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)-CH_(2)-CH_(2)-underset(OH)underset(|)(CH)-CH_(3) underset(-H_(2)O)overset(H^(o+))rarr[F] overset(Br_(2)//C Cl_(4))rarrC_(5)H_(10)Br_(2)(G) How many structures of (G) is possible ? (including all stereoisomers)

Answer»

2
6
3
5

Answer :B
Discussion
2.

CH_(3)-CH_(2)-CH_(2)-underset(OH)underset(|)underset(C=O)underset(|)underset(CH_(2))underset(|)(CH)-COOH Number of carbon is selected principal carbon chain for IUPAC nomenclature will be

Answer»

3
4
5
6

Solution :
CARBONS CONTAINING CHAIN because it INCLUDE both the carbons of -COOH.
Discussion
3.

CH_(3) CH_(2) CH_(2) underset( hv) overset( Cl_(2))tounderset( ("Monochlorinationproducts "))((A) +(B) ) theappoximateratioof percentage yieldsof ( A) and (B)formedin theabovereactionis :

Answer»

`60:40`
`50:50`
`45:55`
`28:72`

ANSWER :D
Discussion
4.

CH_3-CH_2-CH_2-CO-CH_2-CH(CH_3)_2Catalytic hydrogenation of above compound m the presence of nickel catalyst gives

Answer»

an OPTICALLY INACTIVE COMPOUND
an optically active compound
compound with plane of symmetry
an TERTIARY alcohol

ANSWER :B
Discussion
5.

CH_3 CH_2 CH_2 OH overset( x) to CH_3 CH= CH_2 ,The reagent 'X' is

Answer»

` 5% H_2SO_4 at 50 C `
` 75 % H_2SO_4 at 100 C `
` 95% H_2SO_4 at 170C `
` A1_2 O _3 , 170C `

ANSWER :C
Discussion
6.

CH_(3)-CH_(2)-CH_(2)-ClandCH_(3)-CHCl-CH_(3) are

Answer»

CHAIN isomers
position isomers
optical isomers
metamers

Answer :B
Discussion
7.

CH_3-CH_2-CH_2-Cl underset(KOH)overset(alc)(rarr) B overset(HBr)C underset("ether")overset(Na)(rarr) D. In the above sequence the product D is

Answer»

Propane
2-3 DIMETHYL BUTANE
Hexane
Allyl BROMIDE

Answer :B
Discussion
8.

CH_3-CH_2-CH_2-CH_3underset"HBr"overset(AlCl_3)to product. Product in above reaction is

Answer»

`CH_3-undersetunderset(BR)(|)CH-CH_2-CH_3`
`CH_3-undersetunderset(CH_3)|CH-CH_3`
`undersetunderset(Br)|CH_2-CH_2-undersetunderset(CH_3)|CH_2`
All of these

Answer :B
Discussion
9.

CH_3 CH_2 CH_2 CH_3 overset(Cl_2)underset(hv)(to) underset("(monochlorination products)") (A + B) The approximate ratio of percentage yields of A and B formed in the above reaction is

Answer»

`50 : 50`
`72 : 28`
`45 : 55`
`60 : 40`

Solution :n-Butane has two types of H-atoms (six `1^(@)` and FOUR `2^(@)`) , therefore , it gives two monochloro-derivates , i.e., 2-chlorobutane (A) and 1-chloro-butane (B) . Their relative percentage YIELDS are
`("AMOUNT of A")/("Amount of B") = (4)/(6) xx (3.8)/(1.0) = (15.2)/(6.0) = (72% )/(28%)`
Discussion
10.

CH_(3)-CH_(2)-CH_(2)-CH_(2)CHOandCH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CHO exhibit _______ isomerism.

Answer»

positional
geometrical
functional
chain

Answer :D
Discussion
11.

CH_(3) - CH_(2) - C equiv CH underset(H_(2)SO_(4))overset("HgSO"_(4))(rarr) A, the compound A is

Answer»

`CH_(3) - CH_(2) - OVERSET(O)overset(||)(C ) - CH_(3)`
`CH_(3) - CH_(2) - CH_(2) - `CHO
`CH_(3) - CH_(2) -CH_(2) - `COOH
`CH_(3) CH_(2) CH_(2) CH_(2) `OH

Solution :Oxymercuration of alkynes is HYDROLYSIS of alkynes in accordance with electrophilic addition mechanism. The RESULTING ENOL in this case tautomerizes to form 2- butanone.
Discussion
12.

CH_3 CH_2CH= CH-CH_2 OH overset( PC C ) to A, Here 'A' :

Answer»

` CH_3 CH_2 COOH +HOOC -COOH`
` CH_3 CH_2 CH= CH- COOH`
` CH_3 CH_2 CH(OH) CH(OH) CHO`
` CH_3 CH_2 CH= CHCHO `

ANSWER :D
Discussion
13.

CH_3-CH_2-C-=CHunderset(H_2SO_4)overset(HgSO_4)rarrA

Answer»

`CH_3CH_2COCH_3`
`CH_3CH_2CH_2CHO`
`CH_3CH_2CHO`
`CH_3COCH_3`

ANSWER :A
Discussion
14.

CH_(3)-CH_(2)-C-=CH overset(40%H_2SO_(4))underset(1%HgSO_(4))toA overset ("isomerism")to CH_(3)- CH_(2)-underset(O)underset(||)C-CH_(3). Structure of ‘A’ and type of isomerism in the above reaction are respectively.

Answer»

But-1-en-2-ol,metamerism
But-1-cn-ol,TAUTOMERISM
But-2-en-2-ol,geometrical
But-1-en-2-ol,tautomerism.

ANSWER :D
Discussion
15.

CH_(3)-CH_(2)-Broverset("Alc. "KCN)toCH_(3)CH_(2)CN overset(HOH)toX I this reaction, product X is

Answer»

ACETIC acid
Propionic acid
Butyic acid
Formic acid

Answer :B
Discussion
16.

CH_(3)(--CH_(2)--)_(10)CHO underset( "ii)" H^(+)//H_(2)O)overset("i)" NaBH_(4))to 'X' overset(H_(2)SO_(4))to 'Y' overset(NaOH)to 'Z' The compound 'Z' in the abovereaction is used as an anionic detergent in soap industry. Givethe hydrophilic and (II) hydrophobic parts of the compound 'Z' .

Answer»

`{:("(I)","(II)"),(CH_(3)(--CH_(2)--)_(10)CH_(2)OSO_(3)^(-),""NA^(+)):}`
`{:("(I)","(II)"),(CH_(3)(--CH_(2)--)_(10)CH_(2)-,-OSO_(3)^(-)Na^(+)):}`
`{:("(I)","(II)"),(Na^(+),CH_(3)(--CH_(2)--)_(10)CH_(2)OSO_(3)^(-)):}`
`{:("(I)","(II)"),(-OSO_(3)^(-)Na^(+),CH_(3)(--CH_(2)--)_(10)CH_(2)-):}`

ANSWER :D
Discussion
17.

CH_(3)-CH_(2)-Br overset("Alco. KOH")underset(Delta) to B overset(HBr) to C overset(Na//"ether") to D The compound D is:

Answer»

ETHANE
PROPANE
n-butane
n-pentane

ANSWER :A::B::C
Discussion
18.

CH_(3)-CH_(2)-Br on treatment with LiAlH_(4) gives ethane gas while (CH_(3))C-Br on the same treatment gives H_(2) as because

Answer»

The FORMER is `S_(N^(2))` and LATER is E2 reaction
The former is E2 an later is `S_(N^(2))` reaction
The former is `S_(N^(1))` and later is E2 reaction
The former is E2 and later is `S_(N^(1))` reaction

Solution :
Discussion
19.

CH_(3) - CH= CH - CHOis oxidised toCH_(3) - CH = CH - COOH using oxidising agent

Answer»

alkaline `KMnO_(4)`
`K_(2)Cr_(2)O_(7) + CONC. H_(2) SO_(4)`
dil `NHO_(3)`
AMMONIACAL `AgNO_(3)`

Answer :D
Discussion
20.

CH_3-C -=N overset(H_2// Ni)to P, P is :

Answer»

`C_2 H_5 NC`
`C_2 H_5 NH_2`
`CH_3 NHCH_3`
`CH_3 NH_2`

ANSWER :B
Discussion
21.

CH_3 - C-= CMg Br can be prepared by the reaction of

Answer»

`CH_3- C-= C- BR` with `MgBr_2`
`CH_3- C -= CH` with `MgBr_2`
`CH_3 - C -= CH` with KBr and Mg metal
`CH_3 - C -= CH` with `CH_3 Mg Br`.

SOLUTION :Acetylynic HYDROGEN is acidic and is REPLACEABLE .GRIGNARD reagent (RMgBr)is ionised as `overset(-)(R) overset(+)(M)gBr` (due to appreciated electronegativity difference of carbon and magnesium).
Discussion
22.

CH_(3)-C-=CHunderset(H_(2)SO_(4))overset(HgSO_(4))rarr(A), CH_(3)-C-=C-CH_(3)underset(H_(2)SO_(4))overset(HgSO_(4))rarr(B) Relation between (A) and (B)

Answer»

POSITION ISOMER
FUNCTIONAL isomers
Homologous
Metamers

Answer :C
Discussion
23.

CH_3-C-=CH underset(Zn//H_2O_2) overset(O_3)to Product . Product in above reaction is

Answer»

`CH_3COOH`
`HCOOH`
Both (a) and (B)
`CH_3CHO+HCHO`

ANSWER :C
Discussion
24.

CH_(3)-C-=CH underset(dil.H_(2)SO_(4))overset(Hg^(2+))rarr x (Carbonyl compounds). The number of sigma, pibonds and lonepairs of electrons in 'x' are respectively

Answer»

9,2,2
6,1,2
9,1,2
9,2,3

Answer :C
Discussion
25.

CH_(3)-C-=CH underset(1%HgSO_(4))overset(40%H_(2)SO_(4))toA overset("Isomerisation")to CH_(3)-underset(O)underset(||)(C)-CH_(3) Structure of 'A' and type of isomerism in the above reaction are respectively.

Answer»

Prop-1-en-2-ol, metamerism
Prop-1-en-1-ol, tautomerism
Prop-2-en-2-ol, geometrical isomerism
Prop-1-en-2-ol, tautomerism

Solution :`underset("PROPYNE")(CH_(3)-C-=CH) underset(1%HgSO_(4))OVERSET(40%H_(2)SO_(4))to underset("Prop-1-en-2-ol (A)")(CH_(3)-overset(OH)overset(|)(C)=CH_(2)) overset("TAUTOMERIZATION")to underset("Acetone")(CH_(3)-overset(O)overset(||)(C)-CH_(3))`.
Prop-1-en-2-ol (A) and acetone are tautomers. THUS, option (d) is correct.
Discussion
26.

CH_3 - CH = CH reacts with HCl to give:

Answer»

2,2-dichloropropane
1,1-dichloropropane
1,2-dichloropropane
1-chloropropene

ANSWER :A
Discussion
27.

CH_3-C-= CH + Br_2 overset (Ccl_4)(rarr)(A)The product (A) is

Answer»

(## AAK_MCP_27_NEET_CHE_E27_043_A001 .PNG" WIDTH="30%">
(## AAK_MCP_27_NEET_CHE_E27_043_A002 .png" width="30%">
(## AAK_MCP_27_NEET_CHE_E27_043_A003 .png" width="30%">
`CH_3-CH_2-CHBr_2`

ANSWER :B
Discussion
28.

CH_(3)-C-=CH overset(40%H_(2)SO_(4))underset(1%HgSO_(4))to A overset("Isomerisation")to CH_(3)-underset(O)underset("||")C-CH_(3) Structure of 'A' and type of isomerism in the above reaction are respectively

Answer»

prop-1-en-2-ol, metamerism
prop-1-en-1-ol,tautomerism
prop-2-en-2-ol, geometrical isomerism
prop-1-en-2-ol, tautomerism.

SOLUTION :`underset(""underset("ACETONE")overset(""darroverset(" ")underset(" ")"Tautomerisation")overset(O)overset("||")(CH_(3)-C-CH_(3)))(CH_(3)-C-=CH overset(40%H_(2)SO_(4))underset(1%HgSO_(4))to underset("Prop-1-en-2-ol(A)")(CH_(3)-overset(OH)overset(|)C=CH_(2)))`
Discussion
29.

CH_(3)-C-=C-CH_(3)underset(Pd-BaSO_(4))overset(H_(2))rarr(A)underset(Ni)overset(D_(2))rarr(B) Product (B) of above reaction is

Answer»




ANSWER :A
Discussion
30.

CH_3-Br underset("ether")overset(Mg)(rarr) X overset((CH_3)_3C-OH)(rarr)A. Product A is

Answer»

` CH_4 `
` (CH_3)_3CH`
` (cH_3)_3C-O-Br`
`(CH_3)_3C-O-CH_3`

ANSWER :A
Discussion
31.

CH_(3)-Br+Nu^(-)toCH_(3)-Nu+Br^(-) ltBrgt 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»

DgtCgtAgtB
DgtCgtBgtA
AgtBgtCgtD
BgtDgtCgtA

Solution :PHENOXIDE ion is less resonance STABILIZED than `AcO^(-)` ion, therefore, nucleophilicity DECREASES in the order:
`CH_(3)O^(-)(D) gt HO^(-)(C) gt PhO^(-)(A)AcO^(-)(B)` thus, option (a) is correct.
Discussion
32.

CH_(3)Br + AgF rarr CH_(3)F + AgBr. Name the reaction.

Answer»

SOLUTION :Swart.s REACTION.
Discussion
33.

(CH_3)_3COCH_3 overset(+HI)(to) (CH_3)_3 Cl + CH_3OH It follows which mechanism ?

Answer»

`S_N1`
` S_N2`
` E_1`
`E_2`

ANSWER :A
Discussion
34.

(CH_3) _2 NH overset( KMnO_4) to A, (CH_3)_2 N overset( H_2SO_4) to BHere A and B are

Answer»

TETRAMETHYL hydrazine, DIMETHYL hydroxyl AMINE
Dimethyl hydroxyl amine , tetramethyl hydrazine
Tetramethylhydrazine ,tetramethyl hydrazine
Dimethyldroxyl amine ,dimethyl hydroxyl amine

Answer :A
Discussion
35.

(CH_3)_3C - OH overset(H_2SO_4 Delta)(to) (CH_3)_2 C = CH_2 ,This reaction takes place through

Answer»

`S_N 1` MECHANISM
`S_N2 ` mechanism
Dehydration
DEHYDROGENATION

ANSWER :C
Discussion
36.

(CH_(3))_(2)CO underset((HCl))overset(NaCN)rarr A underset(Delta)overset(H_(3)O^(+))rarr B. In the above sequence A and B are

Answer»

` (CH_3) _2 C(OH) CN, (CH_3) _2 C (OH) COOH`
` (CH_3) _2 C (OH) CN, (CH_3) _2 C (OH)_2`
` CH_3CHOHCN, (CH_3) _2 CHCOOH`
` (CH_3) _2 C(OH) CN, (CH_3) _2C= O`

Answer :A
Discussion
37.

{:(CH_2OH),(|),(C=O),(|),((CH_2 OH)_3),(|),(CH_2OH):}Totalnumberof possibleconfiguationalstereoisomers

Answer»

2
4
8
16

Answer :C
Discussion
38.

CH_(2)OHCH_(2)CH_(2)COCH_(3)overset("Reagent")rarrCH_(2)OHCH_(2)CH_(2)CH_(2)CH_(3) Suitable reagentfor above reaction is :-

Answer»

<P>ZN-`Hg//HCl`
`NH_(2)NH_(2)//C_(2)H_(5)ONA`
Red P + HI
All

Answer :B
Discussion
39.

CH_(2)O + CH_(3)CHO underset(Delta)overset(OH^(-))(rarr) (A).(A) reacts with cyclohyexanone in basic medium to give a final product. Structure of the final product is :

Answer»




Solution :Both aldehydes will go for crossed aldol CONDENSATION to GIVE (A) which UNDERGOES 1,4 addition of carbanion of cyclohexanone in presence of base to giveas the FINAL product.
Discussion
40.

CH_2N_2 and 2-propanol gives

Answer»

`(CH_3)_2CHOCH_3`
`(CH_3)_2CHCOOH`
`(CH_3)_2NCH_3`
`(CH_3)_2CH-NH-CH_3`

ANSWER :A
Discussion
41.

CH_(2)COCl is usedto detect the numberof amino groupin the organci compouds . Whena compound of molecular mass 180is acetylatedgives a compoundof molecularmass 390. The numberof amion groupsin thecompound is :

Answer»

1
2
5
4

Answer :C
Discussion
42.

CH_(2)Cl_(2) on heating withNaOH solution gives :

Answer»

`CH_(3)OH`
HCOONa
HCHO

Answer :A::B::C
Discussion
43.

CH_(2)=CHunderset(OH)underset(|)CHCH_(2)CH_(2)OHunderset(/_\)overset(MnO_(2))rarr A A is :

Answer»

`CH_(2)=CHunderset(O)underset(||)C CH_(2)CH_(2)OH`
`CH_(2)=CHunderset(OH)underset(|)CHCH_(2)CHO`
`CH_(2)=CHunderset(O)underset(||)CH_(2)CHO`
`CH_(2)=CHunderset(O)underset(||)C CH_(2)OVERSET(O)overset(||)COH`

Solution :N//A
Discussion
44.

CH_2ClCH_2OH is stronger acid than CH_3CH_2OH because :

Answer»

`-I` EFFECT of CI DISPERSES -ve charge on O atom to produce more stable ANION
`+I` effect of Cl INCREASES -ve charge on O atom to produce more stable anion
`-I` effectof Cl increases -ve charge on O atom of alcohol
None

Answer :B
Discussion
45.

CH_2=CHCl reacts with HCl to form:

Answer»

`CCl_4`
`CHCl_3`
`CH_2Cl_2`
`CH_3CL`

ANSWER :B
Discussion
46.

CH_2=CHCl reacts with HCl to form

Answer»

`CH_2Cl-CH_2Cl`
`CH_3-CHCl_2`
`CH_2=CHCl.HCl`
None of these

Solution :
According to Markownikoff's rule H atom of the REAGENT GOES to that CARBON atom which is more HYDROGENATED.
Discussion
47.

CH_2=CHCH_2=CH_2overset(NBS)rarrA A is

Answer»

`H_2C=CH-underset(Br)underset(|)(CHCH)=CH_2`
`CH_2=CHCH_2CH=CHBr`
`CH_2=CHCH_2CH=CHBr`
`H_2C=CHCH_2-underset(Br)underset(|)(C)=CH`

SOLUTION :`{:(CH_2=(CHCH_2CH=CH_2)),(""darrNBS),(CH_2=CHCHCH=CH_2),(""|),(""Br):}`
Discussion
48.

CH_2=CH_2underset(KOH//H_2O)overset(KMnO_4)to X. Product 'X' in above reaction is

Answer»

ETHYLENE glycol
Glucose
Ethanol
All of these

Answer :A
Discussion
49.

CH_2=CH_2overset(Br_2//H_2O)to A, In the above reaction the compound A is

Answer»

ETHYLENE bromohydrin
1,2-dibromo ethane
Ethanol
None of these

Solution :`CH_2=CH_2overset(Br_2,H_2O)tounderset"Ethylene bromohydr in"(undersetunderset"Br""|"(CH_2)-underset"OH"underset|CH_2)`
HENCE COMPOUND A is Ethylene bromohydrin
Discussion
50.

CH_(2)=CH_(2)+H_(2)O overset("cold")underset("alk KMnO_(4)) to underset(OH)overset(CH_(2))| The above reaction is ___________

Answer»

LUCAS test
SAPONIFICATION
VICTOR MEYER's test
HYDROXYLATION

Answer :D
Discussion