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.

Complete the reactions

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SOLUTION :
Discussion
2.

Complete the reaction:CH_3COCl+C_2H_5OHrarr

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SOLUTION :`UNDERSET"(Ethanoyl chloride)"(CH_3COCl)+underset"(ETHANOL)"(C_2H_5OH)rarrunderset"(ETHYL ethanoate)"(CH_3COOC_2H_5+HCl`
Discussion
3.

Complete the reaction: XeF_6 + H_2O rarr overset(?)………… + 2HF

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SOLUTION :`XeOF_(4)`
`XeF_(6) + H_(2)O RARR XeOF_(4) + 2HF`.
Discussion
4.

Complete the reaction XeF_(4)+ O_(2)F_(2)to A+ O_(2). Identify A.

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SOLUTION :`A=XeF_(6)`
Discussion
5.

Complete the reaction. XeF_4 + H_2O to ".........." + 2HF

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SOLUTION :`XeF_4 + H_2O to XeOF_4 + 2HF `
Discussion
6.

Complete the reaction of benzene diazonium chloride with : (i) H_2 O //H_2 SO_4 (ii) CuBr//HBr.

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SOLUTION :
Discussion
7.

Complete the reaction R- overset(O)overset(||)C-CH_3 overset(NaOX)to

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SOLUTION :`to R - OVERSET(O)overset(||)C-ONa + CHX_3`
Discussion
8.

Complete the reaction, (i) Zns+O_(2)overset(Delta)rarr ? (ii) FeS_(2)+O_(2)overset(Delta)rarr?

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Solution :(i) `2ZnS +3O_(2)OVERSET(Delta)rarr2ZnO+2SO_(2)`
(ii) `4FeS_(2)+11O_(2)overset(Delta)RARR 2Fe_(2)O_(3)+8SO_(2)`
Discussion
9.

Complete the reaction: (i) H_(3)BO_(3)underset(373K)(to)A+H_(2)O (ii) Aunderset(413K)(to)B+H_(2)O Bunderset(("Red hot"))(to)C+H_(2)O

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fig

Solution :Boric ACID when heated at 373 K gives metaboric acid (A) and A heated at 413 K it gives tetraboric acid (B).B heated at red HOT it gives boric anhydride (C).
`4H_(3)BO_(3)underset(373K)(to)underset((A))(4HBO_(2))+H_(2)O`
`4HBO_(2)overset(413K)(to)underset((B))(H_(2)B_(4)O_(7))+H_(2)O`
`H_(2)B_(4)O_(7)overset("Red hot")(to)underset((C))(2B_(2)O_(3))+H_(2)O`
Discussion
10.

Complete the reaction: HCHO overset(NaOH(50%))to.

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SOLUTION :`HCHO+HCHO +NAOH(50%) to CH_(3)OH+HCOONa`
Discussion
11.

Complete the reaction: 2HCHO+Con KOHoverset(Delta)rarr

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ANSWER :`2HCHO+KOHrarrCH_3OH+HCOOK`
Discussion
12.

Complete the reaction 2Cl_2+2H_2O+SO_2to

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SOLUTION :`H_2SO_4+2HCl`
Discussion
13.

Complete the reaction: CH_3CHO+H_2N-NH_2rarr

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ANSWER :`CH_3CH_2-COOHoverset(Br_2//RedP)rarrCH_3-CHBr-COOH`
Discussion
14.

Complete the reaction: CH_3CHOoverset(dil.NaOH)rarr

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ANSWER :SEE answer of HSE SAY 2015 (a)
Discussion
15.

Complete the reaction: CH_3CH_2COOHoverset(LiAlH_4//Ether)rarr

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ANSWER :`CH_3CH_2COOHoverset(LiAlH_4//Ether)rarrCH_3-CH_2-CH_2-OH`
Discussion
16.

Complete the reaction: CH_3CH_2COOH+CH_3OHoverset(H^+)

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ANSWER :`CH_3-CH_2-COOH+CH_3OHrarrCH_3_CH_2-COOH+H_2O`
Discussion
17.

Complete the reaction: CH_3CH_2COOHoverset(Br_2//Red P)rarr

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ANSWER :`(##ANE_PKE_CHE_XII_C12_E02_077_S01##)`
Discussion
18.

Complete the reaction: CH_3CH_2COOH+SOCl_2rarr

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ANSWER :`CH_3-CH_2-COOH+SOCl_2rarrCH_3-CH_2-COCl+SO_2+HCl`
Discussion
19.

Complete the reaction CH_(3)CH_(2)-Br+ KOH(alc.) to ….

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SOLUTION :`CH_(3)CH_(2)-BR+ KOH(alc.) to CH_(2)=CH_(2)+ KBr+ H_(2)O`
Discussion
20.

Complete the reaction. CH_(3) - underset(CH_(3))underset(|)-CH_(2)-O_CH_(2)-CH_(3)+HI overset(Delta)to

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`CH_(3) - underset(CH_(3))underset(|)-CH_(2)OH+ CH_(3)CH_(3)`
`CH_(3) - underset(CH_(3))underset(|)-CH_(3)+ CH_(3)CH_(2)OH`
`CH_(3) - underset(CH_(3))underset(|)-CH_(2)OH+ CH_(3)CH_(2)I`
`CH_(3) - underset(CH_(3))underset(|)-CH_(2)-I+ CH_(3)CH_(2)OH`

SOLUTION : `CH_(3) - underset(CH_(3))underset(|)-CH_(2)OH+ CH_(3)CH_(2)I`
Discussion
21.

Complete the reaction {:(CH_(3)-underset(|)CHOH),(CH_(3)-CHOH):}underset(?)overset(HIO_(4))toX is _______

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`CH_(3)COCH_(3)`
`CH_(3)CHO`
`C_(6)H_(5)CHO`
`CH_(3)-underset(CH_(3))underset(|)(C)-CH-CHO`

Answer :B
Discussion
22.

Complete the reaction. CH_3-CH_2-Br+underset("alco")AgCNunderset(/_\)to

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SOLUTION :EXAMPLE : When ethyl BROMIDE is heated with alcoholic silver cyanide solution, ethylisocyanide (ETHYLCARBYLAMINE) is formed.
`CH_3-CH_2-Br+AgCNoverset("alcohol")tounderset("ethylisocyanide")(CH_3-CH_2-NC+AgBr)`
Discussion
23.

Complete the reaction: C_6H_5COCH_3underset(HCl)overset(Zn//Hg)rarr

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ANSWER :`CH_3CH_2COOH+CH_3OHoverset(H^+)<=>CH_3CH_2COOCH_2+H_2O`
Discussion
24.

Complete the reaction : CH_(3)-CH_(2)-CH_(2)-O-CH_(3)-HBr rarr?

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SOLUTION :`CH_(3)-CH_(2)-CH_(2)-O-CH_(3)+HBR rarr CH_(3)-CH_(2)-CH_(2)-OH+CH_(3)BR.`
Discussion
25.

Complete the reaction : C_6 H_5 - NH_2 + Br_2 (aq) to

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SOLUTION :
Discussion
26.

Complete the reaction : C_6 H_5 overset(+)N_2 overset(-)Cl + H_3 PO_2 + H_2 O overset(Cu^+)to

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SOLUTION :`C_6 H_6 + N_2 + H_3 PO_3 + HCL`
Discussion
27.

Complete the reaction and write the names of products. C_(2)H_(5)OH + NH_(3) overset(Al_(2)O_(3))underset(360^(@)C) to?

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SOLUTION :ETHANOL react with ammonia in presence of heated alumina or thoria catalyst at 633 K to form mixture of amines.
`underset("Ethanol")(C_(2H_(5)OH) + NH_(3) overset(Al_(2)O_(3))underset(633 k) to underset("Ethyl amine")(C_(2)H_(5)NH_(2)) overset(C_(2)H_(5)OH) to underset("DIETHYLAMINE") ((C_(2)H_(5))_(2))NH overset(C_(2)H_(5)OH) to underset("Triethyl amine")((C_(2)H_(5))_(3))N)`
Discussion
28.

Complete the reaction

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SOLUTION :
Discussion
29.

Complete the reaction:

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SOLUTION :
Discussion
30.

Complete the reaction

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SOLUTION :
Discussion
31.

Complete the reaction, 2XeF_4 + 3H_2Oto-+6HF.

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SOLUTION :`XeO_(3)`
Discussion
32.

Complete the reaction

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SOLUTION :
Discussion
33.

Complete the reaction:

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SOLUTION :
Discussion
34.

complete the reaction: .

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SOLUTION :
Discussion
35.

Complete the missing rectants (A) and (B) :

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SOLUTION :PROCEED REVERSE :

Discussion
36.

Complete the missing reactant in the following directed aldol synthesis. a. b.

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SOLUTION :a.Prceed REVERSE:

PROCEED reverse:
Discussion
37.

Complete the missing links in the following (i). CH_(3)CH_(2)CH_(2)OHoverset(PBr_(3))to[A]overset(alc.KOH)to[B]overset(HBr)to[C]overset(NH_(3))to[D] (ii). CH_(3)CH_(2)CH_(2)Ioverset(alc.KOH)to[A]overset(H^(+)//H_(2)O)to[B]overset(SOCl_(2))to[C]overset(LiAlH_(4))to[D] (iii). CH_(3)CHBrCH_(3)overset(alc.KOH)to[A]underset("Peroxide")overset(HBr)to[B]underset("Acetone")overset(NaI)to[C]underset("Ether")overset(Mg)to[D]

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SOLUTION :
Discussion
38.

Complete the missing lnks (X), (Y) and (Z)by making an appropriate choice. CH_(3)COOH overset(PBr_(3)//Br_(2))toXoverset(KCN)toYoverset(H_(3)O^(+))toZ

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`{:("X","Y","Z"),(CH_(3)COBr,CH_(3)COCN,CH_(3)COOH):}`
`{:("X","Y","Z"),(BrCH_(2)COOH,UNDERSET(CN)underset(|)CH_(2)COOH,HOOC-CH_(2)COOH):}`
`{:("X","Y","Z"),(BrCH_(2)COOH,CH_(2)(CN)COOH,overset("COOH")underset("COOH")("|")):}`
`{:("X","Y","Z"),(Br_(2)CHCOOH,Br_(2)C(CN)COOH,CH_(3)CH_(2)COOH):}`

Solution :`underset(""underset((Z))(HOOC-CH_(2)COOH)overset(H_(3)O^(+))larrunderset((Y))underset(CN)underset(|)(CH_(2))COOH)(CH_(3)COOHoverset(PBr_(3)//Br_(2))toBr-underset((X))(CH_(2))underset(DARR overset(" ")underset(" ")KCN)(COOH))`
Discussion
39.

Complete the missing links in the following :

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SOLUTION :(i) `[A]CH_(3)COOH,[B]CH_(3)COCL,[C]CH_(3)COOCH_(3)`
(ii) `[A] CH_(3)MGBR[B]CH_(3)COOH[C]CH_(3)COOCH_(3)`
(iii) `[A]CH_(3)CHO[B]CH_(3)COOH[C]CH_(3)COCl`
(IV) `[A] CH_(3)COOH[B]CH_(3)CONH_(2)[C]CH_(3)NH_(2)`
(v) `[A]CH_(3)CN[B]CH_(3)COOH`
(vi) `[A]C_(6)H_(5)MgBr,[B]C_(6)H_(5)COOH[C]C_(6)H_(5)COCl.`
Discussion
40.

complete the missing links in the folloiwng : (i) C_(2)H_(5)overset(Na)rarr[X]underset("Heat")overset(C_(2)H_(5)I)rarr[Y]overset(Cl_(2)(hv))rarr[Z] (ii) C_(2)H_(5)ONaoverset(C_(2)H_(5)I)rarr[X] overset("Excess of HBr")underset((373 K))rarr[Y] overset(KOH(alc.))rarr[Z] (iii) CH_(3)CHBrCH_(3)overset("KOH(alc.)")rarr[X]underset(("Preoxde"))overset("HBr")rarr[Y] overset(CH_(3)ONa)rarr[Z] (v)

Answer»

Solution :`(i) C_(2)H_(5)OHoverset(Na)rarrC_(2)underset([X])(H_(5))ONaoverset(C_(2)H_(5)I)underset("HEAT")rarrC_(2)H_(5)-Ounderset([Y])-C_(2)H_(5)overset(CI_(2)(HV))rarrCI_(5)C_(2)-Ounderset([Z])-C_(2)CI_(5)`
`(ii) C_(2)H_(5)ONaoverset(C_(2)H_(5)I)rarrC_(2)underset([X])(H_(5))OC_(2)H_(5)overset(HBr)underset("Heat")rarrC_(2)underset([Y])(H_(5))Broverset(KOH(alc.))rarrCH_(2)=CH_(2)`
(iii)`CH_(3)CHBrCH_(3)overset(KOH(alc.))rarrCH_(3)underset([X])(CH)=CH_(2)overset(HBr)underset("Pero xide")rarrCH_(3)CH_(2)underset([Y])(CH_(2))Broverset(H_(3)ONa)rarrCH_(3)CH_(2)underset([Z])(CH_(2))OCH_(3)`
(iv)
Discussion
41.

Complete the missing links.

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ANSWER :A
Discussion
42.

Complete the given reaction. 2Mn^(2+)+5ul((i))+8H_2Oto2ul((ii))+10ul((iii))+16H^(+)

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`{:("(i)","(II)","(III)"),(SO_4^(2-),MnO_4^(-),S_2O_8^(2-)):}`
`{:("(i)","(ii)","(iii)"),(S_2O_8^(2-),MnO_4^(-),SO_4^(2-)):}`
`{:("(i)","(ii)","(iii)"),(MnO_4^(-),S_2O_8^(2-),SO_4^(2-)):}`
`{:("(i)","(ii)","(iii)"),(S_2O_8^(2-),SO_4^(2-),MnO_4^(-)):}`

ANSWER :B
Discussion
43.

Complete the follwing reaction equations :(i)(ii) CH_(3)CH_(2)CH=CH_(2)+HBrto

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SOLUTION :(i)<BR> (ii)`CH_(3)-CH_(2)-CH=CH_(2)+HBrtoCH_(3)-CH_(2)-underset(Br)underset(|)CH-CH_(3)`
Discussion
44.

Complete the folowing : .

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Solution :` (##KSV_CHM_ORG_P2_C15_E01_015_S01.png" WIDTH="80%">


AMINO COMPOUNDS are oxidised to `(-NO_(2))` compound by peracid `(RCO_(3)H)`
Discussion
45.

Complete the given equations (i) Mg +2NHO_3(dil)rarrMg(NO_3)_2+P (ii) Cu + 8 HNO_3(dil) rarr3Cu(NO_3)_2+Q+4H_2O (iii) l_2+10HNO_3 (dil) rarrR +10NO_2+4H_2O

Answer»

A-NO, B-`2NO_2`, C-`6NCl_3` , D-`5HIO_3`
A-`H_2` , B-2NO , C-`6NH_4Cl` , D-`2HIO_3`
A-`N_2` , B-`N_2` , C-`NCl_3` , D-HI
A-`NO_2` , B-`N_2O`, C-`2NH_4Cl` , D-3HI

Solution :(i)`underset"(very dilute)"(Mg+2HNO_3) to Mg(NO_3)_2+ underset"(W)"H_2`
(ii)`Cu + underset"(dil.)"(8HNO_3) to 3Cu(NO_3)_2 + underset"(X)"(2NO) + 4H_2O`
(III)`underset"(excess)"(8NH_3) + 3Cl_2 to underset"(Y)"(6NH_4Cl)+N_2`
(IV)`I_2 + 10HNO_3 to underset"(Z)"(2HIO_3) + 10 NO_2 + 4H_2O`
Discussion
46.

Complete the following : XeF_(2) + PF_(5) rarr

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SOLUTION :Due to the presence of three lone pairs of electrons, `XeF_(2)` acts as a fluoride ion donor while due to the presence of vacant `sp^(3)d` orbitals, `PF_(5)` acts as a fluoride ion acceptor. In other WORDS, `XeF_(2)` acts as a Lewis base while `PF_(5)` acts as a Lewis acid to form the corresponding adduct.
`underset("Lewis base")(XeF_(2)) + underset("Lewis acid")(PF_(5)) rarr underset("Adduct")([XeF]^(+)[PF_(6)]^(-))`
Discussion
47.

Complete the follwing:

Answer»

Solution :Intramolecular redox REACTION of o-nitro toluene




Dienone-phenol REARRANGEMENT reaction : when 4,4-dialkyle cyclohexadienone is trated with acid, it is convereted to phenole with the migration of one of the alkyle groups to the adjacent C atom.

A reverse rearrangement, i.e. phenole-dienone rearrangement, TAKES place during the SE reactions in phenols (SEE part (m) above).
Discussion
48.

Complete the following. Write down the structure ofB. (i) CH_3-CH_2-CO-CH_3 overset(Zinc amalgam//HCl)rarrB

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ANSWER :`CH_3CH_2COCH_3 OVERSET(ZINC amalgam//HCl)rarrCH_3CH_2CH_2CH_3` (Clemmenson REDUCTION)
Discussion
49.

Complete the following. Write down the structures of A, B and C. (i) CH_3-CH_2-CHO overset(KMnO_4)rarrA

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ANSWER :`CH_3CH_2CHO OVERSET(KMNO_4)rarrCH_3CH_2COOH`
Discussion
50.

Complete the following. Write down the structure of C. (i) CH_3-CH_2-CH_2-COOH overset(Bromine//Red P)rarrC

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<P>

ANSWER :`CH_3CH_2CH_2COOH OVERSET(Bromine//Red P)rarrCH_3CH_2-CHBr-COOH` (HVZ REACTION)
Discussion