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 the compound Y in the following reaction.

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ANSWER :A
Discussion
2.

Identify the compound Y in the following reaction.

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Solution :Chlorobenzene (Y) is FORMED as the product as a RESULT of SANDMEYER's REACTION.
Discussion
3.

Identify the compound X

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SOLUTION :Due to the absence of any hydrogen at N ATOM and due to strong `+ R` effects of `N(CH_(3))_(2)`, UNDERGOES electrophilic substitution reaction with `HNO_(3)` at para position.
Discussion
4.

Identify the compound which turns black with ammonia solution.

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LEAD chloride
Mercurous chloride
Mercuric chloride
Silver chloride

Solution :`Hg_2Cl_2+2NH_3to`
Discussion
5.

Identify the compound that exhibits tautomerism:

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2-butene
lactic ACID
phenol
2-pentanone.

Answer :D
Discussion
6.

Identify the compound 'D' in the following series of reactions . CH_(3)-overset(CH_(3))overset(|) ( C)H - CH_(2)-CH_(2)- Br overset("alc." KOH)underset(Delta)(to) 'A' overset("(i) Conc." H_(2)SO_(4))underset("(ii)" H_(2)O , Delta)(to) underset("(Major product)") ('D') + underset("(Minor product)")('C') 'B' overset(HI , Delta)underset(-H_(2)O)(to) underset("(Major product)")('D') + underset("(Minor product)")

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`CH_(3)-overset(CH_(3))overset(|) ( C)H- UNDERSET(I)underset(|)( C)H- CH_(3)`
`CH_(3)-overset(CH_(3))overset(|)underset(I)underset(|)( C)-CH_(2)- CH_(3)`
`CH_(3)-overset(CH_(3))overset(|)( C)H-CH_(2)-CH_(2)- I`
`CH_(3)-CH_(2)-overset(CH_(3))overset(|)( C)H-CH_(2)- I`

Solution :
Discussion
7.

Identify the compound 'B' in the following series of reaction propanenitrile overset("Alc. Na") to A overset(NaNO_(2))underset("dil. HCl")to B

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n-propyl CHLORIDE
PROPANAMINE
n-propyl ALCOHOL
Isopropyl alcohol

ANSWER :C
Discussion
8.

Identify thecompound B in the following series of reaction. Propanenitrile overset("Na/Alc.")rarr A underset("dil. HCl")overset(NaNO_(2))rarr B

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n-propyl chloride
propanamine
n-propyl alcohol
isopropyl alcohol

Answer :A::C
Discussion
9.

Identify the compound A that gives each the following products on oxidative cleavage with HIO_(4). a. PhCHO+MeCOMe b. Cyclopentanone + HCHO c. 2HCHO+HCOOH d. 5HCOOH+HCHO e. 3HCOOH+2HCHO+CO_(2)

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SOLUTION :a.
B.
c.
d.
e. There are two POSSIBILITIES:
i. First possibility:

II. Second possibility:
Discussion
10.

Identify the compound A,B and C in the following reactions. CH_(3)-Br overset(Mg//"ether")to(A) underset((ii)"Water")overset((i)CO_(2))to(B) underset(Delta)overset(CH_(3)OH//H^(+))to(C)

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SOLUTION :`underset("Bromomethane")(CH_(3)-Br) overset(Mg//ether)to underset("Methylmag. Bromide (A)")(CH_(3)-MgBr) underset((ii)H_(2)O)overset((i)CO_(2))to underset("ETHANOIC acid (B)")(CH_(3)-overset(O)overset(||)(C)-OH) underset(("ESTERIFICATION")) overset(CH_(3)OH//H^(+),Delta)to underset("METHYL ethanoate (C)")(CH_(3)-overset(O)overset(||)(C)-OCH_(3))+H_(2)O`
Discussion
11.

Identify the compound and explain whether it is reduicng or non - reducing or non - reducing sugar for the following structure.

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Solution :(i) Lactose is disaccharide found in milk of mammals and hence it is referred to as milk SUGAR.
(II) On hydrolysis, it YEILDS galactose and GLUCOSE. The `beta-D` galactose and `beta-D` glucose are linked by `beta-1, 4-` glycosidic bond. The aldehyde carbon is not involved in the glycosidic linkage. Hence it retains its reducing property and is called a reducing sugar.
(iii) Structure of lactose :
Discussion
12.

Identify the complexes which are expected to be coloured. Explain, (a) (i) [Ti(NO_(3))_(4)] (ii) [Cu(NC CH_(2))_(4)]^(+) BF_(4)^(-) (iii) [Cr(NH_(3))_(6)]^(3+)3Cl, (iv) K_(3)[VF_(6)] (b) Complete and balance the following reactions. (i) [MnO_(4)]^(2-) + H^(+) to ............... + [MnO_(4)]^(-) + H_(2)O (ii) Ca_(5)(PO_(4))_(2)F + H_(2)SO_(4) + H_(2)O overset("heat")to............... + 5CaSO_(4).2H_(2)O + ............. (iii) SO_(2)(aq) + CrO_(7)^(2-) + 2H^(+) to ............... + ........... +........... (iv) Sn + 2KOH + 4H_(2)O to.......... + .......... (c ) Give reasons for the following: Although aluminium is above hydrogen in the electrochemical series, it is stable in air and water.

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Solution :(a) (iii)
(b) (i) `3MnO_(4)^(2-) + 4H^(-) to MnO_(2) + 2MnO_(4)^(-) + 2H_(2)O`
(b) (i) `3MnO_(4)^(2-) + 4H^(-) to MnO_(2) + 2MnO_(4)^(-) + 2H_(2)O`
(II) `Ca_(5)(PO_(4))_(2)F+H_(2)SO_(4) + H_(2)O overset("heat")to H_(3)PO_(4) + 5CaSO_(4).2H_(2)O + HF`
(iii) `SO_(2)(aq) + CrO_(7)^(2) + 2H^(+) to SO_(4)^(2-) + 2Cr^(3+) + H_(2)O`
(IV) `SN + 2KOH + 4H_(2)O to K_(2)[Sn(OH)_(6)] + 2H_(2)`
(c ) Due to formation of oxide layer.
Discussion
13.

Identify the complexes which are expected to be coloured. Give explanation.

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`[Ti (NO_(3))_(4)]`
`[Cu(NCCH_(3))]^(+) BF_(4)`
`[Cr (NH_(3))_(6)]^(3+) 3CI^(-)`
`K_(3)[VF_(6)]`

SOLUTION :`In [Ti(NO_(3))_(4)]`, O. N. of Ti is +4.
Hence, in Ti (IV) (1s_(2),2S^(2), 2p^(6),3S^(2), 3p^(6))` incomplete d-orbital is not present. So, ITIS colourlese.
(B) In [Cu(NCCH_(3))]^(+) BF_(4), O. N. of Cu is +1. Hence, in Cu(I)`[1s^(2), 2s^(2), 2p^(6) 3s^(2), 3p^(6), 3d^(10)]`incomplete d-orbital is not present. So it is also colourless
(C) In `Cr(NH_(3))_(6)]^(3+) 3CI^(-), O.N. of Cr is +3`. Hence, in Cr(III) `(1s^(2), 2s^(2), 2p^(6),3s^(2), 3p^(6) 3d^(3)` incomplete d-orbitals are present. So, it is coloured
(D) In `K_(3) [VF_(6)).O.N. of Vis +3. Hence, in V(III) `(1s^(2), 2s^(2) 2p^(6) 3s^(2), 3p^(6), 3d^(2))` incomplete d-orbital is present, so it is coloured
Hence, (C) and (D) are the correct answers.
Discussion
14.

Identify the complexes which are expected to be coloured

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`[Ti(NO_(3))_(4)]`
`[Cu(NC CH_(3))_(4)]^(+)BF_(4)^(-)`
`[Cr(NH_(3))_(6)]^(3+)3Cl^(-)`
`K_(3)[VF_(6)]`

Solution :Only those complexes are COLOURED in which the central metal ion has incompletely filled d-subshell.
`{:("Complex","Central ion","Outer metal ion configuration","Colour"),(Ti(NO_(3))_(4),Ti^(4+),3d^(0)4S^(0),"colourless"),([Cu(NC CH_(3))_(4)]^(+)BF_(4)^(-),Cu^(+),3d^(10)4s^(0),"colourless"),([Cr(NH_(3))_(6)]^(3+)3Cl^(-),Cr^(3+),3d^(3)4s^(0),"coloured"),(K_(3)[VF_(6)],V^(3+),3d^(2)4s^(0),"coloured"):}`
Discussion
15.

Identify the complexes expected to be coloured and explain Ti(NO_(3))_(4)[Cr(NCCH_(3))_(4)^(+) BF_(4) (iii) [Cr(NH_(3))_(6)]Cl_(3)(iv) K_(3)[VF_(6)]

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SOLUTION :(C) and (D) are COLOURED because `Cr^(3+)` in `[Cr(NH)_(3)_(6)]^(3+)` and `V^(3+) in `[VF_(6)]^(3-)` has unpaired ELECTRON in d-sub-shell.
Discussion
16.

Identify the complexes which are expected to be coloured.

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`Ti(NO_(3))_(4)`
`[Cu(CH_(3)CN)_(4)]^(+)`
`[Cr(NH_(3))_(6)]^(3+)`
`K_(3)[VF_(6)]`

Solution :`Ti^(4+)=3d^(0)""Cu^(+)=3d^(10)`
`Cr^(3+)=3d^(3)""V^(3=)=3d^(2)`
IONS with UNPAIRED electrons are expected to be coloured.
Discussion
17.

Identify the combination of compounds that undergo aldol condensation followed by dehydration to produce but-2-enal.

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methanal and ETHANAL
two mols of ethanal
methanal and propanone
ethanal and propanone

Solution :`underset("Ethanal")(2CH_(3)CHO) underset(("Aldol condensation"))overset("DIL. NAOH")to CH_(3)-CHOH-CH_(2)CHO underset(-H_(2)O)overset(H^(+),Delta)to underset("But-2-enal")(CH_(3)CH=CHCHO)`
Discussion
18.

Identify the colourless complexes

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`TI(NO_(3))_(4)`
`[Cu(NC CH_(3))_(4)]^(+) BF_(4)^(-)`
`[Cr(NH_(3))_(6)]Cl_(3)`
`K_(3)[VF_(6)]`

ANSWER :A::B
Discussion
19.

Identify the class of drug used in curing disease produced by infection?

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antioxidant
antibitic
antacids
sedative

Answer :B
Discussion
20.

Identify the class of drug : Aspirin

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SOLUTION :ANALGESICS and ANTIPYRETIC
Discussion
21.

Identify the class of drug : Phenelzine (Nardin)

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SOLUTION :ANTIDEPRESSANT DRUG
Discussion
22.

Identify the class of drug : Cimetidine

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SOLUTION :ANTIHISTAMINE
Discussion
23.

Identify the chiral molecule/molecules:

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Solution :AD
Chiral MOLECULES do not have PLANE of SYMMETRY
Discussion
24.

Identify the chiral species amongthe following :1

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ANSWER :A
Discussion
25.

Identify the binary mixture(s) that can be separated into individual compounds by differential extraction, as shown in the given scheme.

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`C_(6)H_(5)OH` and `C_(6)H_(5)COOH`
`C_(6)H_(5)COOH` and `C_(6)H_(5)CH_(2)OH`
`C_(6)H_(5)CH_(@)OH` and `C_(6)H_(5)OH`
`C_(6)H_(5)CH_(2)OH` and `C_(6)H_(5)CH_(2)COOH`.

Solution :(a) `C_(6)H_(5)OH` and `C_(6)H_(5)COOH` cannot be separated by `NaOH (AQ)`. Therefore, this option is not possible.
(b) `C_(6)H_(5)COOH` REACTS with both `NaOH (aq)` and `NaHCO_(3) (aq)` whereas `C_(6)H_(5)CH_(2)OH` does not. This option is possible.
(c) `C_(6)H_(5)CH_(2)OH` and `C_(6)H_(5)OH` both do not react with `NaHCO_(3) (aq)`. therefore, this option is not possible.
(d) `C_(6)H_(5)CH_(2)COOH` reacts with both `NaHCO_(3) (aq)` and `NaOH (aq)` whereas `C_(6)H_(5)CH_(2)OH` does not. Therefore, this option is possible.
Discussion
26.

Identify the binary mixture (s) that can be spearated into individual compounds, by differential extraction, as shown in the given scheme.

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`C_(3)H_(5)OH"and" C_(6)H_(5)COOH`
`C_(6)H_(5)COOH"and"c_(6)H_(5)CH_(2)OH`
`C_(6)H_(5)CH_(2)OH "and"C_(6)H_(5)OH`
`C_(6)H_(5)CH_(5)OH"and" C_(6)H_(5)CH_(2)COOH`

ANSWER :B::D
Discussion
27.

Identify the binary mixtures (s) that can be separated into the individual compounds, by differential extraction, as shown. In the given scheme-

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`C_(6)H_(5)OH` and `C_(6)H_(5)COOH`
`C_(6)H_(5)COOH` and `C_(6)H_(5)CH_(2)OH`
`C_(6)H_(5)CH_(2)OH` and `C_(6)H_(5)OH`
`C_(6)H_(5)CH_(2)OH` and `C_(6)H_(5)CH_(2)COOH`

Solution :Acidic strength order of some organic COMPOUNDS
`C_(6)H_(5)COOH,C_(6)H_(5)CH_(2)CO_(2)HgtH_(2)CO_(3)gtC_(6)H_(5)OHgtH_(2)OgtC_(6)H_(5)CH_(2)OH`
(A) `C_(6)H_(5)OH,C_(6)H_(5)COOHrarr`separated by `NaHCO_(3)` only but not by NaOH`
(B) `C_(6)H_(5)COOH,C_(6)H_(5)CH_(2)OHrarr` sparated by `NaHCO_(3) & NaOI I` both.
(C) `C_(6)H_(5)CH_(2)OH,C_(6)H_(5)OHrarr` separated by `NaOH` only but npt nu `NaHCO_(3)`
(D) `C_(6)H_(5)CH_(2)OH,C_(6)H_(5)CH_(2)COOHrarr` separated by `NaHCO_(3) & NaOH` both.
Discussion
28.

Identify the binary mixtrues (s) that can be separated nto the individual compounds, by differential extraction, as shown in the given scheme-

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`C_(6)H_(5)OH and C_(6)H_(5)COOH`
`C_(6)H_(5)COOH and C_(6)H_(5)CH_(2)OH`
`C_(6)H_(5)CH_(2)OH and C_(6)H_(5)OH`
`C_(6)H_(5)CH_(2)OH and C_(6)H_(5)CH_(2)COOH`.

ANSWER :B::D
Discussion
29.

Identify the artificial sweeteners.

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Saccharin, SUCRALOSE
culutaric acid, glycollic acid
BHT, BHA
GTN, TNG

SOLUTION :Saccharin, sucralose
Discussion
30.

Identify the allylic alcohols in the above (ii) and (vi) are allylic alcohols

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SOLUTION :(II) and (VI) are ALLYLIC ALCOHOLS
Discussion
31.

Identify the amine which cannot be prepared by Gabriel phthalimide synthesis

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Discussion
32.

Identify the allylic alcohols in the above examples.

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SOLUTION :ALLYLIC ALCOHOLS (II) and (VI)
Discussion
33.

Identifythealloycontaininganon -metalasaconstituent init

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INVAR
STEEL
Bellmetal
BRONZE

SOLUTION :Steelcontainsthe non-metal CARBON.
Discussion
34.

Identify the alkyne in the following sequence of reactions "Alkyne" underset"Lindlans catalyst"overset(H_2) to A overset"Ozonolysis"to underset"only"B underset"Process"overset"Weaker" larr CH_2=CH_2

Answer»

`H_3C-C-=C-CH_3`
`H_3C-CH_2-C-=CH`
`H_2C=CH-C-=CH`
`HC-=C-CH_2-C-=CH`

ANSWER :A
Discussion
35.

Identify the alloy containing a non - metal as a constituent in it.

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Invar
STEEL
Bell METAL
Bronze.

Answer :B
Discussion
36.

Identify the addition polymer that would be produced from 2-chloro-2-butene.

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ANSWER :A
Discussion
37.

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

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SOLUTION :

Discussion
38.

Identify structure of (X) :

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ANSWER :D
Discussion
39.

identify structure of major product :

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ANSWER :C
Discussion
40.

Identify structure of compound (D).

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SOLUTION :
Discussion
41.

Identify structure of product P :

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ANSWER :D
Discussion
42.

CH_3 -CH_2 - CH_2- Br overset(Alc.KOH)toCH_3-CH =Br overset(HBr)to CH_3 - overset(Br) overset(|)(CH) -CH_3

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X = dilute NaOH, `20^@C` , Y = HBr/acetic acid, `20^@C`
X = CONCENTRATED alcoholic NaOH, `80^@C` , Y = HBr/acetic acid, `20^@C`
X = dilute NaOH, `20^@C` , Y` = HBr//CH_3 , 0^@C`
X = Concentrated alcoholic NaOH, `80^@C , Y = HBr//CHCl_3,0^@C`

Solution :`CH_3 - CH_2 - oversetunderset(|)(Br)(C )H_2 underset(-KBr)overset(ALC KOH)(to) H_3C- CH = CH_2 overset(HBr)(to) H_3C - oversetunderset(|)(Br)(C )H - CH`
Discussion
43.

Identify salts (A)and(B)based on following reactions:

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Solution :(A): `NH_(4)NO_(2)` (B): `NH_(4)NO_(3)` (C): `N_(2)`, (D): AIN (E): `N_(2)O`
Discussion
44.

Identify relation that is incorrect

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ANSWER :C
Discussion
45.

Identify reactions that correctly match with their products:

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Solution :(A) `SOCl_(2)` GIVES retention in configuration
(B) Hoffmann product
(C) Hoffmann product
(D) `E_(1) CB`
Discussion
46.

Identify reactions that correctly match with their products?

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Solution :(A) Most STABLE cation
(B) More SUBSTITUTED alkene FINAL PRODUCT.
Discussion
47.

Identify reaction type: _(13)^(27)Al+_(1)^(2)H rarr _(13)^(28)Al+_(1)^(1)H

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<P>(d,p)
(p,p)
(p,d)
NONE of these

Answer :A
Discussion
48.

Identify reactant (X) in the given reaction sequence. CH_(3)COCH_(3)+X to (CH_(3))_(3)C-OMg-Cl overset(H_(2)O) to(CH_(3))_(3)C-OH+Mg{:(" OH"),("/"),("\"),(" Cl"):}

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`CH_(3)MGCL`
`CH_(3)COCl+Mg`
`MgCl_(2)`
`CH_(3)CH_(2)MgCl`

ANSWER :A
Discussion
49.

Identify 'Q' in the following sequence of reactions:

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SOLUTION :
Discussion
50.

Identify .Q. in the following sequency of reactions :

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SOLUTION :
Discussion