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.

CH_(3)C-=C CH_(3) underset((ii)H_(2)O //Zn)overset((i)X)to H_(3)C underset(O)overset(C)(||)-underset(O)overset(C)(||)CH_(3) In the above reaction X is

Answer»

`HNO_(3)`
`O_(2)`
`O_(3)`
`KMnO_(4)`

SOLUTION :
Discussion
2.

CH_3C-=C CH underset((ii)H_2O // Zn)overset((i)X)to CH_3-undersetunderset(O)(||)C-undersetunderset(O)(||)C-CH_3 X in the above reaction is

Answer»

`HNO_3`
`O_2`
`O_3`
`KMnO_4`

SOLUTION :`CH_3-C-=C-CH_3underset((II)Zn//H_2O)OVERSET((i)O_3)to CH_3-undersetunderset(O)(||)C-undersetunderset(O)(||)C-CH_3`
Discussion
3.

CH_3Br overset(KCN)(to) (A) overset(H_3O^+)(to) (B) overset(PCl_5)(to) (C ) product (C ) is

Answer»

acetylchloride
chloro acetic ACID
`alpha` - chlorocyano ethanoic acid
none of these

Solution :`CH_3Br OVERSET(KCN)(to) CH_3CN overset(H_3O^+)(to) CH_3COOH underset(PCl_5)(to) CH_3- oversetunderset(||)(O)(C ) - CL`
Discussion
4.

CH_(3)Br+Nu^(-) to CH_(3)-Nu+Br^(-). The decreasing order of the rate of the above reaction with nucleophiles (Nu^(-)) A to D is [Nu^(-)=(A)PhO^(-), (B)AcO^(-), (C)HO^(-), (D)CH_(3)O^(-)]

Answer»

`AgtBgtCgtD`
`BgtDgtCgtA`
`DgtCgtAgtB`
`CgtCgtBgtA`

Solution :The acid character follows the order:
`CH_(3)COOHgtC_(6)H_(5)OHgtH_(2)OgtCH_(3)OH`
The BASIC character will follows the order
`CH_(3)COO^(-)ltC_(6)H_(5)O^(-)ltOH^(-)ltCH_(3)O^(-)`
The stronger the acid, the WEAKER the conjugate base formed.
Discussion
5.

CH_(3)Br+Nu^(-)rarrCH_(3)Nu+Br^(-) The decreasing order of the rate of the above reaction with nucleophiles (Nu^(-)) I to IV is : [Nu^(-)=(I)PhO^(-),(II)AcO^(-),(III)HO^(-),(IV)CH_(3)O^(-)]

Answer»

`IVgtIIIgtIIgtI`
`IgtIIgtIIIgtIV`
`IIgtIVgtIIIgtI`
`IVgtIIIgtIgtII`

Solution :The reaction follows `S_(N)2` mechanism so STRONGER the BASE, the better its nucleophilicity as :
`CH_(3)O^(-)gtOH^(-)gtPhO^(-)gtAcO^(-)`
Discussion
6.

(CH_(3))_(4)N^(+) is neither an electrophile, nor nucleophilic because it

Answer»

Does not have electron pair for donation as well as can not attract electron pair
neither has electron pair avaible for donation nor can accommodate electron SINCE all shells of N are fully occupied
can ACT as Lewis acid and base
None of these

Solution :The octet around N is complete, hence it has no ELECTROPHILIC character.N has no UNSHARED pair of electrons to acts as nuclaophilic.
Discussion
7.

(CH_3)_3SiOH is more acidic than (CH_3)_3COH, even though carbon is more electronegative than silicon-explain.

Answer»

SOLUTION :Because of d-orbital resonance, the conjugate BASE of `(CH_3)_3Si OH` is RELATIVELY more STABLE,
Discussion
8.

(CH_3)_3CONa on reaction with CH_3Br will give :

Answer»

`(CH_3)_3COC(CH_3)_3`
`CH_3OCH_3`
`CH_3CH_2OCH_2CH_3`
`(CH_3)_3COCH_3`

ANSWER :D
Discussion
9.

(CH_(3))_(3)CMgCl on reaction with D_(2)O produces :

Answer»

`(CH_(3))_(3)CD`
`(CH_(3))_(3)COD`
`(CD_(3))_(3)CD`
`(CD_(3))_(3)COD`

ANSWER :A
Discussion
10.

(CH_3)_3CCloverset(NaCl)rarrAoverset(dil.H_2SO_4)rarrBCompound B is

Answer»

`(CH)_3COOOH`
`(CH_3)_3COH`
`(CH_3)_3COC(CH_3)_3`
All the three

Solution : `CN^(-)` is a strong base and since the substrate is a tert-halide, it mainly UNDERGOES elimination reaction forming ALKENE (A). In presence of dil. `H_2SO_4` alkenes undergo hydration in Markovnikov.s way.
`CH_3-OVERSET(CH_3)overset(|)underset(CH_3)underset(|)C-Cl-overset(CN^(-))underset((-HCl))rarrCH_3-overset(CH_2)overset(||)underset(A)underset(CH_3)underset(|)Coverset(dil.H_2SO_4)underset(hydration)rarrCH_3-overset(CH_3)overset(|)underset(B)underset(CH_3)underset(|)C-OH`
Discussion
11.

(CH_(3))_(3)CMgBr on reaction with D_(2)O produces

Answer»

`(CH_(3))_(3)CD`<BR>`(CH_(3))_(3)COD`
`(CD_(3))_(3)CD`
`(CD_(3))_(3)OD`

SOLUTION :`(CH_(3))_(3)CMgBr+D-OD to (CH_(3))_(3)CD+Mg(OD)Br`
Discussion
12.

(CH_3)_3CMgCl on reaction with D_2O gives :

Answer»

`(CH_3)_3CD`
`(CH_3)_3OD`
`(CD_3)_3CD`
`(CD_3)_3OD`

ANSWER :A
Discussion
13.

(CH_3)_3"CCl" (I) & (CD_2)_3C Cl(II)Both undergo reaction by SN^1 mechanism. Which statements belowis correct

Answer»

Both have same REACTIVITY
I undergoes faster than II
I UNDERGO slower than II
Reactivity cannot be PREDICTED

Answer :B
Discussion
14.

(CH_(3))_(3)C-overset(O)overset("||")C-CH_(2)-overset(O)overset("||")C-O-C_(2)H_(5)overset(C_(2)H_(5)oversetΘO(1"Mole"))underset(PhCH_(2)Br)rarroverset(H^(oplus)"//"H_(2)O)underset(Delta)rarr" Final product":

Answer»

`(CH_(3))_(3)C-overset(O)overset("||")C-CH_(2)-overset(O)overset("||")C-OH`
`(CH_(3))_(3)C-overset(O)overset("||")C-CH_(3)`
`(CH_(3))_(3)C-overset(O)overset("||")C-underset(CH_(2)Ph)underset(|)CH-overset(O)overset("||")C-OC_(2)H_(5)`
`(CH_(3))_(3)C-overset(O)overset("||")C-CH_(2)-CH_(2)-Ph`

Answer :D
Discussion
15.

(CH_(3))_(3)C-OH on treatment with NaCl in aqueous medium gives

Answer»

No REACTION
`(CH_(3))_(3)C^(-)NA^(+)`
`(CH_(3))_(3)C^(-)CL^(-)`
Isobutylene

Answer :A
Discussion
16.

(CH_(3))_(3)C-MgClon reaction with D_(2)Oproduces:

Answer»

`(CH_(3))_(3)CD`
`(CH_(3))_(3)OD`
`(CD_(3))_(3)CD`
`(CD_(3))_(3)OD`

ANSWER :A
Discussion
17.

(CH_(3))_(3)C-CHO does not undergo aldol condensation. Comment.

Answer»

SOLUTION :This is DUE to the ABSENCE of `ALPHA-` hydrogen in the COMPOUND.
Discussion
18.

(CH_(3))_(3)C C(CH_(3))_(3) overset(Na,"ether")rarr R'-X overset(Mg)rarr D overset(H_(2)O)rarr E. What is E?

Answer»


ANSWER :ISOBUTANE
Discussion
19.

(CH_(3))_(3)C-Br on treatement with mosit silver oxide give

Answer»

`(CH_(3))_(3)C-OH`
`(CH_(3))_(2)CH-CH_(2)-OH`
`(CH_(3))_(3)C-Ag`
`(CH_(3))_(3)CH-CH_(2)OH`

SOLUTION :`(CH_(3))_(3)C-Br+AgOH OVERSET(Delta) to (CH_(3))_(2)C-OH+AgBr`
Discussion
20.

(CH_(3))_(3) SiCl is used during polymerizationof organosilicons because

Answer»

The chain length of organosilicon polymers can be controlled by adding`(CH_(3))_(3)SiCl`
`(CH_(3))_(3)SiCl`improves the QUALITY and YIELD of the POLYMER
`(CH_(3))_(3)SiCl` does not block the end terminal of silicone polymer
`(CH_(3))_(3)SiCl` acts as a catalyst during polymerisation

SOLUTION :The chain length of the polymer can be controlled by adding `(CH_(3))_(3)SiCl` which BLOCKS the ends.
Discussion
21.

(CH_3)_3 C -NH_2 is a _____ amine

Answer»

SOLUTION :`1^@` ALCOHOL
Discussion
22.

(CH_3)_3 C -NH_2 is a _____ amine.

Answer»

SOLUTION :`1^@` ALCOHOL
Discussion
23.

(CH_(3))_(3)-C-CH(OH)CH_(3) overset("Conc." H_(2_)SO_(4)) to X (major product)

Answer»

`(CH_(3))_(3)"C C"H = CH_(2)`
`(CH_(3))_(2)C =C(CH_(3))_(2)`
`CH_(2)=C(CH_(3))CH_(2).CH_(2).CH_(3)`
`CH_(2)=C(CH_(3)).CH_(2).CH_(2).CH_(3)`

Answer :B
Discussion
24.

(CH_3)_3- C- CH(OH) CH_3 overset(Conc. H_2SO_4)to X (major product)

Answer»

`(CH_3)_3 C CH = CH_2`
`(CH_3)_2 C = C (CH_3)_2`
`CH_2= C (CH_3)CH_2-CH_2 -CH_3`
`CH_2 = C (CH_3) - CH_2 - CH_2 - CH_3`

SOLUTION :
Discussion
25.

(CH_(3))_(2)underset(NH_(2))underset(|)C.CH_(2).CO.CH_(3)

Answer»

Diacetone
Acetoneamine
Diacetoneamine
AMINOACETONE

SOLUTION :
Discussion
26.

(CH_(3))_(2)CHOH overset("Mild")underset("oxidation[O]")rarr (X) overset((i)CH_(3)Mgl)underset((ii)"Hydrolysis")rarr (Y) In the above sequence of reaction, (Y) is:

Answer»

ISOBUTYL alcohol
n - BUTYL alcohol
Tertiary butyl alcohol
Isobutylene

Answer :C
Discussion
27.

(CH_(3))_(2)CHNH_(2) is reactedwithexcess aceticanhydride , thecompoundfomred is

Answer»

`(CH_(3))_(2)CHNCOCH_(3)`
`(CH_(3))_(2)CHN(COCH_(3))_(2)`
`(CH_(3))_(2)CHOH`
`(CH_(3))_(2)CHN(COOCH_(2))`

ANSWER :B
Discussion
28.

(CH_(3))_(2)CHNH_(2) is

Answer»

`1^(0)` AMINES
`2^(0)` amines
`3^(0)` amine
all of these

ANSWER :A
Discussion
29.

(CH_3)_2CHCloverset(NaF)underset(H_2O)rarr(Y) X+Yoverset(H^+)rarr(Z) Compound (X) and (Z) are respectively

Answer»




SOLUTION :
Discussion
30.

(CH_3)_2CH-oversetoverset(OH)|CH-CH_3 overset(Al_2O_3)to X Give the IUPAC name of major product formed in the reaction

Answer»

3-methyl 2-butene
isobutylene
2-methyl 2-butene
2-methyl 1-propene

Answer :C
Discussion
31.

(CH_(3))_(2)CH-Ioverset(Na//A"ether")toA The compound A is

Answer»

`(CH_(3))_(2)CHCH_(2)CH_(2)CH_(3)`
`CH_(3)CH_(2)CH_(2)CH_(2)CH_(2)CH_(3)`
`(CH_(3))_(2)CHCH(CH_(3))_(2)`
NONE of these

Solution :`2(CH_(3)) CHl+2Na overset("ETHER") to (CH_(3))_(2)CH-CH(CH_(3))_(2)2Nal`
Discussion
32.

(CH_(3))_(2)C=CHCOCH_(3) can be oxidised to (CH_(3))_(2) C=CHCOOH by

Answer»

chromic acid
NaOl, followed by acidification
Cu at 573 K
`KMnO_(4)+H_(2)SO_(4)`

ANSWER :B
Discussion
33.

(CH_(3))_(2)C=CHCOCH_(3) can be oxidised to (CH_(3))_(2)C=CHCOOH by

Answer»

Chromic acid
NaOl
Cu at `300^(@)C`
`KMnO_(4)`

ANSWER :B
Discussion
34.

(CH_(3))_(2)C=CHCOCH_(3) can be oxidised to (CH_(3))_(2)C=CHCOOH by:

Answer»

Chromic ACID
`NaOI`
CU at `300^(@)C`
`KMnO_(4)`

Solution :Only NaOI (iodoform reaction) will oxidise `COCH_(3)` to `CHI_(3)` while all other reagents will bring about oxidation both at the double bond as well as the KETO group.
Discussion
35.

(CH_3)_2C=CHCOCH_3 and be oxidised to (CH_3)_2=CHCOOH by:

Answer»

`CU at 300^oC`
`KMnO_4`
CHROMIC acid
NaOl

Answer :D
Discussion
36.

(CH_(3))_(2)C=C(CH_(3))_(2) underset("KOH(heat)")overset("X")rarr (CH_(3))_(2)C=O+O=C(CH_(3))_(2) in the above reaction 'X' is

Answer»

`HNO_(3)`
`O_(3)`
`O_(2)`
`KMnO_(4)`

ANSWER :D
Discussion
37.

(CH_3)_2C-underset(CH_3)underset|CH underset(H_2)overset"Catalyst"toOptical isomers

Answer»

2
4
Zero
3

Solution :`(CH_3)_2-C=undersetunderset(CH_3)(|)CHunderset"HYDROGENATION"OVERSET"CATALYTIC"to (CH_3)_2-CH-undersetunderset(CH_3)(|)CH_2`
Discussion
38.

(CH_(3))_(2)C-NH_(2) and (CH_(3))_(3) N are pair of opticalisomers2 identical 3) chain isomers(4) function isomers (5) notidential .

Answer»

1,4
only 4
only 5
all of these

SOLUTION :There arenot identicalbecausethey havedifferentmolecularfromula .
Discussion
39.

(CH)_(3))_(2)C- MgBr reaction with H_(2)O produced

Answer»

`(CH_(3))_(2) CH`
`(CH_(3))_(3)CH`
`(CH_(3))_(3)COH`
`(CH_(3))_(3)OH`

ANSWER :A
Discussion
40.

(CH_3)_2-undersetunderset(OH)|C-CH_2-C(CH_3)_3 underset"dichromate"overset"acidic " tothe main product is

Answer»

`CH_3-oversetoverset(CH_3)|C=CH-undersetunderset(CH_3)|oversetoverset(CH_3)|C-CH_3`
`CH_2=overset(CH_3)overset(|)C-CH_2-undersetunderset(CH_3)|oversetoverset(CH_3)|C-CH_3`
`CH_3-oversetoverset(CH_3)|C=CH-oversetoverset(CH_3)|C=CH_3`
`CH_2=oversetoverset(CH_3)|C-CH_2-oversetoverset(CH_3)|C=CH_2`

SOLUTION :It is `3^@` alcohol on dehydration GIVES alkene ACCORDING to SAYTZEFF rule
Discussion
41.

(CH_3)_2 CHOH overset("mild oxidation")(to) X underset(H_2O)overset((i)CH_3MgBr)(to) YHere Y is

Answer»

ISO BUTYL ALCOHOL
Iso butylene
sec.Butyl alcohol
TERT. Butyl alcohol

Answer :D
Discussion
42.

(CH_3)_2-CH-NO when boiled with HCl"/"H_2O gives compound 'X'. Identify 'X'.

Answer»

`CH_3COOH`
`(CH_3)_2C=O`
`CH_3CHO`
`CH_3NO_2`

ANSWER :B
Discussion
43.

(CH_(3))_(2)C = CHCOCH_(3) can be oxidised to (CH_(3))_(2) C = CH - COONaby

Answer»

`NaOH + KOH`
`NaOH`
`NAOI`
`KMnO_(4)//H^(+)`

ANSWER :C
Discussion
44.

CH_(3)-Xnu^(-) to CH_(3)-Nu+X^(-) The decreasing order of the rate of above reaction with X is 1 Cl "" 2 F "" 3 Br ""4 I

Answer»

`1 GT 2 gt 3 gt 4`
`4 gt 3 gt 2 gt 1`
`4 gt 3 gt 1 gt 2`
`1 gt 4 gt 2 gt 3`

Answer :C
Discussion
45.

CH_3-undersetunderset(O)(||)C-undersetunderset(O)(||)C-CH_3underset(("excess"))overset(PhMgBr)to overset(H_2O)to"No of product" ( X) overset("Fractional distillation")tono offractions (Y) X and Y are respectively

Answer»

3,2
3,3
4,2
4,3

Solution :
Discussion
46.

CH_3-undersetunderset(O)(||)C-(CH_2)_4-undersetunderset(O)(||)C-CH_3 " " underset(H^+)overset(Ooverset(Theta)H//Delta)toAoverset(Ph-MgBr)toBunderset(Conc.HCl)overset(Zn-Hg)toC The product 'C' is:

Answer»




SOLUTION :
Discussion
47.

CH_3 - undersetoverset(||)(O)(C ) - CH_3 overset(conc. HNO_3)(to) A + B . In this reaction A and B are ….

Answer»

`CH_3COOH + HCOOH`
`CH_3COOH + CO_2`
`CH_3 - undersetoverset(|)(OH)(C )H - CH_3 + H_2O`
`HCOOH + CO_2`

SOLUTION :`CH_3COOH + HCOOH`
Discussion
48.

CH_(3)-underset(O)underset(||)(C)-CH_(3)underset(Na_(2)CO_(3))overset(I_(2))rarr(A)overset("Ag powder")rarr(B)underset(Hg^(++))overset(H_(2)SO_(4))rarr(C) Product A,B & C are -

Answer»

Iodoform, Acetylene & Acetaldehyde
Tri. iodomethane, ETHYNE & Acetone
Iodoform, ETHENE & ETHYLENE glycol
Ethene, iodoform & Ethylhydrogen sulphate

Answer :A
Discussion
49.

CH_(3)- underset(OH)underset(|)CH- CH_(3) underset(Na_2Cr_2O_7//H_2SO_4)overset([O])to X, What is X?

Answer»

Propanone
Propanal
Propanoic acid
None of these

Solution :`UNDERSET("Propan-2-ol")(CH_(3)- underset(OH)underset(|)CH- CH_(3)) underset(Na_2Cr_2O_7//H_2SO_4)overset([O])to underset("Propanone")(CH_(3)-underset(O)underset(||)C-CH_(3))`
Discussion
50.

CH_(3)-underset(OCH_(3))underset(|)(CH)-overset(O)overset(||)(C)-underset(CH_(3))underset(|)(CH)-OCH_(2)-CH_(3) The IUPAC name of this compound is

Answer»

2-ethoxy-4-methoxy-pentan-3-one
2-methoxy-4-ethoxy-pentan-3-one
2-ethoxy-3-methoxy-pentan-3-one
none of the above.

ANSWER :a
Discussion