Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Identify (A) and (B). .

Answer»

SOLUTION :PROCEED reverser to FIND the structrue of (B)
` (##KSV_CHM_ORG_P2_C15_S01_021_S01.png" width="80%">.
Discussion
2.

Identify A and B in the reaction given below Ethane nitrile underset(aq." "H_(2)SO_(4)+2H_(2)O-NH_(3))overset("Hydrolysis")toA underset("Soda lime "Delta-CO_(2))overset("Decarboxylation")toB

Answer»

ETHANOIC ACID, Methane
Ethanoic acid, Ethane
Acetone, Methane
Acetic acid, Methanol

Answer :A
Discussion
3.

Identify A and B in the reaction CH_(3) CH_(2) CH_(2) Br overset(" aqueous KOH ")(to) A overset(" conc. " H_(2) SO_(4)// 170^(@) C)(to) B

Answer»

SOLUTION :`A implies CH_(3) CH_(2) CH_(2) OH "" B implies CH_(3) CH = CH_(2)`
Discussion
4.

Identify A and B in the following sequence of reactions: CH_(3)CH_(2)Br overset(KCN)toA overset(LiAlH_(4))toB.

Answer»

Solution :`UNDERSET("Bromoethane")(CH_(3)CH_(2)Br) underset(("Nucleophilic substitution"))overset(KCN)to underset("Propanenitrile (A)")(CH_(3)CH_(2)CN) underset(("Reduction"))overset(LiAlH_(4))to underset("PROPANAMINE (B)")(CH_(3)CH_(2)CH_(2)NH_(2))`.
Discussion
5.

Identify A and B in the following sequence of reaction (AAK_MCP_36_NEET_CHE_E36_029_Q01)

Answer»

(`AAK_MCP_36_NEET_CHE_E36_029_A01`)

ANSWER :C
Discussion
6.

Identify A and B in the following sequence : ""CH_(3)COOC_(2)H_(5) overset(NH_(3))(rarr)A overset(Br_(2)//KOH)(rarr) B

Answer»

<BR>

Answer :`underset("Ethyl ethanoate")(CH_(3)COOC_(2)H_(5))overset(NH_(3))(rarr)underset("Ethanamide")(CH_(3)CONH_(2)) overset(Br_(2)//KOH)(rarr)underset("Methanamine")(CH_(3)NH_(2))`
Discussion
7.

Identify A and B in the following reactions: (i) CH_(3)-underset(CH_(3))underset(|)(CH)-CONH_(2)overset(Br_(2)//NaOH)(to)(A)overset(HNO_(2))(to)(B) (iii) CH_(3)CN overset(H^(+)//H_(2)O)(to)(A)overset(LialH_(4))(to)(B)

Answer»

Solution :(i)`CH_(3)-underset(CH_(3))underset(|)(CH)-CONH_(2) overset(Br_(2)//NaOH)(to)CH_(3)-underset((A))underset(CH_(3))underset(|)(CH)-NH_(2)overset(HNO_(2))(to) underset("Propane-2-ol"(B))underset(CH_(3))underset(|)(CH)-OH`

(iii) `underset("Ethanenitrile")(CH_(3)CN)overset(H_(2)O//H^(+))(to) underset("ETHANOIC acid"(A))(CH_(3)-overset(O)overset(||)(C)-OH)overset(LiAlH_(4))(to)underset("ETHANOL"(B))(CH_(3)CH_(2)OH)`
Discussion
8.

Identify A and B in the following reactions: (i) C_(2)H_(5)=Noverset(LiAlH_(4))(to)(A)overset(HNO_(2))(to)(B)

Answer»

SOLUTION :(i) `underset("Propenonitrile")(C_(2)H_(5)C-=N)overset(LiAlH_(4))(to) underset("Propanamine"(A))(C_(2)H_(5)CH_(2)NH_(2))overset(HNO_(2))(to) underset("Prpanol(B))(C_(2)H_(5)OH)`
Discussion
9.

Identify A and B in the following sequence : CH_3COOC_2 H_5overset(NH_3)toAoverset(Br_2 //KOH)to B

Answer»

Solution :`UNDERSET(" ETHYL ethanoate")(CH_3 COOC_2 H_5 ) OVERSET(NH_3) to underset("Ethanamide ")(CH_3 CONH_2 ) overset(Br_2 //KOH)tounderset("METHANAMINE ")(CH_3 NH_2)`
Discussion
10.

Identify A and B in the following reactions : CH_(3)CHO overset([H])rarr A overset("conc." H_(2)SO_(4))underset("heat")rarrB + H_(2)O

Answer»

Solution :A is `CH_(3)COOH` acetic acid
B is `(CH_(3)CO)_(2)O` acetic anhydride
`CH_(3)-CHO + [O] rarr CH_(3)COOH`
`2CH_(3)-CH_(2)-OH + OVERSET("conc." H_(2)SO_(4))UNDERSET(Delta)rarr underset("Acetic anhydride")((CH_(3)CO)_(2)O + H_(2)O`
Discussion
11.

Identify A and B in the following reactions : C_(6)H_(5)CHO + CH_(3) - CH_(2) - CO -CH_(3) overset(-OH^(-))rarrA overset(-H_(2)O)rarrB overset(I_(2)//NaOH)rarrC

Answer»

Solution :`C_(6)H_(5)-UNDERSET(O)underset(||)(C)H+underset(H)underset(|)overset(CH_(3))overset(|)(C)H-underset(O)underset(||)(C)-CH_(3)underset("condensation Aldol")overset(-H_(2)O)rarr C_(6)H_(5)-underset((A))underset(OH)underset(|)(C)H-overset(CH_(3))overset(|)(C)H-underset(O)underset(||)(C)-CH_(3)`
`overset(Delta)underset(-H_(2)O)rarrC_(6)H_(5)-CH=underset((B))overset(CH_(3))overset(|)(C)-underset(O)underset(||)(C)-CH_(3)underset("NaOH")overset(I_(2))rarrCHI_(3)+C_(6)H_(5)-Ch=underset((C))(overset(CH_(3))overset(|)(C))-COONa`
`A=C_(6)H_(5)-underset(OH)underset(|)(C)H-overset(CH_(3))overset(|)(C)H-underset(O)underset(||)(C)-CH_(3)` , `B = C_(6)H_(5)-CH=overset(CH_(3))overset(|)(C)-underset(O)underset(||)(C)-CH_(3)`
(2) `CH_(3)COCH_(3) overset("dil. NaOH")RARRA`
Discussion
12.

Identify A and B in the following reactions : "Acetone" overset(2[H])rarrA overset(Delta)underset(H_(2)SO_(4))rarrB + H_(2)O

Answer»

Solution :A is `CH_(3)-overset(OH)overset(|)(C )H-CH_(3)` Isopropyl alcohol (propan-2-ol)
B is `CH_(3)-CH = CH_(2)` PROPANE
`CH_(3)-CO-CH_(3)+2[H] rarr CH_(3)-overset(OH)overset(|)(C )H - CH_(3)`
`CH_(3)-overset(OH)overset(|)(C )H -CH_(3)overset(Delta)UNDERSET(H_(2)SO_(4))rarrCH_(3)-CH = CH_(2) + H_(2)O`
Discussion
13.

Identify A and B in the following reactions : CH_(3)CHO overset(2[H])rarrA overset(Na)rarr B + H_(2)

Answer»

Solution :A is `CH_(3)-CH_(2)-OH` ethyl alcohol (ETHANOL), B is `CH_(3)-CH_(2)-ONA` SODIUM ethoxide.
`CH_(3)-CHO overset(2[H])rarrCH_(3)-CH_(2)-OH`
`CH_(3)-CH_(2)-OH + 2Na rarr 2CH_(3) - CH_(2)-Ona + H_(2)`
Discussion
14.

Identify A and B in the following reaction sequence . CH_3 - underset(CH_(3))underset(|)(C)H- CH = CH_2 + HBr to (A) overset(C_2 H_5 O^-)underset(C_(2) H_(5) OH)(to) (B)

Answer»

`A - (CH_(3))_(2) UNDERSET(Br)underset(|)(C)- CH_(2) - CH_(3), B = CH_(3) - underset(CH_(3))underset(|)(C)= CH - CH_(3)`
`A- (CH_(3))_(2) CH - OVERSET(Br)overset(|)(C)H- CH_(3) , B = (CH_(3))_(2) CH- CH= CH_(2)`
`A = (CH_(3))_(2) underset(Br)underset(|)(C)- CH_(2) CH_(3) , B = H_(2) C = underset(CH_3)underset(|)(C)- CH_2 - CH_3`
`A = (CH_(3))_(2) CH - overset(Br)overset(|)(C) H- CH_(3) , `

Solution :
Discussion
15.

Identify A and B in the following reactions : 2CH_(3)COCH_(3)overset("dil. NaOH)rarr A

Answer»

Solution :A is `CH_(3)-UNDERSET(CH_(3))underset(|)OVERSET(OH)overset(|)(C)-CH_(2)-COCH_(3)`, `2CH_(3)-CO-CH_(3)-overset("dil. NaOH)`
`underset("Diacetone alcohol")(CH_(3)-underset(CH_(3))underset(|)overset(OH)overset(|)(C )-CH_(2)-COCH_(3))`
Discussion
16.

Identify 'A' and 'B' in the following reaction : CH_(3)-CH=CH_(2) overset(HBr)(rarr) 'A' overset("alc. KOH")(rarr) 'B'

Answer»

Solution :`{:("Br"),("|"),(CH_(3)-CH=CH_(2) overset(HBr)(RARR)'A' overset("Alc. KOH")(rarr)'B'CH_(3)CH_(2)=CH_(2) overset(HBr)(rarr) CH_(3)CH-CH_(3)overset("alc. KOH")(rarr)CH_(3)CH=CH_(2)),("(major)Prop-1-ene"):}`
`A=2`-Bromopropane, B= PROPENE.
Discussion
17.

Identify A and B in the following reaction C_(2)H_(5)CI overset(A)toC_(2)H_(5)OH overset(B)larr C_(2)H_(5)CI

Answer»

A = aqueous KOH, B = AGOH
A = ALCOHOLIC KOH , B = aqueous NAOH
A = aqueous NaOH , B = `AgNO_2`
`A = AgNO_2, B = KNO_2`

Answer :A
Discussion
18.

Identify A andb in the following reaction , CH_(3) CH_(3) overset(B) (larr) CH_(3) COOH overset(Delta)(to) CH_(3) CH_(2) OH

Answer»

`{:("A" ,, "B") , (HI + "Red P" ,, LiAlH_(4)):}`
`{:("A" ,, "B") , (Ni// Delta ,, LiAlH_(4)):}`
`{:("A" ,, "B") , (LiAlH_(4) ,, HI + "Red P "):}`
`{:("A" ,, "B") , (Pd-BaSO_(4) ,, ZN + HCL):}`

Answer :C
Discussion
19.

Identify A and B in the following reaction.

Answer»

SOLUTION :
Discussion
20.

Identify A and B in the following reaction. C_2H_5C equiv N overset(LiAlH_4)rarr A overset(HNO_2)rarr B

Answer»

SOLUTION :`C_2H_5C EQUIV N OVERSET(LiAlH_4)RARR C_2H_5 - CH_2NH_2 overset(HNO_2)rarr C_2H_5CH_2OH`
Discussion
21.

Identify A and B in the following reaction:

Answer»

Solution :
(ii) `CH_(3)CH_(2)CH_(2)Broverset(NACN)(to) UNDERSET((A))(CH_(3)CH_(2)CH_(2)C-=Noverset(LiAH_(4))(to)underset("Butanamine"(B))(CH_(3)CH_(2)CH_(2)CH_(2)NH_(2))`
Discussion
22.

Identify A and B in the following reaction

Answer»

SOLUTION :
Discussion
23.

Identify 'A' and 'B' in the following reaction and rewrite the complete reaction : CH_(3)-CH_(2)-Br+AgCN overset(Delta)rarr A overset((Na)/(C_(2)H_(5)OH))rarr B Explain Hoffmann bromamide degradation reaction.

Answer»

SOLUTION :Hoffmann bromide degradation : when amide is treated with bromine and aqueous or alcoholic sodium hydroxide it gives a primary amine. <BR> `R-overset(O)overset("||")(C )-NH_(2)+Br_(2)+4NaOH rarr R-NH_(2)+Na_(2)CO_(3)+2NaBr+2H_(2)O`
This reaction is useful for decreasing the length of CARBON CHAIN by one carbon atom.
Discussion
24.

Identify A and B in the following reaction.

Answer»

SOLUTION :.
Discussion
25.

Identify A and B in the following chemical reactions. PCl_(5)+H_(2)O to A+HCl A+H_(2)O to B+HCl

Answer»

`PCl_(3), H_(3)PO_(4)`
`POCl_(3), H_(3)PO_(3)`
`PCl_(3), H_(3)PO_(3)`
`POCl_(3), H_(3)PO_(4)`

ANSWER :4
Discussion
26.

Identify [A] and [B] in the following ._(89)^(227)Ac overset(-beta)rarr [A] overset(-alpha)rarr [B] overset(-alpha)rarr Rn

Answer»

Po, Rn
Th, Po
Ra, Th
Th, Ra

Solution :`._(89)^(227)Ac overset(-beta)RARR ._(90)^(227)Th overset(-alpha)rarr ._(88)^(223)Ra overset(-alpha)rarr ._(86)^(219)Rn`
Discussion
27.

Identify A and B in the following :

Answer»

SOLUTION :
Discussion
28.

Identify A and B in each of the following processes : (i) CH_(3)CH_(2)Cl overset(NaCN)(rarr)A underset(Ni//H_(2))overset("reduction")(rarr)B (ii) C_(6)H_(5)NH_(2)overset(NaNO_(2)//HCl)A underset("OH^(-))(C_(6)H_(5)NH_(2))B

Answer»

Solution :(i) `CH_(3)CH_(2)Cl overset(NACN)(rarr)underset(underset("Propane nitrile")((A)))(CH_(3)CH_(2)CN)overset(Ni//H_(2))(rarr)underset(underset("PROPANAMINE")((B)))(CH_(3)CH_(2)CH_(3)NH_(2))`
Discussion
29.

Identify A and B from the following reaction, (i) H_(3)BO_(3)+NH_(3)overset(800-1200K)(to)A+3H_(2)O (ii) 4H_(3)BO_(3)+3C_(2)H_(5)Ohoverset(conc.H_(2)SO_(4))(to)B+3H_(2)O

Answer»

Solution :(i) `H_(3)BO_(3)+NH_(3)overset(800-1200)(to)UNDERSET(("BORON nitride"))(BN)+3H_(2)O`
(i) `4H_(3)NO_(3)+3C_(2)H_(5)Ohoverset(conc.H_(2)SO_(4))(to)underset(("Triethylborate"))(B(OC_(2)H_(5))_(3))+3H_(2)O`
Discussion
30.

Identify A and B CH_(3)-CH_(2)-underset(Br)underset(|)(CH)-CH_(3)overset("Alcoholic KOH")underset(Delta)rarrA+B+2KBr+2H_(2)O

Answer»

SOLUTION :`2CH_(3)-CH_(2)-underset(Br)underset(|)(C )H-CH_(3)overset("ALCOHOLIC KOH")underset(Delta)`
`CH_(3)-underset(2-"Butene")(CH)=CH-CH_(3)+CH_(3)-underset(1-"Butene")(CH_(2))-CH=CH_(2)+2KBr+2H_(2)O`
(A) `underset("2-Butene")(H_(3)-CH=CH-CH_(3))`
(B) `underset("1-Butene")(CH_(3))-CH_(2)-CH = CH_(2)`
Discussion
31.

Identify A and B CH-CH = CH_(2) overset(HBr)rarrA overset("alc. KOH")rarrB.

Answer»

Solution :`CH_(3)-CH = CH_(2) + HBr rarr CH_(3)-UNDERSET(Br)underset(|)(C )H-CH_(3)overset("alc. KOH")rarr CH_(3)-CH=CH_(2) + KBr`
(A) `underset("isopropyl bromide")(CH_(3)-underset(Br)underset(|)(C )H-CH_(3))` , (B) `underset("Propene")(CH_(3))-CH = CH_(2)`
Discussion
32.

Identify A and B C_(2)H_(5)OH overset(Na)rarrAoverset(C_(2)H_(5)Br)rarrB.

Answer»

SOLUTION :`2C_(2)H_(5)OH+2Naoverset(-H_(2))rarrC_(2)H_(5)ONaoverset(C_(2)H_(5)Br)rarrC_(2)H_(5)OC_(2)H_(5)+NaBr`
(A) `underset("Sodium ETHOXIDE")(C_(2)H_(5)ONa)` , (B) `underset("DIETHYL ether")(C_(2)H_(5)OC_(2)H_(5))`
Discussion
33.

Identify A and B from the following

Answer»

SOLUTION :
Discussion
34.

Identify A and B A overset(PCl_(5))rarr isopropylidene dichloride.

Answer»

Solution :`underset((A))underset("acetone")(CH_(3)-overset(O)overset(||)(C )-CH_(3))+PCl_(5) RARR underset("DICHLORIDE")underset("isopropylidene")(CH_(3)-"CCl"_(2)-CH_(3))+POCl_(3)`
Discussion
35.

Identify A and B A overset("Na, dry ether")rarr n-butene.

Answer»

Solution :`underset((A))underset("BROMOETHANE")(2C_(2)H_(5)Br)+2Na OVERSET("dry ether")rarr underset("n-butene")(CH_(3))-CH_(2)-CH_(2)-CH_(3)`
Discussion
36.

Identify A…. G in the following reaction sequence. A or Boverset((i)O_3)underset((ii)Zn//H_2O)toCH_3CHO+CH_3COCHO+HCHO

Answer»

SOLUTION :
Discussion
37.

Identify A

Answer»

`AICI_(3)`
`CR(OH)_(2)`
`CrCI_(3)`
None of these

Solution :`UNDERSET(solution)underset(Green)(CrCI_(3)) + 3NH_(4)OH rarr underset("Greensih ppt")(Cr(OH)_(3)darr)+3NH_(4)CI`
`Na_(2)O_(2) +H_(2)O rarr 2NaOH +[O] xx 3`
`2Cr(OH)_(3) +NaOH +3[O] rarr 2Na_(2)CrO_(4) +5H_(2)O`
`ulbar(2Cr(OH)_(3)+3Na_(2)O_(2)rarrunderset("YELLOW solution")(2Na_(2)CrO_(4))+2NaOH+2H_(2)O)`
`underset(Yellow)(2CrO_(4)^(2-))+2H^(o+)rarrunderset("Orange")(2CrO_(7)^(2-))+H_(2)O`
`Cr_(2)O_(7)^(2-) +2OH^(Theta) +2Pb^(2+) rarr underset(("BRIGHT yellow ppt"))(2PbCrO_(4)+H_(2)O)`
Discussion
38.

Identify A

Answer»

`FeSO_(4)`
`(NH_(4))_(2)SO_(4)`
`FeSO_(4)(NH_(4))_(2)SO_(4).6H_(2)O`
All are correct

Answer :C
Discussion
39.

Identify A.

Answer»

`FeCI_(3)`
`Fe(SO_(4))_(3)`
`FeSO_(4)`
All are correct

Solution :`A = FeSO_(4):B = Fe_(2)O_(3): c= SO_(2),D = SO_(3)'E = Fe(OH)_(2):F = (OH)_(3)`
Discussion
40.

Identify A

Answer»

ZnS
ZnO
MgO
FeO

Solution :Zinc OXIDE turns yellow on heating and white on cooling. (A) is `ZnO`, which is not soluble in water. `ZnO` is called Chinese white, zincite, philosopher's wool.
`ZnO +2HCI rarr UNDERSET((B))(ZnCI_(2)) +H_(2)O`
`ZnO +2NaOH rarr underset((C))(Na_(2)ZnO_(2))+H_(2)O`
`ZnO` is AMPHOTERIC.
`underset((B))(ZnCI_(2))+H_(2)S rarr` No ppt.
This is because `ZnS` is precipitated in basic medium with SUFFICIENT `[S^(2-)]` concentration.
`underset(("Neutral or basic solution"))(ZnCI_(2)+H_(2)S) OVERSET(NH_(4)OH)rarr underset((D))(ZnSdarr) +2HCI`
Discussion
41.

Identify A

Answer»

`FE(NO_(2))_(3)`
`ZnBr_(2)`
`FeBr_(3)`
`ZnCI_(2)`

Solution :`underset((A))(FeBr_(3))+3AgNO_(3)tounderset((D))(Fe(NO_(3))_(3)+3AgBr darr` (light YELLOW ppt.)
`FeBr_(3)+3H_(2)SO_(4)tounderset((B))(Fe_(2)(SO_(4))_(3)+3Br_(2)`
`FeBr_(3)+3NH_(4)OHtounderset((C))(Fe(OH)_(3) darr)+3NH_(4)Br`
Discussion
42.

Identify A

Answer»

`FeSO_(4)`
`FE(SO_(4))_(3)`
`Fe_(2)O_(3)`
`FEO`

Solution :N//A
Discussion
43.

Identifiy C and D in the following reactions :

Answer»

o,p- hydroxybenylamine
p-aminophenol
o, p-hydroxybenzaldeyde
0, p-hydroxybenzoic acid

Solution :`A=C_(6)H_(5)-OVERSET(+)N_(2)overset(-)Cl` (benzene diazonium chloride)
`B=C_(6)H_(5)-OH` (PHENOL)
Discussion
44.

Identifiy the final prodcut of the given reaction.

Answer»




SOLUTION :
Discussion
45.

Identify the products A, B and C in the following equation. CH_(3)OH overset("Red P")underset(Cl_(2))rarr A overset("Nal")underset("acetone")rarr B overset(C_(6)H_(5)I)underset("Na and dry ether")rarrC

Answer»

SOLUTION :`A=CH_(3)CL, B=CH_(3)I and C=C_(6)H_(5)-CH_(3)`
Discussion
46.

Identified the reactant A in the following reaction : A+4R-X rarr R_(2)N^(+)X^(-)

Answer»

Solution :a) `NH_(3)+4R-X rarr R_(4)N^(+)X^(-)` Here A is Amonia `rarr(NH_(3))`
Discussion
47.

Identification of anode and cathode in an Galvanic cell is made by the use of

Answer»

GALVANOMETER
SALT BRIDGE
voltmeter
none

SOLUTION :The direction of deflection DECIDES the nature of electrode .
Discussion
48.

Identification of anode and cathode in an electrochemical cell is made by the use of :

Answer»

Galvanometer
Salt bridge
Voltmeter
None

Answer :A
Discussion
49.

Identfiy compound (A) in the following oxidation reaction.

Answer»




All of these

ANSWER :D
Discussion
50.

Idenity (A),(B) and (c ) A + dii H_(2)SO_(4) rarrbrown colour vapour turning (KI + statuck )paper blue A + NaOH overset(Delta)NH_(3)gas (A) overset(Delta)rarr (B)(gas) +(C) (gas, but liquid aty room temperature) b. CO_(2) and SO_(2) both turn line water mily how will you detect the presentif turn both are present in a mixture ? c. (A),(M_(2) X.7H_(2)O) has water and M_(2)X(M is any divalent anion ) in 1.1 ratio by weight K_(2)Cr_(2)PO_(3)H^(Theta)solution green idenlity (A) unit explain reaction d. (A),(Black) + dil. H_(2)SO_(4) rarr (B ) (gas)+ (C ) (light green colour solution ). Gas (B) turns lead actate leat acetrepaper black .What are (A) ,(B) and (C ) ?

Answer»

Solution :a. `NH_(3)NO_(2) (B ) M_(2) (C ) H_(2)O`
b. Pass the mixture of gases fiurst into acidifect `K_(2)Or_(2)O_(7)` solution theminto line WATER
If line `K_(2)O_(2)O_(3)` solutionturn green`- SO_(2)`
If line water turn milk `- CO_(2)`
c.`(A): Na_(2)SO_(3) .7H_(3)O`
d. `(A) Fes (B) H_(2)S (C )FeSO_(4)`
Discussion