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 allylic alcohol in the above examples.

Answer»

SOLUTION :ALLYLIC ALCOHOLS : (II) and (VI).
Discussion
2.

Identify all the possible products in the given reaction. One or more options may be correct. CH_(3)-C -=CH + Me_(3)C - Br overset(NaNH_(2))to ? (1) Me_(3) - C - C -= C - Me(2) Me_(2)C = CH_(2) (3) Me_(3)C - CH_(2)- C -= CH(4) CH_(3)C -= CH

Answer»

SOLUTION :`underset("Acidic Hydrogen")underset("Terminal alkyne")(CH_(3) - C -=overset(delta-)(CH^(delta+)))overset(NaNH_(2))to underset("Propynide anion")(CH_(3)- C -= bar(C) - Na^(+))`
Propynide anion can act as nucleophile and also as a base.
`Me_(3)-C-Br` (tert. butyl bromide) is a tertiary (`3^(@))` halide , which prefers elimination over SUBSTITUTION.
`CH_(3)- underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-Br + underset("as base")(CH_(3) - C -= to underset ("Elimination Product" ("Major"))(CH_(3)-overset(CH_(3))overset(|)C = CH_(2)) + CH_(3) - C -= CH`

Hence the CORRECT options are (1), (2) and (4).
Discussion
3.

Identify all the possible monochloro structural isomers expected to be formed on free radical monochlorination of (CH_(3))_(2)CHCH_(2)CH_(3).

Answer»

Solution :The given molecule, there are four different types of hydrogen atoms. Thus four PRODUCTS are obtained by REPLACEMENT of these hydrogen atoms :
`(CH_(3))_(2)CHCH_(2)CH_(2)CL "" (CH_(3))_(2)CHCH(Cl)CH_(3)`
`(CH_(3))_(2)C(Cl)CH_(2)CH_(3) "" CH_(3)CH(CH_(2)Cl)CH_(2)CH_(3)`
Discussion
4.

Identify all the possible monochloro structural isomers that would be expected to form on free radical chlorination of (CH_(3))_(2)CHCH_(2)CH_(3).

Answer»

Solution :In the GIVEN COMPOUND, there are four sets of different types of hydrogen atoms as shown. The replacement of any ONE of the equivalent hydrogens of each set will GIVE the following four monochloro derivatives. `overset(1)(C)H_(3)-underset(underset(1)(C)H_(3))underset(|)overset(2)(C)H-overset(3)(C)H_(2)-overset(4)(C)H_(3)`
(i) `underset("1-Chloro-2-methylbutane")(Cloverset(1)(C)H_(2)-underset(CH_(3))underset(|)overset(2)(C)H-overset(3)(C)H_(2)overset(4)(C)H_(3))`
(ii) `underset("2-Chloro-2-methylbutane")(overset(1)(C)H_(3)-underset(CH_(3))underset(|)overset(Cl)overset(|)(""^(2)C)-overset(3)(C)H_(2)overset(4)(C)H_(3))`
(iii) `underset("2-Chloro-3-methylbutane")(CH_(3)-underset(CH_(3))underset(|)overset(3)(C)H-underset(Cl)underset(|)overset(2)(C)H-CH_(3))`
(IV). `underset("1-Chloro-3-methylbutane")(CH_(3)-underset(CH_(3))underset(|)overset(3)(C)H-overset(2)(C)H-overset(1)(C)H_(2)-Cl)`
Discussion
5.

Identify aliphaticbiodegradablepolyester whichis usedin packingand orthopaedicdevices . (i) Writeitsfull form. (ii) Give the structures of monomer ofnylon 6.

Answer»

Solution :The aliphaticbiodegradablepolyester whichis used in packagingand ORTHOPAEDIC DEVICES in PHBV.
(i) Its fullformis Poly b - hydroxybutyrate - CO- b-hydroxyvalerate.
(ii)The monomers involvedin this polymer are :
`underset("3-Hydroxybutanoicacid")(CH_(3) - CH(OH)CH_(2)COOH) andunderset("3-Hydroxpentanoic acid")(CH_(3)CH_(2)CH(OH)CH_(2)COOH)`
Discussion
6.

Identify A,B,C,D,E,R and R^(1) in the following: (ii) R-Br+Mg overset("dry ether")(rarr)C overset(D_(2)O)(rarr) CH_(3)underset(D)underset(|)(C)HCH_(3).

Answer»

Solution :`overset("Cyclohexylmagnesium bromide Cyclohexane")(R IMPLIES CH_(3)-overset(|)(C)H-CH_(3)("ISOPROPYL GROUP"))`
Discussion
7.

Identify acetaldoxime

Answer»

`CH_3CH=N-NH_2 `
`CH_3 CH = N - OH`
`(CH_3)_2C=N-OH`
`CH_2=N-OH`

ANSWER :B
Discussion
8.

Identify (A),(B),(C ),(D) and (E ), (A) (black) + dil HCI overset(Delta) to (B) (solution) + (C ) (gas) ( C) turns lead aceetain paper black , (B) gives orange ppt (D ) solution in excess of KI forming (E ).

Answer»

SOLUTION :(A) `HgS` (B) `HgCI_(2)` (C ) `H_(2)S` (D) `HgI_(2)` (E ) `K_(2)HgI_(4)`
Discussion
9.

Identify A,B,C,D,E and F in the following: Eleftarrow^(H_2O) D leftarrow_(Dry ether)^(Mg) CH_3-underset(F) underset(downarrow NaOC_2 H_5)underset(CH_3) underset|CH-CH_2-Br to^(alcoholic KOH) A leftarrow^(HBr)underset Cunderset(Na//dry ether downarrow)B

Answer»

SOLUTION :A= `CH_3- UNDERSET(CH_3)underset|C=CH_2` B=`CH_3-underset(CH_3)underset|CBr-CH_3`
C =
`D=CH_3-underset(CH_3)underset|CH-CH_2MgBr`
`E=CH_3-underset(CH_3)underset|CH-CH_3` `F=CH_3-underset(CH_3)underset|CH-CH_2OC_2H_5`
Discussion
10.

Identify A,B,C,D and E in the following sequency reaction. CH_(3)-overset(O)overset(||)(C)-OHoverset(PCl_(5))(to) [A] overset(H_(2)Pd//BaSO_(4))(to) [B] underset(Delta)overset("dil" NaOH)(to)[C]underset(H_(2)O^(+))overset(NaOH)(to)[D]underset("Excess")overset("Red" P//Br_(2))(to)[E]

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SOLUTION :
Discussion
11.

Identify (A),(B),(C),(D), and (E), in the following reactions :

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SOLUTION :
Discussion
12.

Identify A,B,C with proper explanation.

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SOLUTION :N//A
Discussion
13.

Identify (A),(B),(C ) and (D) in the following : Colourless salt (A) + "conc" H_(2)SO_(4) rarrbrawn fames intensifled on adding Cu turnings Aqueous solution (A) + Cu rarr blue colour solution (B) and metal (C ) Aquneous soluytion (A) + HCI rarr white ppt soluble in equeous NH_(3) forming (D)

Answer»

SOLUTION :(A) `AgNO_(3)`(B) `Cu(NO_(3))_(2)`
(C ) `AG` (D) `[AG(NH_(3))_(2)CI]`
Discussion
14.

Identify A,B,C and D CH_(3)-NO_(2)overset(LiAlH_(4))(to) A overset(2CH_(3)CH_(2)Br)(to) Boverset(H_(2)SO_(4))(to)C

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SOLUTION :
Discussion
15.

Identify A,B,C, and D C_(2)H_(5)Br+KOH(aq)to[A]overset(CaOCl_(2))to[B]overset(Ag)to[C]underset(H^(+))overset(Hg^(2+))to[D]

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SOLUTION :.
Discussion
16.

Identify (A),(B),(C ) and (D) and examplereactions . (A) (green coloured salt) + K_(2)Cr_(2)O_(7) + "conc" H_(2)SO_(4) overset(Delta) to(B) (B) (redidish brown gas) + NaOH rarr ( C) (C ) + (CH_(3)COO)_(2)Pb rarr (D ) (yellow ppt) (A) +NaOH + Br_(2) water overset(Delta) to (C ) (C ) + (CH_(3)COO)_(2) Pb overset(Delta) to (D)

Answer»

Solution :(A) `CrCI_(3)`
(B) `CrO_(2)CI_(2)` [by chromyl-chloride4 REST of `CI^(THETA)]`
(C ): `NaCrO_(4)`
(D): `PbCrO_(4)`
Discussion
17.

Identify (A),(B),(C ),(D) and (E ),

Answer»

SOLUTION :(A)`NH_(4)NO_(2)` (B) `NH_(3)`
(C )` NaNO_(2)` (D) `N_(1)` (E ) `AIN`
Discussion
18.

Identify A,B,C,….. C_(6)H_(5)Br underset("H_(2)SO_(4)(conc.))overset(H_(2)SO_(4)(conc.))to (A + B) overset(CH_(3)ONa)to (C + D)

Answer»

SOLUTION :
Discussion
19.

Identify (A),(B),(C) and (D). .

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SOLUTION :
Discussion
20.

Identify A,B,C and D

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SOLUTION :
Discussion
21.

Identify A,B,C ,…….. C_(6)H_(5)Cl overset(A)to B (DDT)

Answer»

SOLUTION :A: `CCl_(3)CHO(CHLORAL) B: CCl_(3)CH-(phi-Cl)_(2)`
Discussion
22.

Identify A,B, C and D "Ethanoic acid" overset(SOCl_(2))(rarr)(A) overset(Pd//BaSO_(4))(rarr)(B) overset(NaOH)(rarr)(C) overset(Delta)(rarr)(D)

Answer»

SOLUTION :
Discussion
23.

Identify A,B, C and D aniline + benzaldehyde toAunderset(B)overset(Conc. HNO_(3))(to) C+D.

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Solution :`C_(6)H_(5)NH_(2)+C_(6)H_(5)CHO to UNDERSET(("Schiff.s base")(A)) underset(("Benzal anilime"))(C_(6)H_(5)N=CH)-C_(6)H_(5)underset((B))underset(("Aniline"))(C_(6)H_(5)NH_(2))+underset((D))underset(("Benzaldehyde"))(C_(6)H_(5)CHO)`
Discussion
24.

Identify A,B and C

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SOLUTION :
Discussion
25.

Identify A,B and C

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SOLUTION :
Discussion
26.

Identify A,B and C

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SOLUTION :
Discussion
27.

Identify A to L

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ANSWER :A: `Fe_(2)(SO_(4))_(3)` B: `Fe_(2)(SO_(4))_(3)` solutionC : `BaSO_(4)` D : `Fe(OH)_(3)` E: `FeCI_(3)` F : `Fe_(2)[Fe(CN)_(6)]_(3)` G: `Fe(SCN)_(3)` H : `Fe_(2)O_(3)` I: `SO_(3)`
Discussion
28.

Identify (A) to (H) Mineral (A) overset(dil.H_(2)SO_(4))rarr(B) +(C) +(D) (gas) (D) + (CH_(3)COO)_(2)Pb overset(Delta) toblack ppt (B) + (C )overset((D)) to E (black ppt) separrated from (C ) by fitration (E) + underset(dil)(HNO_(3)) overset(Delta) to (F) (blue colouredsolution) (F )+ K_(4)[Fe(CN)_(6)] rarr chocolate colourer ppt (C ) + K_(3)[Fe(CN)_(6)] rarr blue (H)

Answer»


Answer :A: `CuFeS_(2)` B : `CuSO_(4)` C: `FeSO_(4)` D: `H_(2)S`E: `CUS` F: `Cu(NO_(3))_(2)` G : `Cu_(2)[FE(CN)_(6)]` H: `Kfe^(II)[Fe^(III)(CN)_(6)]` Turnbulls blue
Discussion
29.

Identify A to J: CH_3CHOoverset(dil.NaOH)toCoverset(/_\)toD

Answer»

SOLUTION :
Discussion
30.

Identify A to J: CH_3CH_2CO_2Hoverset((i)I_2//"RedP")underset((ii)H_2O)toB

Answer»

SOLUTION :
Discussion
31.

Identify A to H following . H_(3)C - overset(O)overset(||)(C) - OH overset(SOCl_(2))to (A) underset(BaSO_(4))overset(H_(2)//Pd)to (B) underset(Delta)overset(Dil.NaOH)to(C) overset(Ag_(2)O)to (D) overset(LiAlH_(4)) to (E)(B) overset(HCN) to (F) overset(H_(3)O^(+))to (G) overset(Delta) to (H)

Answer»

SOLUTION :
Discussion
32.

Identify (A) to (G) in the following scheme and name the process. CaCO_(3) overset(Delta) to (A) + (B) gas , (A) + H_(2)O rarr (C ) (C )+B rarr CaCO_(3) + H_(2)O(D) +(C ) overset(Delta) to (E ) gas (E ) + H_(2)O + (B) rarr (F), NaCI + (F) rarr (G) + (D) (G)overset(Delta) to Na_(3)CO_(3) + H_(2)O + (B)

Answer»

Solution :Sheme repersent the solvay process of manufacture of `Na_(2)CO_(3)`
`CaCO_(3)overset(Delta)rarr UNDERSET((A))(CaO)+underset((B)(CO_(2)(G))`
`underset((A))(CaO +) H_(2)O rarr underset((C))(Ca(OH)_(2))`
`Ca(OH)_(2) +CO_(2) rarr CaCO_(3) +H_(2)O`
`underset((D))(NH_(4)CI) + underset((C))(Ca(OH)_(2)) overset(Delta)rarr underset((E))(NH_(3)darr)`
`underset((E))(NH_(3)) + H_(2)O + underset((B))(CO_(2)) rarr underset((F))(NH_(4)HCO_(3))`
`NACI + underset((F))(NH_(4)HCO_(3)) rarr underset((G))(NaHCO_(3)) + underset((D))(NH_(4)CI)`
`2NaHCO_(3) overset(Delta)rarr Na_(2)CO_(3) + H_(2)O +underset((B))(CO_(2))`
Discussion
33.

Identify A to H

Answer»


Answer :A: `FeSO_(4)7H_(2)O` B: `FeSO_(4)` C : `7H_(2)O`
D: `FE[(H_(2)O)_(5)NO]SO_(4)` F: `SO_(2)` G : `SO_(3)` H: `Cr^(2+)` solution
Discussion
34.

Identify A to G in the following. (a) overset(Br_(2)C CI_(4))rarr A overset(KCN)rarr B overset(H_(3)O^(+))rarr C (b) overset(Br_(2)C CI_(4))rarr D overset(KCN)rarr E overset(H_(3)O^(+))rarr G

Answer»


Answer :`(##ALN_CHM_C08_E01_090_A01##)`
`(##ALN_CHM_C08_E01_090_A02##)`
(decarboxylation takes PLACE on heating when there is a keto GROUP at `beta`-POSITION)
Discussion
35.

Identify (A) to (F):{:(underset(hv)overset(Cl_(2))rarr(A)underset((ii)HCO_(3)^())overset((i)DMSO)rarr(B)underset((ii)H_(3)O^(+))overset((i)CH_(3)Mgl)rarr(C)underset(Delta)overset(H_(2)SO_(4))rarr(D) overset(O_(3)//H_(2)O.//Zn)rarr(E)),(""darr{:((i)","BH_(3)-TFH),((ii)","H_(2)O_(2)","OH^(-)):}),("(F)"):}

Answer»

SOLUTION :
Discussion
36.

Identify (A) to (F) in the following series of reactions:

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SOLUTION :
Discussion
37.

Identify A to G

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ANSWER :A: `FeSO_(4)` B: `BaSO_(4)` C : `Fe_(2)O_(3)` D: `SO_(2)` E: `SO_(3)` F: `FeCI_(3)`G : `S`
Discussion
38.

Identify (A) to (F):

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SOLUTION :LBAH (Lithium tri-t-butoxy aluminium hydride) is a weak reducing agent than LAH (Lithium aluminium hydride. ) It reduces ALDEHYDES and ketones to ALCOHOLS and acid halide (ROCX) to ALDEHYDE (R-CHO) at 195 K. Similarly, DBAH [(diisobutyl aluminium hydride `(Me_(2)CHCH_(2))_(2)` AIH reduces esters partially to aldehyde (R-CHO)]
Discussion
39.

Identify A to C CH_3Ioverset(Mg)underset("dry ether")toAoverset(CO_2)toBoverset(H_2O //H^+)toC

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SOLUTION :
Discussion
40.

Identify A to E in the following sequences of operations: CH_(3)CH_(2)COOH underset(Delta)overset(NH_(3))(to)A overset(Br_(2)//KOH)(to)Boverset(HONO)(to) Coverset([O])(to)CH_(3)COOHunderset("Distill")overset(Ca(OH)_(2))(to)Doverset(LiAIH_(4))(to)E.

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SOLUTION :
Discussion
41.

Identify A to F

Answer»


Answer :A: `FeS`B: `H_(2)S` C: `FeSO_(4)` D : `S`E: `CUS`F: `[Cu(NH_(3))_(4)](OH)_(2)`
Discussion
42.

Identify (A) to (F) :

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SOLUTION :
Discussion
43.

Identify A to E in the following frequency of reactions.

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SOLUTION :
Discussion
44.

Identify (A) to (E ) and write chemical equations for the vairous reactions involed .

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Solution :` D.U. "in" A - ((2 NC _ 2 ) - (n_H -n_N) )/2 = (14 - (7-1))/2 = 4^@`
` 4 D.U. is A and C: H ~~ 1:1 ` SUGGEST that (A) contains BENZEN ring . THEREFORE, (A) is anilineltbRgt Reaction : .
Discussion
45.

Identify A to E and explain the reactions involved.

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SOLUTION :The compounds A to E are
`{:(A=CU,,B=Cu(NO_(3))_(2),,C=[Cu(NH_(3))_(4)]^(2+)),(D=CO_(2),,E=CaCO_(3),,F=Cu_(2)[Fe(CN)_(6)]),(G=Ca(HCO_(3))_(2),,,,):}`
The reactions are explained as under :
`CuCO_(3)toCuO+CO_(2)`
`2CuO+CuS to underset((A))(3Cu)+SO_(2)`
`Cu+4HNO_(3)overset("CONC.")to underset((B))(Cu(NO_(3))_(2)+2NO+2H_(2)O`
`underset((B))(Cu^(2+))+NH_(3)to[Cu(NH_(3))_(4)]^(2+)`
`Ca(OH)_(2)+underset((D))(CO_(2))to underset((E))CaCO(3)+H_(2)O`
`CaCO_(3)+H_(2)O+CO_(2)to Ca(HCO_(3))_(2)`
Discussion
46.

Identify A to E.

Answer»

Solution :Reactions are summarised as follows:
i.
ii.DU in (A) `= ((2n_(C) + 2) - n_(H))/(2) = ((5xx2 + 2) - 8)/(2)= 2^(@)`
III.(A) contains `(---COOH)` group (SODA lime reaction), so 1 DU is present in `(---COOH)` group. Therefore, 1 DU WOULD be due to the presence of `(C=C)` bond, since (A) undergoes oxidation.
iv.Proceeding reverse form the oxidation products of (A):

So the possible STRUCTURE of (A):

Reactions:
Discussion
47.

Identify (A) to (E):

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SOLUTION :
Discussion
48.

Identify A to E

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Answer :A: `CrCI_(3)` B: `Cr(OH)_(3)` C: `Na_(2)CrO_(4)` D: `Na_(2)Cr_(2)O_(3)`E: `PbCrO_(4)`
Discussion
49.

Identify A to E

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Answer :A : `CuSO_(4)` B: `BaSO_(4)` C : `HCI` D: `(Cu_(2)I_(2)+ I_(3)^(Theta))` E: `(Cu_(2)I_(2)+ I^(Theta)S_(4)O_(6)^(2))` F:`Cu_(2)[FE(CN)_(6)]`
Discussion
50.

Identify A to E

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SOLUTION :`(A) overset(NaOH Delta) to `(B)`overset(H_(2)O) larr Mg_(3)N_(2)`
`rArr N_(2) has NH_(4)^(o+) ion and (B) is NH_(3)`
`Mg_(3)N_(2) + 6H_(2)O rarr 3Mg(OH)_(2) + 2NH_(3)`
`NH_(4)^(o+) + NaOH rarr Na^(Theta) + NH^(o+) + NH_(3) + H_(2) + H_(2)O`
Resultantsolubleafter `NH_(3)` has escapedcompletelycontains `Na^(o+)` and anior of (A) which alsogivesRingTest of `NO_(3)^(Theta)`
Thus , (A) is `NH_(4)NO_(3)`
`underset((A))(NH_(4)NO_(3)) + NaOH overset(Delta) tounderset((B))(NH_(3) uarr) + NaNO_(3) + H_(2)O`
`- NaNO_(3) +H_(2)SO_(4) rarr NaHSO_(4) + HNO_(3)`
`HNO_(3) rarr H_(2)O +NO`
`[Fe(H_(2)O)_(6)]SO_(4) + NO rarr underset("Brown coloured ring"(C))([Fe(H_(2)O)_(5)NO]SO_(4)+[H_(2)O])`
`underset((A))(NH_(4)NO_(3))overset(Delta)rarr underset((D))(N_(2)O) +underset((E))(2H_(2)O)`
`N_(2)O +H_(2)O rarr underset("Hyponitrocis acid")underset((F))(H_(2)N_(2)O_(2))`
Discussion