94420 + Interview Questions in Chemistry in Class 12

1.	In the reaction with HCl, an alkene reacts in accordance with the markovnikov's rule to give a product 1-chloro-1-methylcyclohexane. The possibel alkene is
Answer» A and B Solution :Both A and B will GIVE the same PRODUCT.

Discussion

2.	In the reaction with HCI, an alkene reacts in accordance with the Markovnikov's rule, to give a product 1-chloro-1- methylcyclohexane. The possible alkene is
Answer» (a) and (B) SOLUTION :

Discussion

3.	In the reaction with HCl , an alkane reacts in accordance with the Markownikoff's rule, to give a product 1-chloro-1 methylcyclohexane. The possible alkane is -
Answer» both A and B Solution :

Discussion

4.	In the reaction VO+Fe_(2)O_(3) to FeO+V_(2)O_(5), the eq. wt. of V_(2)O_(5) is equal to its
Answer» MOL .WT mol.wt/8 mol.wt/6 none of these ANSWER :C

Discussion

5.	In the reaction underset(Br_(2)) overset(NaOH("aq"))to Intermediate the intermediate are
Answer» SOLUTION :FACT BASED QUESTION

Discussion

6.	In the reaction, underset(vapour)(C_(2)H_(5)OH) overset(Cu)underset(300^(@)C)toX The molecular formula of X is
Answer» `C_(4)H_(6)O` `C_(4)H_(10)O` `C_(2)H_(4)O` `C_(2)H_(6)` ANSWER :C

Discussion

7.	In the reaction : The [X] is……
Answer» `FeI_(3)` `HNO_(3)` HI `H_(3)PO_(4)` ANSWER :B

Discussion

8.	In the reaction : The product (P) is ……
Answer» SOLUTION :The REACTION is BENZYLIC HALOGENATION.

Discussion

9.	In the reaction the intermediate (s) is/are
Answer» ANSWER :A::B::C

Discussion

10.	In thereactionthe finalproduct A is :
Answer» `(CH_(3))_(3) "CC"= CH` `(CH_(3))_(3) "CC"H_(2) -CH_(2)OH` `(CH_(3))_(3)UNDERSET(OH)underset(\|)("CC" H) - CH_(3)` `(CH_(3))_(3) "CC"H_(2) CH_(3)` ANSWER :C

Discussion

11.	In the reaction the given below The incorrect statement concerning the above reation is are .
Answer» (I) is the major elimination product (II) is formed at faster rate than (I) (I) is formed at faster rate than (II) increasing order of reactivity with different `X` is `FltCIltBrltI` . Solution :With ethoxide base most SUBSTITUTED alkene (I) is formed as the major product in the formation of (II) `C_(2)H_(5)O` takes proton from less hindered Beta -carbon HENCE less activation energy and greater rate of reaction althought stabilityof product determines it content at EQUILIBRIUM Also since `E2` reaction is an elementary reaction in which halogen leaves in the rate determining step iodide leaves most easily and fluoride with maximum difficulty .

Discussion

12.	In the reaction , the main product is :
Answer» PHENYL acetate Acetophenone Benzoic acid Benzophenone. Answer :B

Discussion

13.	In the reaction The equivalent weight of Nitrobenzene is
Answer» M `(M)/(2)` `(M)/(4)` `(M)/(6)` ANSWER :D

Discussion

14.	In the reaction , The compounds A,B and C are respectively
Answer» BENZENE, NITROBENZENE and aniline benzene, DINITROBENZENE and m-toluidine toluene, nitrobenzene and m-toluidine benzene, nitrobenzene and hydrazobenzene. Solution :

Discussion

15.	In the reaction the electrophile involved is
Answer» dichloromethyl anion formyl cation dichloromethyl cation dichlorocarbene Answer :D

Discussion

16.	In the reaction, the bombarding projectile X is : ""_(3)^(7)Li+Xto""_(4)^(7)Be+""_(0)^(1)n
Answer» `ALPHA`-particle Proton Neutron Deutron. Answer :A

Discussion

17.	In the reaction SnCl_2 + 2HgCl_2 rarr A + SnCl_4 , A is :
Answer» `HgCl_2` Hg HgCl `HgCl_3` ANSWER :A

Discussion

18.	In the reaction sequence[X] is ketone: [X] overset("KMnO"4//overset(oplus)(O)H//Delta)(rarr) HOOC - (CH_(2)_(3) - CH_(2)-COOH [X] will be:
Answer» ANSWER :A

Discussion

19.	In the reaction SnCl_(2)+2Cl^(-) rarr SnCl_(4), Lewis acid is
Answer» `SnCl_(2)` `CL^(-)` `SnCl_(4)` None of these Solution :Because `SnCl_(2)` is a ELECTRON acceptor according to Lewis CONCEPT.

Discussion

20.	In the reaction shown below the major product(s) formed is/are overset("acetic anhydide")underset(CH_(2)Cl_(2))to product(s)
Answer» SOLUTION :

Discussion

21.	In the reaction sequence, [X] is ketone : [X] overset(KMnO_(4)//OH^(-)//Delta)rarrHOOC(CH_(2))_(3)-overset(CH_(3))overset(\|)CH-COOH [X] will be :-
Answer» ANSWER :B

Discussion

22.	In the reaction sequence Xunderset(H_(2)O)overset(KOH)rarr Yunderset(633 K)overset(Al_(2)O_(3))rarrZoverset(O)rarr2"mol" of CH_(3)COOH X is
Answer» `CH_(3)CH_(2)CH(I)CH_(3)` `CH_(3)CH_(2)CH_(2)CH_(2)I` `CH_(3)CH(I)CH(I)CH_(3)` `CH_(3)CH(I)CH_(2)CH_(2)I` ANSWER :A

Discussion

23.	In the reaction sequence product will be
Answer» `C_(6)H_(5)-overset(OH)overset(\|)CH-CH_(2)-COOH` `C_(6)H_(5)-COOH,COOH-COOH` and `CHBr_(3)` `C_(6)H_(5)-overset(O)overset(\|\|)C-CH_(3),CO_(2)` and `CHBr_(3)` Only `CHBr_(3)` Answer :C

Discussion

24.	In the reaction sequence, "Ethane" overset("HOCl") to A overset(x) to "ethane" -1,2-diol. A and X respectively are
Answer» Choroethane and NaOH ETHANOL and `H_(2)SO_(4)` 2-chloroethan - 1-ol and `NaHCO_(3)` ethanol and `H_(2)O` Answer :C

Discussion

25.	In the reactionsequence, Ethanaoverset(" HOCI")to A overset(x)to" ethan -1, 2diolA and Xrespectivelyare
Answer» Chloroethaneand NaOH ethanol I and ` H_(2)SO_(4)` 2 -chloroethan-1-ol and ` NaHCO_(3)` ethanol and ` H_(2)O` Answer :C

Discussion

26.	In the reaction sequence CH_(3)-overset(O)overset(\|\|)(C)-H-underset(.^(Θ)OH)overset(HCN)rarr(A) underset(Delta)overset(H_(2)O //overset(o+)(H))rarr Product is/are :
Answer» Diasteromers RACEMIC mixture of hydroxy acid PRODUCT is racemic mixture of cyanohydrin Products is OPTICALLY inactive Solution :`CH_(3)-OVERSET(O)overset(\|\|)(C)-H overset(HCN)underset(.^(Theta)OH)to underset("Cyanohydrin dl mixture")(CH_(3)-overset(OH)overset(\|)underset(H)underset(\|)(.^(**)(C))-CN) overset(H_(3)overset(o+)(O))underset(Delta)to underset("dl mixture")(CH_(3)-overset(OH)overset(\|)underset(H)underset(\|)(C)-COOH)`

Discussion

27.	In the reaction sequence. Correct statement regarding B is :
Answer» It is less acidic than DEGREE of unsaturation in B is 6 It REACTS with `Br_(2)`/ acetic acid to form tetra bromo product B give violet colour with NEUTRAL `FeCl_(3)`. Answer :D

Discussion

28.	In the reaction sequence CH_(3)-CO-CH_(3)overset(C_(2)H_(5)OH//OH^(-))rarr(A) overset(C_(2)H_(5)OH//H^(+))rarr[X] will be
Answer» ANSWER :C

Discussion

29.	In the reaction sequence CH_3-CH_2-COOHoverset(H_2O_2)rarr[X]overset(Delta)rarr[Y] [Y] will be
Answer» `CH_3-OVERSET(OH)overset(\|)(CH)-COOH` `CH_2=CH-COOH` `overset(OH" ")overset(\|"")(CH_2)-CH_2-COOH` Lactide Answer :B

Discussion

30.	In the reaction sequence, CH_2 = CH_2 overset(HOCl)to X overset(Y)to {:(CH_2OH),(\|),(CH_2OH):}the molecule, X and regent, Y, respectively are :
Answer» `CH_2OHCH_2Cl, Na_2CO_3,H_2O` `CH_3CH_2OH and H_2SO_4` `CH_2Cl - CH_2OH and HONO` `CH_3 - CH_3` and heat. Answer :A

Discussion

31.	In the reaction sequence : C_6H_5CHOunderset(Delta)overset(NH_2OH//H^+)(rarr)[X] underset(("Beckmann"))overset(P_2O_3//Delta)(rarr)[Y] overset(H_2O //H^+)(rarr)[Z] [X], [Y] and [Z] respectively be :
Answer» `C_6H_5CH=N-OH, C_6H_5CN,C_6H_5COOH` `C_6H_5CH=NOH,C_6H_5CONH_2,C_6H_5COOH` `C_6H_5-CH=NOH,C_6H_5COOH,C_6H_5CONH_2` `C_6H_5-CH=NOH,C_6H_5COOH,C_6H_5CN` ANSWER :B

Discussion

32.	In the reaction sepuence, CaC_(2) overset(H_(2)O)rarrAunderset(Hg^(2+))overset(dil.H_(2)SO_(4))rarrBunderset(Ni)overset(H_(2))rarrC, the product C is
Answer» GIVE yellow PPT. with NaOI it's FINAL oxidationproduct is carbonyl compound Its final oxidation product is `CO_(2)` and `H_(2)O` Its final oxidation product is `CH_(3)COOH` SOLUTION :. Compound A is UNSATURATED . Compound A is alkyne.

Discussion

33.	In the reaction sequence C_(6)H_(6) overset(CH_(3)CI) underset (AICI_(3)(anhy.)) to (X) overset (KMnO_(4)) to (Y) the product (Y) is
Answer» Chlorobenzene benzaldehyde benzoic acid benzene Answer :C

Discussion

34.	In the reaction sequence C_(6)H_(5)-underset(O)underset(\|\|)C-CH_(3)overset(NH_(2)OH//overset(o+)H)rarr(A)overset(P_(2)O_(5))rarr [X] [X] will be
Answer» `{:(C_(6)H_(5)-C-CH_(3)),("\|\|"),(""N-OH):}` `CH_(3)COOH` `C_(6)H_(5)-NH_(2)` `CH_(3)-CO-NH-C_(6)H_(5)` ANSWER :D

Discussion

35.	In the reaction sequence C_(6)H_(5)-CH=CH-overset(O)overset(\|\|)C-CH_(3)underset((ii)H_(2)"O"//H^(+))overset((i)CH_(3)MgBr)to[X] (major product X will be
Answer» ANSWER :C

Discussion

36.	In the reaction sequence , C_(2)H_(5)OHoverset(PBr_(3))toAoverset(KCN)toBoverset(H_(3)O^(+))toC,C is
Answer» Acetic Acetamide Propionic acid Ethylamine. Solution :`C_(2)H_(5)OHoverset(P,Br_(2))toC_(2)H_(5)Broverset(KCN)toC_(2)H_(5)CNoverset(H_(3)O^(+))tounderset("Propionic acid")underset((C))(CH_(3)CH_(2)COOH`

Discussion

37.	In the reaction sequence C_2 H_5 Cl + KCN overset(C_2 H_5 OH)to x underset(Delta)overset(H_3 O^(o+))to Y . What is the molecular formuls of Y ?
Answer» `C_3H_5O_2` `C_3H_5N` `C_2 H_4 O_2` `C_2H_6O` ANSWER :A

Discussion

38.	In the reaction sequence A+B overset("NaOH)underset(Delta)to C_(6)H_(5)-CH=overset(CH_(3))overset(\|)C-CHO (A) and (B) will be
Answer» `C_(6)H_(5)-CHO` and `CH_(3)CHO` `C_(6)H_(5)-CH_(2)-CHO` and `CH_(3)CHO` `C_(6)H_(5)-CHO` and `CH_(3)CH_(2)CHO` `C_(6)H_(5)COCH_(3)` and `CH_(3)CHO` Answer :C

Discussion

39.	In the reaction sequence, C_2H_5Cl + KCN overset(C_2H_5OH)(rarr)X overset(H_2O^(o+))(rarr) Y + NH_3 What is the molecular formula of 'Y' ?
Answer» `C_(3) H_(6) O_(2)` `C_(3) H_(5) N` `C_2 H_4 O_2` `C_2 H_6 O` ANSWER :A

Discussion

40.	S + (3)/(2)O_(2) rarr SO_(3) + 2x kcal SO_(2) + (1)/(2) O_(2) rarr SO_(3) + y kcal Find out the heat of formation of SO_(2) :
Answer» 2x - y x + y 2x + y x - y Solution :The REQUIRE EQUATION is : `S + O_(2) rarr SO_(2)` The given equation are (i) `S + (3)/(2)O_(2) rarr SO_(2) + 2x KJ` (ii) `SO_(2) + (1)/(2)O_(2) rarr SO_(3) + y kJ` Subtracting eqn. (ii) from eqn. (i) `S + O_(2) rarr SO_(2) + 2x - y` :. Heat of formation = 2x - y

Discussion

41.	In the reaction S + 3/2 O_2 to SO_3 2x kJ and SO_2+ 1/2 O_2 to SO_3 ykJ heat of formationof SO_2 is
Answer» `x-y` `2x+y` `x+y` `2x-y` SOLUTION :`S+3/2O_(2)toSO_(3)+2x KJ " " …(i)` `SO_(2)+1/2 O_(2) to SO_(3) + y kJ"" ….(II) ` `S+O_(2) to SO_(2) + q kJ "" ….(iii)` Equation (iii) can be OBTAINED by subtracting equation (ii) from (i) `rArr q = 2x - y kJ ` Enthalpy of formation `(DeltaH_(f)) = - q = - (2x-y) = y - 2x`

Discussion

42.	In the reaction, Rxoverset(NaN_(3))rarr A overset(H_(2)//Pd-C)rarr B+N_(2) The product B is :
Answer» `R_(2)NH` `RN_(3)` `R_(3)N` `RNH_(2)`. SOLUTION :`PX overset(NaN_(3))RARR RN_(3)overset(H_(2)//Pd-C)rarr RNH_(2)+N_(2)`

Discussion

43.	In the reaction RNH_(2)overset(CHCl_(3).KOH)rarr X+Y+H_(2)O. X and R are :
Answer» `RCN, KCL` `RNC, KCl` `ROH, KCl` `RCONH_(2), KCl` Answer :B

Discussion

44.	In the reaction,R-X overset("alcoholic KCN")rarr A overset("dilute HCl")rarr Bthe product B is
Answer» alkyl chloride aldehyde carboxylic ACID ketone Solution :`UNDERSET("alkyl halide")(R-X)OVERSET("alcoholic KCN")rarr underset("alkyl cyanide")(R-CN) overset(DIL. HCl)rarr underset("carboxylic acid")(R-COOH)`

Discussion

45.	In the reaction R-S-Runderset(KMnO_(4))overset([O])(rarr)X, theproduct X is :
Answer» a sulphoxide a sulphone an ALKANE an alkene Answer :B

Discussion

46.	In the reaction RNH_(2)+CS_(2)rarrA overset(HgCl_(2))rarr B. the product B is :
Answer» ALKYL halide Alkyl isothiocyanate Amide Mercury salt of acid. Solution :`RNH_(2)+CS_(2)OVERSET(HgCl_(2))rarr RNCS+HgS+2HCl`

Discussion

47.	In the reaction R-overset(O)overset(\|\|)(C)-OHoverset(H_(3)O^(+))rarrXoverset((H))rarrRCH_(2)NH_(2),'X' is
Answer» Isonitrile Nitrile Nitrite Oxime Solution :

Discussion

48.	In the reaction : "Quick lime"overset(H_(2)O)toXoverset(Cl_(2))toY X and Y are respectively :
Answer» `Ca(OH)_(2),CaCl_(2)` `CaCl_(2),Ca(HCO_(3))_(2)` `Ca(OH)_(2),CaOCl_(2)` `CaCO_(3),CaOCl_(2)` Answer :C

Discussion

49.	In the reaction, Pooverset(-alpha)rarr Pb overset(-beta)rarr Bi, if Bi, belongs to group 15, to which Po belongs
Answer» 14 15 13 16 Solution :ACCORDING to GROUP DISPLACEMENT LAW

Discussion

50.	In the reaction Propene overset(HBr)rarrAoverset(alc.KOH)rarrBunderset("Peroxide")overset(HBr)rarrCoverset(aq.KOH)rarrD,D is :
Answer» `CH_(3)CH_(2)CH_(2)OH` `CH_(3)UNDERSET(OH)underset("\|")(CH)CH_(3)` `CH_(3)CH_(2)COOH` `CH_(3)CH_(2)CHO` Answer :A

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In the reaction with HCl, an alkene reacts in accordance with the markovnikov's rule to give a product 1-chloro-1-methylcyclohexane. The possibel alkene is

In the reaction with HCI, an alkene reacts in accordance with the Markovnikov's rule, to give a product 1-chloro-1- methylcyclohexane. The possible alkene is

In the reaction with HCl , an alkane reacts in accordance with the Markownikoff's rule, to give a product 1-chloro-1 methylcyclohexane. The possible alkane is -

In the reaction VO+Fe_(2)O_(3) to FeO+V_(2)O_(5), the eq. wt. of V_(2)O_(5) is equal to its

In the reaction underset(Br_(2)) overset(NaOH("aq"))to Intermediate the intermediate are

In the reaction, underset(vapour)(C_(2)H_(5)OH) overset(Cu)underset(300^(@)C)toX The molecular formula of X is

In the reaction : The [X] is……

In the reaction : The product (P) is ……

In the reaction the intermediate (s) is/are

In thereactionthe finalproduct A is :

In the reaction the given below The incorrect statement concerning the above reation is are .

In the reaction , the main product is :

In the reaction The equivalent weight of Nitrobenzene is

In the reaction , The compounds A,B and C are respectively

In the reaction the electrophile involved is

In the reaction, the bombarding projectile X is : ""_(3)^(7)Li+Xto""_(4)^(7)Be+""_(0)^(1)n

In the reaction SnCl_2 + 2HgCl_2 rarr A + SnCl_4 , A is :

In the reaction sequence[X] is ketone: [X] overset("KMnO"4//overset(oplus)(O)H//Delta)(rarr) HOOC - (CH_(2)_(3) - CH_(2)-COOH [X] will be:

In the reaction SnCl_(2)+2Cl^(-) rarr SnCl_(4), Lewis acid is

In the reaction shown below the major product(s) formed is/are overset("acetic anhydide")underset(CH_(2)Cl_(2))to product(s)

In the reaction sequence, [X] is ketone : [X] overset(KMnO_(4)//OH^(-)//Delta)rarrHOOC(CH_(2))_(3)-overset(CH_(3))overset(|)CH-COOH [X] will be :-

In the reaction sequence Xunderset(H_(2)O)overset(KOH)rarr Yunderset(633 K)overset(Al_(2)O_(3))rarrZoverset(O)rarr2"mol" of CH_(3)COOH X is

In the reaction sequence product will be

In the reaction sequence, "Ethane" overset("HOCl") to A overset(x) to "ethane" -1,2-diol. A and X respectively are

In the reactionsequence, Ethanaoverset(" HOCI")to A overset(x)to" ethan -1, 2diolA and Xrespectivelyare

In the reaction sequence CH_(3)-overset(O)overset(||)(C)-H-underset(.^(Θ)OH)overset(HCN)rarr(A) underset(Delta)overset(H_(2)O //overset(o+)(H))rarr Product is/are :

In the reaction sequence. Correct statement regarding B is :

In the reaction sequence CH_(3)-CO-CH_(3)overset(C_(2)H_(5)OH//OH^(-))rarr(A) overset(C_(2)H_(5)OH//H^(+))rarr[X] will be

In the reaction sequence CH_3-CH_2-COOHoverset(H_2O_2)rarr[X]overset(Delta)rarr[Y] [Y] will be

In the reaction sequence, CH_2 = CH_2 overset(HOCl)to X overset(Y)to {:(CH_2OH),(|),(CH_2OH):}the molecule, X and regent, Y, respectively are :

In the reaction sequence : C_6H_5CHOunderset(Delta)overset(NH_2OH//H^+)(rarr)[X] underset(("Beckmann"))overset(P_2O_3//Delta)(rarr)[Y] overset(H_2O //H^+)(rarr)[Z] [X], [Y] and [Z] respectively be :

In the reaction sepuence, CaC_(2) overset(H_(2)O)rarrAunderset(Hg^(2+))overset(dil.H_(2)SO_(4))rarrBunderset(Ni)overset(H_(2))rarrC, the product C is

In the reaction sequence C_(6)H_(6) overset(CH_(3)CI) underset (AICI_(3)(anhy.)) to (X) overset (KMnO_(4)) to (Y) the product (Y) is

In the reaction sequence C_(6)H_(5)-underset(O)underset(||)C-CH_(3)overset(NH_(2)OH//overset(o+)H)rarr(A)overset(P_(2)O_(5))rarr [X] [X] will be

In the reaction sequence C_(6)H_(5)-CH=CH-overset(O)overset(||)C-CH_(3)underset((ii)H_(2)"O"//H^(+))overset((i)CH_(3)MgBr)to[X] (major product X will be

In the reaction sequence , C_(2)H_(5)OHoverset(PBr_(3))toAoverset(KCN)toBoverset(H_(3)O^(+))toC,C is

In the reaction sequence C_2 H_5 Cl + KCN overset(C_2 H_5 OH)to x underset(Delta)overset(H_3 O^(o+))to Y . What is the molecular formuls of Y ?

In the reaction sequence A+B overset("NaOH)underset(Delta)to C_(6)H_(5)-CH=overset(CH_(3))overset(|)C-CHO (A) and (B) will be

In the reaction sequence, C_2H_5Cl + KCN overset(C_2H_5OH)(rarr)X overset(H_2O^(o+))(rarr) Y + NH_3 What is the molecular formula of 'Y' ?

S + (3)/(2)O_(2) rarr SO_(3) + 2x kcal SO_(2) + (1)/(2) O_(2) rarr SO_(3) + y kcal Find out the heat of formation of SO_(2) :

In the reaction S + 3/2 O_2 to SO_3 2x kJ and SO_2+ 1/2 O_2 to SO_3 ykJ heat of formationof SO_2 is

In the reaction, Rxoverset(NaN_(3))rarr A overset(H_(2)//Pd-C)rarr B+N_(2) The product B is :

In the reaction RNH_(2)overset(CHCl_(3).KOH)rarr X+Y+H_(2)O. X and R are :

In the reaction,R-X overset("alcoholic KCN")rarr A overset("dilute HCl")rarr Bthe product B is

In the reaction R-S-Runderset(KMnO_(4))overset([O])(rarr)X, theproduct X is :

In the reaction RNH_(2)+CS_(2)rarrA overset(HgCl_(2))rarr B. the product B is :

In the reaction R-overset(O)overset(||)(C)-OHoverset(H_(3)O^(+))rarrXoverset((H))rarrRCH_(2)NH_(2),'X' is

In the reaction : "Quick lime"overset(H_(2)O)toXoverset(Cl_(2))toY X and Y are respectively :

In the reaction, Pooverset(-alpha)rarr Pb overset(-beta)rarr Bi, if Bi, belongs to group 15, to which Po belongs

In the reaction Propene overset(HBr)rarrAoverset(alc.KOH)rarrBunderset("Peroxide")overset(HBr)rarrCoverset(aq.KOH)rarrD,D is :