94420 + Interview Questions in Chemistry in Class 12

1.	Assertion (A): Hydrolysis of XeF_4 and XeF_6 with water gives XeO_3. Reason (R) : The structures of the three Xenon fluorides can be deduced from VSEPR.
Answer» Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct EXPLANATION of the Assertion (A) Both Assertion (A) and Renson (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A) Assertion (A) is correct, but Reason (R) is incorrect STATEMENT. Assertion (A) is incorrect, but Reason (R) is correct statement. Answer :B

Discussion

2.	Assertion (A) : Hydrolysis of ethyl acetate in acidic medium is a first order reaction. Reaction (R ) : For a complex reaction, order is given by the slowest step.
Answer» Both ASSERTION (A) and Reason (R ) are CORRECT statements, and Reason (R ) is the correct explanation of the Assertion (A). Both Assertion (A) and Reason (R ) are correct statements, but Reason (R ) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R ) is INCORRECT statement. Assertion (A) is incorrect, but Reason (R ) is correct statement. Answer :A

Discussion

3.	Assertion (A) : Hydrolysis of ethyl acetate in the presence of acid is a first order reaction whereas in the presence of alkali, it is a second order reaction. Reason (R ) : Acid only acts as catalyst whereas alkali acts as one of the reactants.
Answer» Both ASSERTION (A) and Reason (R ) are CORRECT STATEMENTS, and Reason (R ) is the correct explanation of the Assertion (A). Both Assertion (A) and Reason (R ) are correct statements, but Reason (R ) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R ) is INCORRECT statement. Assertion (A) is incorrect, but Reason (R ) is correct statement. Answer :A

Discussion

4.	Assertion (A) : Hydrolysis of an ester follows first order kinetics. Reason (R ) : Concentration of water remains nearly constant during the course of the reaction.
Answer» Both Assertion (A) and Reason (R) are CORRECT STATEMENTS, and Reason (R) is the correct EXPLANATION of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R) is incorrect statement. Assertion (A) is incorrect, but Reason (R) is correct statement. Answer :A

Discussion

5.	Assertion (A) : Hydrolysis of (-)-2-bromooctane proceeds with inversion of configuration. Reason (R ) : This reaction proceeds through the formation of a carbocation.
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 :`S_(N)2` reaction passes through pentavalent transition staste of a carbon.

Discussion

6.	Assertion (A): Hydrogenation of vegetable oil in the presence of finely divided Ni produces vegetable ghee. Reason (R) : Ammonia is produced by the reaction between N_2 and H_2 in the presence of Ni in Ostwald process.
Answer» Both Assertion (A) and REASON (R) are CORRECT STATEMENTS, and Reason (R) is the correct EXPLANATION of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A) Assertion (A) is correct, but Reason (R) is incorrect STATEMENT. Assertion (A) is incorrect, but Reason (R) is correct statement Answer :C

Discussion

7.	Assertion (A) : Hydrolysis of (-)-2-bromooctane proceeds with inversion of configuration. Reason (R) : This reaction proceeds through the formation of a carbocation.
Answer» (A) and (R) both are correct statement and (R) is correct explanation for (A) (A) and (R) both are correct statement but (R) is not correct explanation for (A) (A) is correct statement but (R) is wrong statement. (A) and (R) both are incorrect statement. Solution :HINT: Correct reason: Reaction proceeds by `S_(N)2` MECHANISM.

Discussion

8.	Assertion (A) : Hydrogen iodide decomposes at 400^(@)C while hydrogen fluoride and hyrogen chloride are stable at this temperature. Reason (R ) : Thermal stability of hydrogen halides decreases from fluoride to iodide.
Answer» A are R are CORRECT and R EXPLAINS A A and R are correct but doesn't explains A A is correct but R is wrong A is wrongbut R is correct Solution :A are R are correct and R explains A

Discussion

9.	Assertion (A) : Higher carboxylic acids are practically insoluble in water. Reason (R) : Carboxylic acids dissociate in water to give resonance stabilised carboxylic anions and hydronium ion.
Answer» Both Assertion (A) and Reason (R) are correct STATEMENTS, and Reason (R) is the correct explanation of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R) is INCORRECT STATEMENT. Assertion (A) is incorrect, but Reason (R) is correct statement Answer :B

Discussion

10.	Assertion (A) : Henry was the first to give a quantitative relation between pressure andsolubility of a gas.Reason (R) : Solubility of a gas in liquids increases with rise in temperature.
Answer» Both Assertion (A) and REASON (R) are correct statements, and Reason (R) is the correct explanationof the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanationof the Assertion (A). Assertion (A) is correct, but Reason (R) is INCORRECT STATEMENT, Assertion (A) is incorrect, but Reason (R) is correct statement. Answer :C

Discussion

11.	Assertion (A) : Helium is used in diving apparatus. Reason (R) : Argon is used in discharge tubes and fluorescent bulbs for advertisement display.
Answer» Both ASSERTION (A) and Reason (R) are CORRECT statements, and Reason (R) is the correct explanation of the Assertion (A) Both Assertion (A) and Renson (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A) Assertion (A) is correct, but Reason (R) is INCORRECT STATEMENT. Assertion (A) is incorrect, but Reason (R) is correct statement. Answer :C

Discussion

12.	Assertion (A) : Haemoglobin, the red pigment of blood which acts as an oxygen carrier is a coordination compound. Reason (R) : The excess of copper is removed by the chelating ligand desferrioxime B.
Answer» Both ASSERTION (A) and REASON (R) are correct STATEMENTS, and Reason (R) is the correct EXPLATION of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explation of the Assertion (A). Assertion (A) is correct, but Reason (R) is incorrect statement. Assertion (A) is incorrect, but Reason (R) is correct statement. Answer :C

Discussion

13.	Assertion (A) : Halothane is used as an anaesthetic during surgery.Reason (R) : The deficiency of iodine in our body causes goitre.
Answer» Both ASSERTION (A) and Resort (R) are CORRECT statements, quid Reason (R) is the correct explanation of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, BRIT Reason (R) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R) is incorrect statement. Assertion (A) is incorrect, but Renson (R) is correct statement. Answer :b

Discussion

14.	Assertion (A): Glycine must be taken through diet. Reason (R) : It is an essential amino acid.
Answer» Assertion and reason both are correct STATEMENTS and reason explains the assertion. Both assertion and reason are wrong statements. Assertion is correct STATEMENT and reason is wrong statement. Assertion is wrong statement and reason is correct statement. SOLUTION :Both assertion and reason are wrong statements. Glycine is non-essential amino ACID.

Discussion

15.	Assertion (A) : Glycinemust betaken through diet . Reason (R) : Itis an essential amino acid .
Answer» Both A and Rare correctand R EXPLAINS A . Both A and R are correctbut R does notexplainA . A is wrongbut Ris wrong . BOTHA and Rare wrong Answer :D

Discussion

16.	Assertion (A) : Glucose reacts with hydroxylamine to form an axime and also adds a molecule of hydrogen cyanide to give cyanohydrin . Reason (R ): The carbony group is present in the open chain structure of glucose .
Answer» Both Assertion (a) And REASON (R )are CORRECT Statement . And Reason (R )is the correct explanation of the Assertion (A) Both Assertion (A) and Reason (R ) are correct statement , bbut Reason (R ) is not the correct expanation of the Assertion (A) Assertion (A) is correct , but Reason (R ) is correct statement . Assertion (A ) is incorrect but Reason (R ) Is correct statement. ANSWER :A

Discussion

17.	Assertion (A): Glucose is found to exist in two crystalline forms which are known as alphaand beta Reason (R) :The formula for aspartic acid is :H_(2)N - underset(CH_(3))underset(\|)overset(COOH)overset(\|)(C) - H
Answer» Both ASSERTION (A) and Reason (R) are CORRECT STATEMENTAND Reason (R) is the correctexplanationof the Assertion (A). Both Assertion (A) and Reason (R) are correctstatements, but Reason(R) is NOTTHE CORRECTEXPLANATION of the Assertion (A). Assertion (A) is correct, but Reason(R) is incorrect statement Assertion (A) is incorrect , but Reason (R) is correct statement. Answer :C

Discussion

18.	Assertion (A) : Glucose is called bloondsugar. Reason (R) :Humanbloodcontains about 100 mg/dlof glucose henceit is calledbloodsugar.
Answer» BothAand RARE CORRECT and Ris the CORRECTEXPLANATION ofA . BothA and Rare correctbutR is notthe correct explanationof A A is correctbut R is wrong A is wrongbut Ris correct . Answer :A

Discussion

19.	Assertion (A) :Glucose iscalledaldohexoseaswellasdextrose. Reason (R) : Glucosecontainan aldehydegroupannd it rotates the planepolarished lightin the clockwise direction.
Answer» BothAand Rare CORRECT and Ris the correctexplanation OFA . BothA and Rare correctbutR is NOTTHE correct explanationof A A is correctbut R is wrong A is wrongbut Ris correct . ANSWER :A

Discussion

20.	Assertion(A) : Glucosecontainsan aldehyde groupand it occupies one endof the carbon chain. Reason (R) : Whenglucoseis oxidisedby brominewater , itgetsoxidised to gluconicacidconfirms theposition of aldehydegroup.
Answer» BothAand Rare correct and RIS the CORRECTEXPLANATION OFA . BothA and Rare correctbutR is NOTTHE correct explanationof A A is correctbut R is wrong A is wrongbut Ris correct . ANSWER :A

Discussion

21.	Assertion (A) : Glucosecontainsoneprimary alcoholgroupat the end ofthe carbon chain. Reason (R) : Whenglucoseis oxidisedagentconc. HNO_(3)it gives glucaricacidproves the presenceof-CH_(2) OH group at one endof carbon chain in glucose .
Answer» BothAand RARE CORRECT and RIS the correctexplanation ofA . BothA and Rare correctbutR is notthe correct EXPLANATIONOF A A is correctbut R is wrong A is wrongbut Ris correct . ANSWER :A

Discussion

22.	Assertion (A) : Glass, rubber and plastics form crystals when their liquids solidify on cooling. Reason (R) : Solids are incompressible and rigid.
Answer» Both Assertion (A) and REASON (R) are correct STATEMENTS, and Reason (R) is the correct EXPLANATION of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R) is INCORRECT statement. Assertion (A) is incorrect, but Reason (R) is correct statement. Answer :D

Discussion

23.	Assertion (A) : Glucoseandmannose are epimers. Reason (R) : sugars differingin configurationat an asymmetriccentre are called epimers.
Answer» BothAand RARE correct and Ris the CORRECTEXPLANATION ofA . BothA and Rare correctbutR is notthe correct EXPLANATIONOF A A is correctbut R is wrong A is wrongbut Ris correct . Answer :A

Discussion

24.	Assertion (A) : Geometrical isomerism exists in homoleptic complexes. Reason (R ) : In homoleptic complexes due to different possible three dimensional spatial arrangements of ligands around the central metal atoms.
Answer» Both A and R are CORRECT and R is the correct explanation of A. Both A and R are correct but R is not the correct explanation of A. A and R are WRONG A is wrong but R is correct Answer :C

Discussion

25.	Assertion (A) :Geometrical isomerism exists in heteropleptic complexes. Reason (R ): In heteroleptic complexes due to different possible three dimensional spatial arrangement of ligands around the central metal atom results in geometrical isomers.
Answer» Both A and R are CORRECT and R is the correct EXPLANATION of A. Both A and R are correct but R is not the correct explanation of A. Both A and R are WRONG A is wrong but R is correct Answer :A

Discussion

26.	Assertion (A): Gases like SO_(2)2, NH_3 and CO_(2)are readily adsorbed. Reason (R) : SO_(2), NH_(3) and CO_(2)are easily liquefiable as have greater van der Waal's forces of attraction and adsorbed readily.
Answer» Both A and R are CORRECT and R is the correct EXPLANATION of A. Both A and R are WRONG. A is correct but R is wrong. A is wrong but R is correct. ANSWER :A

Discussion

27.	Assertion (A) Gabriel phthalimide reaction can be used to prepare aryl and alkyl amines.Reason (R ) Aryl halides have same reactivity as alkyl halides towards nucleophilic substitution reactions.
Answer» If both ASSERTION ANDREASON are TRUE and Reason is 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 and false. Answer :D

Discussion

28.	Assertion (A) : Gabriel synthesis is used for the preparation of primary amines. Reason (R) : In Hoffmann bromamide, the amine obtained contains one carbon atom more than the amide.
Answer» Both Assertion (A) and Reason (R) are CORRECT statements, and Reason (R) is the correct explanation of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R) is INCORRECT statement. Assertion (A) is incorrect, but Reason (R) is correct statement. Answer :C

Discussion

29.	Assertion (A): Fullerene has aromatic character. Reason(R):Some of the fullernes have sigma- bonds and delocalised pi- bonds.
Answer» (a) A and R are CORRECT and R EXPLAINS A. (B) A and R are correct and R not explains A. (c) A is correct but R is WRONG. (d) A is wrong but R is correct. Answer :A

Discussion

30.	Assertion (A) : For the preparation of aldehydes on industrial scale, alcohol vapours are passed over heavy metal catalysts (Ag or Cu). Reason (R) : Ozonolysis of alkenes followed by reaction with Zn dust and water gives aldehydes.
Answer» Both ASSERTION (A) and Reason (R) are CORRECT statements, and Reason (R) is the correct EXPLANATION of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R) is incorrect statement. Assertion (A) is incorrect, but Reason (R) is correct statement Answer :B

Discussion

31.	Assertion (A) : Fructoseis calledlevuloseand keto hexose . Reason (R): Fructosecontainsa ketone groupand fructose rotates the planepolarised lightin anticlockwisedirection .
Answer» Both A and Rarewrong Both A and RARE CORRECTAND RIS thecorrectexplanationof A . A is wrongbut Ris correct A is correctbut R is wrong . Answer :B

Discussion

32.	Assertion (A) : For making rubber synthetically,isoprene molecules are polymerized. Reason (R) : Neoprene (a polymer of chloroprene) is a synthetic rubber.
Answer» ASSERTION and reason both are CORRECT STATEMENTS but reason does not EXPLAIN assertion. Assertion and reason both are correct statements and reason explain the assertion. Both assertion and reason are wrong statements. Assertion is wrong statement and reason is correct statement. Solution :Assertion is wrong statement and reason is correct statement. Correct assertion is, neoprene is a naturally OCCURING polymer of chloroprene prepared by polymerization of 2-chloro butadiene

Discussion

33.	Assertion (A) : For ideal solution Delta H_(mix) and Delta V_(mix) are always zero.Reason (R ) : Intermolecular attractive forces in solution is same as liquid.
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 and reason both are INCORRECT statements. ANSWER :A

Discussion

34.	Assertion (A) : For a reaction, with rise in temperature by 10^(@)C, the rate constant is nearly doubled. Reason (R ) : A catalyst changes the equilibrium point of the reaction.
Answer» Both ASSERTION (A) and REASON (R ) are CORRECT STATEMENTS, and Reason (R ) is the correct explanation of the Assertion (A). Both Assertion (A) and Reason (R ) are correct statements, but Reason (R ) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R ) is INCORRECT statement. Assertion (A) is incorrect, but Reason (R ) is correct statement. Answer :C

Discussion

35.	Assertion (A): Fluorine is most reactive element among the halogens. Reason(R):Fluorine has minimum bond dissociation energy.
Answer» (a) A and R are correct and R EXPLAINS A. (b) A and R are correct and R not explains A. (c) A is correct but R is WRONG. (d) A is wrong but R is correct. Answer :A

Discussion

36.	Assertion (A) : [Fe(CN)_(6)]^(3-) is paramagnetic Reason (R ) : In [Fe(CN)_(6)]^(3-), there is one unpaired electron and so it is paramagnetic
Answer» Both A and R are CORRECT and R is the correct EXPLANATION of A. Both A and R are correct but R is not the correct explanation of A. Both A and R are wrong A is correct but R is wrong Answer :A

Discussion

37.	Assertion (A) : F-F bond in F_(2) molecule is weak. Reason (R ) : F atom is small in size.
Answer» Both Assertion (A) and REASON (R ) are correct statements, and Reason (R ) is the correct EXPLANATION of the Assertion (A). Both Assertion (A) and Reason (R ) are correct statements, but Reason (R ) is not the correct explanation of the Asseriton (A). Assertion (A) is correct, but Reason (R ) is INCORRECT statement. Assertion (A) is incorrect, but Reason (R ) is correct statement. Answer :A

Discussion

38.	Assertion (A) : F_2 is a strong oxidising agent. Reason (R ) : Electron gain enthalpy of fluorine is less negative.
Answer» Both ASSERTION (A) and REASON (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R) is INCORRECT statement. Assertion (A) is incorrect, but Reason (R) is correct statement. Answer :B

Discussion

39.	Assertion (A) : Expect glyicineall otheramino acidsare optically active. Reason (R) : Glycine does notcontainchiralatom whereas in all otheramino acidshave chiral carbon atom.
Answer» BothA and Rare WRONG A is correctbut Ris wrong BothAand Rare CORRECTAND Ris the CORRECTEXPLANATION of A . BothA and Rare correctbut Ris notthe correctexplanation A . Answer :A

Discussion

40.	Assertion (A): Except Scandium all 3d series, transition elements exhibit variable oxidation states, Reason (R): By loosing electrons from (n-1)d orbital and ns orbital as the energy difference between them is very small
Answer» Both (A) and (R) are CORRECT and (R) EXPLAINS (A). Both (A) and (R) are correct but (R) is not the correct EXPLANATION of (A). (A) is correct but (R) is WRONG. (A) is wrong but (R) is correct. Solution :Both (A) and (R) are correct and (R) explains (A).

Discussion

41.	Assertion (A) : Ethyl amine gives positive carbylamine and mustard oil reaction. Reason (R ) : Ethyl amine is a 1^(@) amine.
Answer» (A) and (R ) are TRUE and (R ) is the CORRECT explaination 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

42.	Assertion (A): Ethyl alcohol is soluble in organic solvents Reason(R): Calcium chloride can form an addition compound with ethyl alcohol
Answer» Both A and R are true and R is the CORRECT EXPLANATION to A Both A and R are true and R is not the correct explanation to A A is true but R is false A is false but R is true Answer :A

Discussion

43.	Assertion (A): Ethyl alcohol is manufactured by fermentation of sugar. Reason (R): Lower alcohols are oils, liquids or waxy solids.
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

44.	Assertion (A): Ethers is used as a solvent for Grignard reagent. Reason (R): Ether decomposes grignard reagent to give methane.
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

45.	Assertion: (A) Ethers are relatively inert when compared to C_(2)H_(5)OH Reason (R): The hybridization of C and O in CH_(3)-O-CH_(3) is SP^(3)
Answer» Both A and R aretrue and R is the CORRECT explanation to A Both A and R are true and R is not the correct explanation to A A is true but R is false A is false but R is true Answer :B

Discussion

46.	Assertion (A): Ethers have higher boiling points than alcohols of comparble molecular mass. Reason (R): Both ethers and alcohols form intermolecular hydrogne bands.
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 :D

Discussion

47.	Assertion (A) : Ethanol is obtained commercially by fermentation of sugars. Reason (R) In wine making, grapes are the source of sugars and yeast.
Answer» Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct EXPLANATION of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct EXPLANATIONOF the Assertion (A). Assertion (A) is correct, but Reason (R) is INCORRECT statement. Assertion (A) is incorrect, but Reason (R) is correct statement. Answer :B

Discussion

48.	Assertion (A): Ethanol is a weaker acid than phenol. Reason (R): Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
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

49.	Assertion (A) : Ethers are classified on the basis of alkyl groups attached to the oxygen atom. Reason (R) : The presence of -OH group in phenols deactivates the aromatic ring towards electrophilic substitution.
Answer» Both ASSERTION (A) and Reason (R) are correct STATEMENTS, and Reason (R) is the correct explanation of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct EXPLANATIONOF the Assertion (A). Assertion (A) is correct, but Reason (R) is incorrect statement. Assertion (A) is incorrect, but Reason (R) is correct statement. Answer :C

Discussion

50.	Assertion (A) : Ethanal is soluble in water in all proportions due to the formation of hydrogen bonding. Reason (R) : Aldehydes and ketones undergo electrophilic addition reactions.
Answer» Both ASSERTION (A) and Reason (R) are correct STATEMENTS, and Reason (R) is the correct explanation of the Assertion (A). Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A). Assertion (A) is correct, but Reason (R) is incorrect STATEMENT. Assertion (A) is incorrect, but Reason (R) is correct statement Answer :C

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Assertion (A): Hydrolysis of XeF_4 and XeF_6 with water gives XeO_3. Reason (R) : The structures of the three Xenon fluorides can be deduced from VSEPR.

Assertion (A) : Hydrolysis of ethyl acetate in acidic medium is a first order reaction. Reaction (R ) : For a complex reaction, order is given by the slowest step.

Assertion (A) : Hydrolysis of ethyl acetate in the presence of acid is a first order reaction whereas in the presence of alkali, it is a second order reaction. Reason (R ) : Acid only acts as catalyst whereas alkali acts as one of the reactants.

Assertion (A) : Hydrolysis of an ester follows first order kinetics. Reason (R ) : Concentration of water remains nearly constant during the course of the reaction.

Assertion (A) : Hydrolysis of (-)-2-bromooctane proceeds with inversion of configuration. Reason (R ) : This reaction proceeds through the formation of a carbocation.

Assertion (A): Hydrogenation of vegetable oil in the presence of finely divided Ni produces vegetable ghee. Reason (R) : Ammonia is produced by the reaction between N_2 and H_2 in the presence of Ni in Ostwald process.

Assertion (A) : Hydrolysis of (-)-2-bromooctane proceeds with inversion of configuration. Reason (R) : This reaction proceeds through the formation of a carbocation.

Assertion (A) : Hydrogen iodide decomposes at 400^(@)C while hydrogen fluoride and hyrogen chloride are stable at this temperature. Reason (R ) : Thermal stability of hydrogen halides decreases from fluoride to iodide.

Assertion (A) : Higher carboxylic acids are practically insoluble in water. Reason (R) : Carboxylic acids dissociate in water to give resonance stabilised carboxylic anions and hydronium ion.

Assertion (A) : Henry was the first to give a quantitative relation between pressure andsolubility of a gas.Reason (R) : Solubility of a gas in liquids increases with rise in temperature.

Assertion (A) : Helium is used in diving apparatus. Reason (R) : Argon is used in discharge tubes and fluorescent bulbs for advertisement display.

Assertion (A) : Haemoglobin, the red pigment of blood which acts as an oxygen carrier is a coordination compound. Reason (R) : The excess of copper is removed by the chelating ligand desferrioxime B.

Assertion (A) : Halothane is used as an anaesthetic during surgery.Reason (R) : The deficiency of iodine in our body causes goitre.

Assertion (A): Glycine must be taken through diet. Reason (R) : It is an essential amino acid.

Assertion (A) : Glycinemust betaken through diet . Reason (R) : Itis an essential amino acid .

Assertion (A) : Glucose reacts with hydroxylamine to form an axime and also adds a molecule of hydrogen cyanide to give cyanohydrin . Reason (R ): The carbony group is present in the open chain structure of glucose .

Assertion (A): Glucose is found to exist in two crystalline forms which are known as alphaand beta Reason (R) :The formula for aspartic acid is :H_(2)N - underset(CH_(3))underset(|)overset(COOH)overset(|)(C) - H

Assertion (A) : Glucose is called bloondsugar. Reason (R) :Humanbloodcontains about 100 mg/dlof glucose henceit is calledbloodsugar.

Assertion (A) :Glucose iscalledaldohexoseaswellasdextrose. Reason (R) : Glucosecontainan aldehydegroupannd it rotates the planepolarished lightin the clockwise direction.

Assertion(A) : Glucosecontainsan aldehyde groupand it occupies one endof the carbon chain. Reason (R) : Whenglucoseis oxidisedby brominewater , itgetsoxidised to gluconicacidconfirms theposition of aldehydegroup.

Assertion (A) : Glucosecontainsoneprimary alcoholgroupat the end ofthe carbon chain. Reason (R) : Whenglucoseis oxidisedagentconc. HNO_(3)it gives glucaricacidproves the presenceof-CH_(2) OH group at one endof carbon chain in glucose .

Assertion (A) : Glass, rubber and plastics form crystals when their liquids solidify on cooling. Reason (R) : Solids are incompressible and rigid.

Assertion (A) : Glucoseandmannose are epimers. Reason (R) : sugars differingin configurationat an asymmetriccentre are called epimers.

Assertion (A) : Geometrical isomerism exists in homoleptic complexes. Reason (R ) : In homoleptic complexes due to different possible three dimensional spatial arrangements of ligands around the central metal atoms.

Assertion (A) :Geometrical isomerism exists in heteropleptic complexes. Reason (R ): In heteroleptic complexes due to different possible three dimensional spatial arrangement of ligands around the central metal atom results in geometrical isomers.

Assertion (A): Gases like SO_(2)2, NH_3 and CO_(2)are readily adsorbed. Reason (R) : SO_(2), NH_(3) and CO_(2)are easily liquefiable as have greater van der Waal's forces of attraction and adsorbed readily.

Assertion (A) Gabriel phthalimide reaction can be used to prepare aryl and alkyl amines.Reason (R ) Aryl halides have same reactivity as alkyl halides towards nucleophilic substitution reactions.

Assertion (A) : Gabriel synthesis is used for the preparation of primary amines. Reason (R) : In Hoffmann bromamide, the amine obtained contains one carbon atom more than the amide.

Assertion (A): Fullerene has aromatic character. Reason(R):Some of the fullernes have sigma- bonds and delocalised pi- bonds.

Assertion (A) : For the preparation of aldehydes on industrial scale, alcohol vapours are passed over heavy metal catalysts (Ag or Cu). Reason (R) : Ozonolysis of alkenes followed by reaction with Zn dust and water gives aldehydes.

Assertion (A) : Fructoseis calledlevuloseand keto hexose . Reason (R): Fructosecontainsa ketone groupand fructose rotates the planepolarised lightin anticlockwisedirection .

Assertion (A) : For making rubber synthetically,isoprene molecules are polymerized. Reason (R) : Neoprene (a polymer of chloroprene) is a synthetic rubber.

Assertion (A) : For ideal solution Delta H_(mix) and Delta V_(mix) are always zero.Reason (R ) : Intermolecular attractive forces in solution is same as liquid.

Assertion (A) : For a reaction, with rise in temperature by 10^(@)C, the rate constant is nearly doubled. Reason (R ) : A catalyst changes the equilibrium point of the reaction.

Assertion (A): Fluorine is most reactive element among the halogens. Reason(R):Fluorine has minimum bond dissociation energy.

Assertion (A) : [Fe(CN)_(6)]^(3-) is paramagnetic Reason (R ) : In [Fe(CN)_(6)]^(3-), there is one unpaired electron and so it is paramagnetic

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

Assertion (A) : F_2 is a strong oxidising agent. Reason (R ) : Electron gain enthalpy of fluorine is less negative.

Assertion (A) : Expect glyicineall otheramino acidsare optically active. Reason (R) : Glycine does notcontainchiralatom whereas in all otheramino acidshave chiral carbon atom.

Assertion (A): Except Scandium all 3d series, transition elements exhibit variable oxidation states, Reason (R): By loosing electrons from (n-1)d orbital and ns orbital as the energy difference between them is very small

Assertion (A) : Ethyl amine gives positive carbylamine and mustard oil reaction. Reason (R ) : Ethyl amine is a 1^(@) amine.

Assertion (A): Ethyl alcohol is soluble in organic solvents Reason(R): Calcium chloride can form an addition compound with ethyl alcohol

Assertion (A): Ethyl alcohol is manufactured by fermentation of sugar. Reason (R): Lower alcohols are oils, liquids or waxy solids.

Assertion (A): Ethers is used as a solvent for Grignard reagent. Reason (R): Ether decomposes grignard reagent to give methane.

Assertion: (A) Ethers are relatively inert when compared to C_(2)H_(5)OH Reason (R): The hybridization of C and O in CH_(3)-O-CH_(3) is SP^(3)

Assertion (A): Ethers have higher boiling points than alcohols of comparble molecular mass. Reason (R): Both ethers and alcohols form intermolecular hydrogne bands.

Assertion (A) : Ethanol is obtained commercially by fermentation of sugars. Reason (R) In wine making, grapes are the source of sugars and yeast.

Assertion (A): Ethanol is a weaker acid than phenol. Reason (R): Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.

Assertion (A) : Ethers are classified on the basis of alkyl groups attached to the oxygen atom. Reason (R) : The presence of -OH group in phenols deactivates the aromatic ring towards electrophilic substitution.

Assertion (A) : Ethanal is soluble in water in all proportions due to the formation of hydrogen bonding. Reason (R) : Aldehydes and ketones undergo electrophilic addition reactions.