidationstate.

Assertion: FeSO_(4) and Fe_(2)(SO_(4))_(3) undergoes intramolecular redox reaction on thermal decomposition Reason: Both salts give brown solid of Fe_(2)O_(3) after decomposition.

Assertion : Ferricyanide ion oxidises H_(2)O_(2) to H_(2)O. Reason : Oxidation product of H_(2)O_(2) is O_(2).

Assertion : Fehling solution does not oxidise benzaldehyde to benzoic acid. Reason : Fehling solution is a alkaline solution of copper sulphate containing Rochelle salt.

Assertion : Fehling reagent is a test for all aliphatic aldehydes. Reason : Aliphatic aldehydes can be easily oxidised even with mild oxidising agents.

Assertion: [Fe(EDTA)]^(-) complex is octahedral in shape. Reason: EDTA is a hexadentate ligand and undergoing sp^(3)d^(2) hybridisation.

Assertion (A) [Fe(CN)_(6)]^(3-) ion shows magnetic moment corresponding to two unpaired electrons. Reason (R) Because it has d^(2)sp^(3) type hybridisation.

Assertion: [Fe(CN)_6]^(3-)is weakly paramagnetic while [Fe(CN)_6]^(4-)is diamagnetic Reason:Both [Fe(CN)_6]^(3-)and [Fe(CN)_6]^(4-) involve d^2sp^3 hybridisation. In [Fe(CN)_6]^(3-)singly occupied d-orbital is available but in [Fe(CN)_6]^(4-)paired electrons are present

Assertion : [Fe(CN)_(6)]^(3-) ion shows magnetic moment corresponding to two unpaired electrons. Reason : Because it has d^(2)sp^(3) type hybridisation.

Assertion: FeCI_(3) reacts with KCNS to give bloodredcolour . Reason: FeCI_(3)reactswith KCNS to formpotassiumferro-ferricyanide .

Assertion. Fe^(3+) can be used for coagulation of As_(2)S_(3) sol. Reason. Fe^(3+) reacts with As_(2)S_(3) to give Fe_(2)S_(3).

Assertion : Fe^(3+)can be used for coagulation of As_2S_3 sol. Reason: Fe^(3+)reacts with As_2 S_3 to give Fe_2S_3 .

Assertion. F_(2) has high reactivity. Reason. F-F bond has low bond dissociation enthalpy.

Assertion: F^(-) ion has highest hydrated radius among the other halide ions. Reason: Ionic radius of F^(-) is smallest in the periodic table.

Assertion: F atom has less electron afffinity than Cl atom. Reason: Additional electrons are repelled more strongly by 3p electrons in Cl atom than by 2p electrons in F atom.

Assertion. F-F bond in F_(2) molecule is weak. Reason. F atom is small in size.

Assertion : Except glycine all other amino acide are optiocallyinactive. Reason : Other amino acids do not have chiral carbon.

Assertion : Extraction of iron metal from iron oxide ore is carried out by heating with coke. Reason : The reaction Fe_(2)O_(3)(s)rarrFe(s)+(3)/(2)O_(2)(g) is a spontaneous process.

Assertion : Ethyl slcohol and water form maximum boiling azetrope. Reason : Attractive forces in solution tend to increase.

Assertion: Ethyl chloride is more reactive than vinyl chloride towards nucleophilic substitution. Reason: Vinyl group is electron donating in nature.

Assertion: Ethyl bromide reacts with alcoholic silver cyanide solution to give ethyl carbylamine as the major product. Reason: CN^(-) ion is an ambident nucleophile.

Assertion : Ethyl benzene and methyl benzene both are oxidised to benzoic acid with acidified KMnO_(4). Reason : The entire side chain of aromatic carboxylic acid is oxidised to COOH irrespective of the length of the side chain

Assertion : Ethers have specific dipole moment values. Reason : The C-O bond is of polar nature.

Assertion : Ethers behave as bases in the presence of mineral Reason : Due to the presence of lone electron pair on the oxygen atom.

Assertion : Ethers behave as bases in the presence of mineral acids. Reason : Due to the presence of lone electrons pair on the oxygen atom.

Assertion :Etherates are coordinates complexes of ethers with Lewis acids. Reason : Ethers are easily cleaved by mineral acids such as HCl and H_(2)SO_(4) at 373 K.

Assertion: Ethanol is a weaker aciid than phenol. Reason: Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.

Assertion : Etard reaction helps to stop the oxidation of toluene at the aldehydestage. Reason : Chromyl chloride oxidises methyl group to a chromium complex, which on hydrolysis gives corresponding benzaldehyde.

Assertion: Equlibrium constant has meaning only when the corresponding balanced chemical equation is given. Reason: Its value changes for the new equation obtained by multiplying or dividing the original equation by a number

Assertion : Equivalent weight of Cu in CuO is 63.6 and in Cu_(2)O 31.8. Reason : Equivalent weight of an element =("Atomic weight of the element")/("Valency of the element")

Assertion. Equivalent weight of a base=("Molecular weight")/("Acidity") Reason. Acidity is the number of replaceable hydrogen atoms in one molecule of the base.

Assertion. Equivalent mass of KMnO_(4) is same in the neutral as well alkalinemedium. Reason. The product formed in both cases in MnO_(2).