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 product D in the following series of reaction CH_3COOH overset(LiAIH_4)to A underset"443 K"overset(H^+)to B overset(Br_2)to C underset"KOH"overset"alc."to D

Answer»

Methane<BR>Alcohol
Acetylene
Benzaldehyde

Solution :`CH_3-COOH OVERSET(LiAlH_4)to CH_3-CH_2-Ohunderset"443 K"overset(H^+)to CH_2=CH_2 overset(Br_2)to undersetunderset(Br)(|)CH_2-undersetunderset(Br)(|)CH_2underset"KOH"overset"alc."to underset"Acetylene"(CH-=CH)+2KBr + 2H_2O`
Discussion
2.

Identify the product (Y) in the following reaction sequence :

Answer»




SOLUTION :The FINAL PRODUCT SHOWS the p-attack.
``
Discussion
3.

Identify the product (s) is/ are formed when 1-methoxy proane is heated with excessHI. Name the mechanism involved in the reaction

Answer»

Solution :1 - METHOXY propane is heated with EXCESS HI,yield two products NAMED asmethyliodide and 1 - iodo proane.


This reaction involves nucliophilic SUBSTITUTION reaction mechanism.`(SN^1)`
Discussion
4.

Identify the product C in the series C_(6)H_(5)NO_(2)overset(Fe//HCl)rarrAunderset(273K)overset(NaNO_(2)+HCl)RarrBunderset(283K)overset(N_(2)O)rarrC

Answer»

`C_(6)H_(5)OH`
`C_(6)H_(5)CH_(2)OH`
`C_(6)H_(5)CHO`
`C_(6)H_(5)NH_(2)`

Solution :
Discussion
5.

Identify the product 'D' in the following sequence of reactions: CH_(3)-CH_(2) -CH_(2)-Cl overset("Alc. KOH")underset(Delta) to 'B' overset(HBr) to C overset(Na)underset("Ether") to D

Answer»

2,2-dimethylbutane
2,3-dimethylbutane
HEXANE
2,4-dimethylpentane

ANSWER :B
Discussion
6.

Identify the product of the reaction : C_(6)H_(5)- COOH underset((ii)H_(2)O)overset((i)LiAIH_(4))to X

Answer»

PHENYL METHANOL
Ethyl BENZENE
1-Phenyl ethanol
Ethyl benzoate

Solution :Phenyl methanol
Discussion
7.

Identify the product C in the series CH_(3)CN overset(Na//C_(2)H_(5)OH)rarr A overset(HNO_(2))rarr B overset(Cu//573K)rarr C

Answer»

`CH_(3)COOH`
`CH_(3)CH_(2)NHOH`
`CH_(3)CONH_(2)`
`CH_(3)CHO`

SOLUTION :`CH_(3)CN overset(Na//C_(2)H_(5)OH)rarr underset([A])(CH_(3)CH_(2)NH_(2))overset(HNO_(2))rarr underset([B])(CH_(3)CH_(2)OH)overset(Cu//573K)rarr underset([C])(CH_(3)CHO)`
Discussion
8.

Identify the product of the reaction PhC-=CM e overset(H_(3)O^(+),Hg^(2+))to?

Answer»

`PhCH_(2)CH_(2)CHO`
`PhCOCH_(2)CH_(3)`
`PhCH_(2)COCH_(3)`
`PhCOCOMe`

ANSWER :B
Discussion
9.

Identify the product C in the series. C_(6)H_(5)NO_(2) overset(Fe//HCl)(rarr) A underset(273 K)overset(NaNO_(2)+HCl)(rarr) B underset(283 K)overset(H_(2)O)(rarr)C

Answer»

`C_(6)H_(5)OH`
`C_(6)H_(5)CH_(2)OH`
`C_(6)H_(5)CHO`
`C_(6)H_(5)NH_(2)`.

SOLUTION :
Discussion
10.

Identify the product "P" formed in the given reaction sequence.

Answer»




SOLUTION :
Discussion
11.

Identify the product "C" in the sequence of the reaction. CH_3CN overset(Na//C_2H_5OH)(to) A overset(HNO_2)(to) B underset(443K)overset(conc.H_2SO_4)(to) C

Answer»

`CH_3CH_2NH_2`
`CH_3CH_2OH`
`CH_2 = CH_2`
`CH_3CHO`

SOLUTION :`CH_2 = CH_2`
Discussion
12.

Identify the product of the given reaction CH_2=CH-CH_2-CH_2-COOHoverset(I_2)underset(Na_2CO_3)rarr

Answer»

SOLUTION :
Discussion
13.

Identify the product and its colour when MnO_(2) is fused with solid KOH in the presence of O_(2).

Answer»

`KMnO_(4)`, purple
`K_(2)MnO_(4)`, dark green
`MNO`, colourless
`Mn_(2)O_(3)`, brown

Solution :`2MnO_(2)+4KOH+O_(2) to UNDERSET("dark green")(2K_(2)MnO_(4))+2H_(2)O`
Discussion
14.

Identify the product of the following reaction: CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CH_(2)-Br underset(Delta)overset(EtOH)to

Answer»

SOLUTION :In presence of a weak nucleophile such as ethanol, neopentyl bromide ionizes to form first a `1^(@)` carbocation which rearranges to form the more stable `3^(@)` carbocation. This is then attacked by weak nucleophile ethanol followed by loss of a proton to YIELD ehtyl tert-pentyl ether.
Discussion
15.

Identify the product and its colour when MnO_(2) is fused with solid KOH in the presenceof O_(2) :

Answer»

`KMnO_(4)`, purple
`K_(2)MnO_(4)` , dark GREEN
MnO,COLOURLESS
`Mn_(2)O_(3)` ,brown

Solution :`2MnO_(2) + 4KOH + O_(2) rarr UNDERSET("Pot. manganate (Green)")(2K_(2)MnO_(4))+ 2H_(2)O`
Discussion
16.

Identify the product of the following reaction CH_(3)-CH=CH_(2)underset((ii)D_(2)O)overset((i)H^(+))rarr A

Answer»

`CH_(3)-CH_(2)-CH_(2)OH`
`CH_(3)-UNDERSET(OH)underset(|)CH-CH_(3)`
`CH_(3)-underset(OH)underset(|)CH-CH_(2)-OH`
`CH_(3)-overset(CH_(3))overset(|)C=CH_(2)`

Answer :B::C::D
Discussion
17.

Identify the product (A) in the givenreaction.

Answer»

`(CH_(3))_(2)H_(2)SO_(4)`
`CH_(3)CH_(2)CH_(2)CH_(2)OH`
`(CH_(3))COH`
`CH_(3)CHOHCH_(2)CH_(3)`

SOLUTION :`LiAIH_(4)`is basic in character,the reactionoccurs by ` S_(N)2` mechanismand thenucleophile,i.e,` H^(-)` ion (from`LiAIH_(4))` attacksthe smaller alkyl GROUP .
Discussion
18.

Identify the product 'A ' in the given reaction 2CH_3COOHoverset(MnO)rarrA

Answer»

`CH_3CH_2CHO`
`CH_3-CH_2-OH`
`CH_3COCH_3`
`CH_3-UNDERSET(O)underset(||)C-O-underset(O)underset(||)(C)-CH_3`

ANSWER :C
Discussion
19.

Identify the product A in the following reaction. XeF_6+3H_2OtoA+6HF

Answer»

SOLUTION :`XeO_(3)`.
Discussion
20.

Identify the product A and B formed in the following reaction: CH_(3)-CH_(2)-CH=CH-CH_(3)+CHltoA+B

Answer»

Solution :Since both the carbon atoms of the DOUBLE bond has the same NUMBER of hydrogen atoms (i.e., 1), therfore, Markovnikov's rule cannot be applied. In other words, both the products (A and B) will be formed.
`UNDERSET("Pent-2-ene")(CH_(3)CH_(2)-CH=CH-CH_(3)+HCL) to underset("3-Chloropentane (A)")(CH_(3)CH_(2)-underset(Cl)underset(|)(C)H-CH_(2)CH_(3))+underset("2-Chloropentane (B)")(CH_(3)CH_(2)CH_(2)-underset(Cl)underset(|)(C)H-CH_(3))`
`underset('I' " Stabilized by four hyperconjugationstructures (slightly LESS stable)")(CH_(3)-CH_(2)-overset(+)(C)H-CH_(2)+CH_(3))""underset("II Stabilized by five hyperconjugation structures (slightly more stable)")(CH_(3)CH_(2)-CH_(2)-overset(+)(C)H-CH_(3))`
the amount of 2-chloropentane (B) will be slightly more than that of 3-chloropentane (A), approx. 55:45.
Discussion
21.

Identify the product (A) in following reaction series, CH_3CN overset(Na C_2H_5OH)rarr(X)overset(HNO_2)rarr(Y)overset(o)rarr(Z)overset(T.s ag.)rarr(A)

Answer»

`CH_3CHO`
`CH_3CONH_2`
`CH_3COOH`
`CH_3-CH_2-NHOH`

ANSWER :C
Discussion
22.

Identify the product. A and B

Answer»

SOLUTION :`A=CH_(3)-UNDERSET(O)underset(||)C-CH_(3)overset([O])rarr underset(B)(CH_(3)COOH)`
Discussion
23.

Identify the product A and B.

Answer»

SOLUTION :
Discussion
24.

Identify the product A and B.

Answer»

SOLUTION :
Discussion
25.

Identify the product. A and B

Answer»

Solution :`A=CH_(3)-underset(O)underset(||)C-CH_(3)OVERSET([O])RARR underset(B)(CH_(3)COOH)`
Discussion
26.

Identify the process when an ore is heated inlimited supply of air.

Answer»

`2Cu_(2)S + 3O_(2) to 2Cu_(2)O + 2SO_(2)`
`Fe_(2)O_(3) +3CO to 2Fe+3CO_(2)`
`PbO +C to Pb +CO`
`Al_(2)O_(3) + 3C to 2Al + 3CO`

Answer :C
Discussion
27.

Identify the process to which the following reaction belongs AI_(2) O_(3).2H_(2)O +Na_(2)CO_(3) rarr 2NaAIO_(2) +2H_(2)O +CO_(2) 2NaAIO_(2) +2H_(2)O +CO_(2) overset(50-60^(@)C)rarr AI_(2)O_(3).2H_(2)O +Na_(2)CO_(3)

Answer»

HALL's PROCESS
Baeyer's process
Serpeck's process
None of these

Solution :It is LEACHING of BAUXITE USING Hall's process.
Discussion
28.

Identify the product A and B.

Answer»

SOLUTION :
Discussion
29.

Identify the principal product of the following reaction?

Answer»




SOLUTION :INTRAMOLECULAR ALDOL.
Discussion
30.

Identify the possible structure of X and Y

Answer»




ANSWER :D
Discussion
31.

Which of the following is a positively charged sol?

Answer»

HAEMOGLOBIN (BLOOD)
`As_2S_3`
Clay
Gold sols.

Answer :A
Discussion
32.

Identify the pollutant gases largely responsible for the discoloured and lustreless nature of marble of the Taj Mahal.

Answer»

`O_(3) and CO_(2)`
`CO_(2) and NO_(2)`
`SO_(2) and NO_(2)`
`SO_(2) and O_(3)`

ANSWER :A::B::C::D
Discussion
33.

Identifythe paramgneticspecies

Answer»

`Cu^(+)`
`CR^(+)`
`MnO_(4)^(-)`
`Zn^(2+)`

ANSWER :B
Discussion
34.

Identify the pair In which the specified bond length of first is greater than second. {:(PCl_(3)","PF_(3)Cl_(2),:BL_("P-Cleq")),(SO_(2)Cl_(2)","SO_(2)F_(2),BL_(S=O)),(BF_(3)","BCl_(3),BL_(B-x) X=F//Cl),(NO_(3)^(-)","NO_(2)^(-),BL_(N-O)),(O_(3)","O_(2),BL_(O-O)),(CO","CO_(2),:BL_(C-O)):}

Answer»
Discussion
35.

Identify the pair of epimers in the following.

Answer»

D-Glucose and D-Fructose
D-Glucose and L-Glucose
D-Glucose and D-Mannose
D-Glucose and D-Glucose

Answer :C
Discussion
36.

Identify the oxidation states of titanium (Z=22) and copper (Z=29) in their colourless compounds.

Answer»

`Ti^(3+), CU^(2+)`
`Ti^(2+), Cu^(2+)`
`Ti^(4+), Cu^(1+)`
`Ti^(4+), Cu^(2+)`

Solution :`Ti : [AR] 4S^(2) 3d^(2), Cu:[Ar] 4s^(1) 3d^(10)`
`Ti^(+4):[Ar] 4s^(0) 3d^(0), Cu^(+1): [Ar] 4s^(0) 3d^(10)`
Discussion
37.

Identify the oxidation state of cobalt in [Co(NH_(3))_(5)Cl]^(2+) ?

Answer»

`+2`
`+3`
`+4`
`+5`

ANSWER :B::C
Discussion
38.

Identify the organisation that brokered the Indus water treaty between India and Pakistan.

Answer»

SOLUTION :WORLD BANK
Discussion
39.

Identify the organic compound which, on heating with strong solution of NaOH, partly converted into an acid salt and partly into alcohol

Answer»

benzyl alcohol
acetaldehyde
acetone
benzaldehyde

Solution :Benzaldehyde on treatment with STRONG solution of NaOH, UNDERGOES Cannizzaro.s reaction as
Discussion
40.

Identify the order of reaction from each of the following rate constants? a) k=2.3 xx 10^(-3) L mol^(-1)s^(-1) b) k=1.25 xx 10^(-2)s^(-1) c) k=2.9440 xx 10^(6) mol L^(-1)s^(-1) d) k=2.8 xx 10^(-8) atm^(-1)s^(-1)

Answer»


SOLUTION :CONCEPTUAL PROBLEMS.
Discussion
41.

Identify the ores that can be concentrated by leaching.

Answer»


Answer :ZINCITE (ZNO), bauxite `(Al_2O_3.2H_2) and DIASPORE `(Al_2O_3H_2O)` can be CONCENTRATED by LEACHING with a concentrated solution of NaOH.
Discussion
42.

Identify the order of the reaction from the rate constant K= 2.3 xx 10^(-6) L " mol"^(-1)s^(-1)

Answer»

SOLUTION :ORDER = 2, Or SECOND order, Or 2ND order.
Discussion
43.

Identify the ore not containing iron.

Answer»

LIMONITE
Siderite
Carnallite
CHALCOPYRITES

Solution :`"Limonite" RIGHTARROW 2Fe_(2)O_(3).3H_(2)O`
Siderite `rightarrow FeCO_(3)`
`"Carnallite" rightarrow KCI.MgCI_(2) . 6H_(2)O`
Chalcopyrites or (copper pyrite) `rightarrow CuFeS_(2)`
Discussion
44.

Identify the reaction order from the following rate constant : k=2.3xx10^(-5)" litre mol"^(-1)"sec"^(-1)

Answer»

SOLUTION :SECOND ORDER
Discussion
45.

Identify the order for the following reactions (i) Rusting of Iron (ii) Radioactive disintegration of ._(92)U^(238). (iii) 2A+B rarr products , rate =k[A]^(1//2)[B]^2

Answer»

Solution :(i) `2Fe+underset(("EXCESS"))(3O_2)overset(H_2O("excess"))rarr2Fe_2O_3.xH_2O`
Theoretically order vale may be more than ONE practically one.
(ii) All RADIOACTIVE disintegration are first order reactions
(iii) `2A +3B rarr ` PRODUCTS
rate = `k[A]^(1//2)[B]^2`
Order `=1/2+2=5/2=2.5`
Discussion
46.

Identify the order for the following reactions Radioactive disintegration of ._(92)U^(238)

Answer»

SOLUTION :FIRST ORDER REACTION
Discussion
47.

Identify the order for the following reactions Rusting of Iron

Answer»

SOLUTION :FIRST ORDER REACTION
Discussion
48.

Identify the order for the following reactions 2A+3B rarr products , rate = k [A]^(1//2)[B]^(2)

Answer»

SOLUTION :PSEUDO FIRST ORDER REACTION
Discussion
49.

Identify the order for the following reactions (i) Rusting of Iron (ii) Radioactive disintegration of ""_(92)U^(238) (iii) 2A+B toproducts, rate=k[A]^(1//2)[B]^(2)

Answer»

Solution :`1Fe+underset(("excess"))(3O_(2)) overset(H_(2)O"(excess)") to 2Fe_(2)O_(3). xH_(2)O`
Theoritically ORDER value may be more than one but practically one.
(ii) All radioactive disintegrations are first order reactions
(iii) `2A+3B to ` PRODUCTS
rate `=K[A]^(1//2)[B]^(2)`
Order `=(1)/(2)+2=(5)/(2)=2.5`
Discussion
50.

identify the option which represents the correct products of the following reaction. Ph-CH=O+CH_(3)CH=Ooverset("Dil NaOH")to("Aldols")

Answer»

`Ph-underset(OH)underset(|)CH-CH_(2)-CH=O`
`CH_(3)-underset(CH)underset(|)CH-CH_(2)-CHO`
`CH_(3)underset(OH)underset(|)CH-underset(Ph)underset(|)C=O`
`CH_(3)-underset(OH)underset(|)-underset(OH)underset(CH)-Ph`

Solution :`Ph-CH=O+CH_(3)CH=Ooverset(DIL NaOH)to`
Discussion