Explore topic-wise InterviewSolutions in Current Affairs.

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1.

CH_(3)COOH overset(LiAlH_(4))rarr A A + CH_(3)COOH overset(H_(3)O^(+))rarr B + H_(2)O In the above reaction 'A' and B respectively are

Answer»

`CH_(3)COOC_(2)H_(5), C_(2)H_(5)OH`
`CH_(3)CHO, C_(2)H_(5)OH`
`C_(2)H_(5)OH, CH_(3)CHO`
`C_(2)H_(5)OH, CH_(3)COOC_(2) H_(5)`

SOLUTION :`beta-` KETOACIDS on HEATING readily undergo decarboxylation
Discussion
2.

CH_(3)COOH is neutralized by NaOH. Conductometric titration curve will be of the type:

Answer»




ANSWER :A
Discussion
3.

CH_(3)COCl on reaction with hot alcoholic potash gives

Answer»

`CH_(3)COOH`
`CH_(2) = C = O`
`CH_(3)COO^(-)K^(+)`
`(CH_(3)CO)_(2)O`

Solution :`CH_(3)COCl` on reaction with hot alcoholic potash undergoes loss of `HCl` to form KETENE `CH_(2)= C = O`
`CH_(3) - COCl + KOH (alc.) overset(Delta)rarr underset("Ketene")(CH_(2) = C = O) + KCl + H_(2)O`
Discussion
4.

CH_(3)CO_(2)C_(2)H_(5) on reaction with sodium ethoxide in ethanol gives X, which on heating in the presence of acid gives Y. Compound Y is

Answer»

`CH_(3)COCH_(2)COOH`
`CH_(3)COCH_(3)`

SOLUTION :`CH_(3) COOC_(2)H_(5) overset(C_(2)H_(5)ONA) rarr CH_(3)COCH_(2)COOC_(2)H_(5) overset(H_(2)O // H^(+))rarr CH_(3)COCH_(2)COOH`
Discussion
5.

CH_(3)COCH_(3) and CH_(2) = COH - CH_(3) represent

Answer»

Metamers
Position isomers
Keto-enol tautomers
Functional isomers

Answer :C
Discussion
6.

CH_(3)CN overset(H_(2)O)rarr X overset("diazomethane")rarr Y X and Y are

Answer»

Acetamide, N-methyl acetamide
Acetic acid, ethyl ethanoate
Acetic acid, ethyl ethanoate
Acetamide, Acetone

Solution :`UNDERSET("Methyl CYANIDE")(CH_(3)CN OVERSET(H_(2)O)rarr) underset((X))(CH_(3)COOH) overset(CH_(2)N_(2))rarr underset("Methyl ACETATE")(CH_(3)COOCH_(3))`
Discussion
7.

CH_(3)Cl underset("Ether")overseet(Mg)rarr X overset(CH_(3)COCl)rarr Y The end product Y is

Answer»

Acetone
Ethanol
Tertiary BUTYL alcohol
Isopropyl alcohol

Solution :`CH_(3)Cl UNDERSET("ETHER")OVERSET(Mg) rarr CH_(3)MgCl overset(CH_(3)COCl)rarr underset("Tertiary butyl alcohol")((CH_(3))_(3) COH)`
Discussion
8.

CH_3Cl to CH_4 Above conversion can be achieved by :

Answer»

`Zn// H^(+)`
`LiAlH_4`
`Mg//H_2O` (ETHER ) then ` H_2O`
all of these

Solution :PREPERATION METHOD of methane
Discussion
9.

CH_(3)CHO (overset"O") to CH_(3)COOH .Identify the type of reaction?

Answer»

ADDITION reaction
Elimination reaction
Reduction reaction
Oxidation reaction

Answer :D
Discussion
10.

CH_(3)CHO+NH_(2)OHto CH_(3)CH=N-OHThe above reaction is carried out at

Answer»

`pH = 1`
`pH = 4.5`
`pH = 12`
`pH= 14`

SOLUTION :More Basic condititions: `OH^(-)` may ATTACK `CH_(3)CHO` More ACIDIC conditions : `H^(+)`may attack `NH_(2)-OH`
Discussion
11.

CH_(3)CHO can be prepared by (I) CH_(3)COCl+H_(2) overset(d//BaSO_(4))(rarr)CH_(3)CHO+HCl (II)CH_(2)=CH_(2)+O_(2) overset(Pd(II)//Cu(II))underset(I n water)(rarr) CH_(3)CHO which of the above is in accordance with NGT rules?

Answer»

only II
Only I
Both (a) and (B)
None of these

Solution :METHOD I used `Pd//BaSO_(4)` . `BaSO_(4)`CAUSES toxic problems in water. Hence, this synthesis is not in accordance with `NGT`RULES. Method `II` is desirable.
Discussion
12.

CH_(3)CHO+Ag_(2)OtoCH_(3)COOH+2Ag. In this reaction, which is reductant (reducing agent)?

Answer»

`CH_(3)COOH`
`Ag_(2)O`
Ag
`CH_(3)CHO`

Answer :D
Discussion
13.

CH_(3)CH=CH_(2)overset(BD_(3) //THF)underset(H_(2)O // OH)rarrX,

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SOLUTION :
Discussion
14.

(CH_(3))CHCH_(2)- and CH_(3)CH_(2)CH_(2) have same ….. and …… respectively.

Answer»

SOLUTION :ISOBUTYL, n-butyl.
Discussion
15.

CH_3CH_3 + HNO_3 overset(675K)to ?

Answer»

`CH_3CH_2,NO_2`
`CH_3CH_2 NO_2 + CH_3NO_2`
`2CH_3 NO_2`
`CH_2 = CH_2`

SOLUTION :Vapour phase NITRATION occurs with cleavage of C-C BONDS.
`CH_3 CH_3 underset(675K)OVERSET(HNO_3)to CH_3CH_2 NO_2 + CH_3NO_2`
Discussion
16.

CH_3CH_3+HNO_3 overset"675 K"to ?

Answer»

`CH_3CH_2NO_2`
`CH_3CH_2NO_2+CH_3NO_2`
`2CH_3NO_2`
`CH_2=CH_2`

Solution :Vapour PHASE nitration ALSO brings about cleavage of C-C bonds and hence a mixture of nitroalkanes (including some LOWER nitroalkanes ) is produced.
Discussion
17.

CH_(3)CH_(2)overset(+)(C)HCH_(3),""CH_(3)CH_(2)CH_(2)overset(+)(C)H_(2) CH_(3)-underset(CH_(3))underset(|)(CH)CH_(2)overset(+)(C)H_(2), ""CH_(3)-underset(CH_(3))underset(|)overset(+)(C)CH_(2)CH_(3)

Answer»

SOLUTION :`CH_(3)-UNDERSET(CH_(3))underset(|)overset(+)(C)CH_(2)CH_(3) gt CH_(3)CH_(2) overset(+)(C)HCH_(3) gt CH_(3)underset(CH_(3))underset(|)(CH)CH_(2)overset(+)(C)H gt CH_(3)CH_(2)CH_(2)overset(+)(C)H_(2)`
Discussion
18.

CH_(3)CH_(2)OH+SOCl_(2) overset("Pyridine")to CH_(3)CH_(2)Cl+SO_(2)+HCl. The above equation is known as

Answer»

Hunsdiccker reaction
Swarts reaction
Darzen's HALOGENATION
Fitting reaction

Solution :Darzen's halogenation
Discussion
19.

CH_(3)CH_(2)COOH underset("Red P")overset(Cl_(2))rarr A overset(Alc. KOH)rarr B what is B ?

Answer»

`CH_(3)CH_(2)COCl`
`CH_(3)CH_(2)CHO`
`CH_(2) = CHCOOH`
`ClCH_(2) CH_(2) COOH`

Solution :`CH_(3)CH_(2) COOH underset(HVZ "reaction")overset(Cl_(2). "RED P")rarr CH_(3) - underset(Cl)underset(|)(CH ) - COOH underset("Dehydrohalogenation")overset(alc. KOH)rarr CH_(2) = CH- COOH`
Discussion
20.

CH_(3)CH_(2)COOH underset("Red P")overset(Br_(2))rarr X overset(NH_(3)(alc.))rarr Y Y in the above reaction is

Answer»

LACTIC acid
Etylamine
Propylamine
ALANINE

Solution :`CH_(3)CH_(2) COOH underset(-HCL)overset(Br_(2), "Red P")rarr CH_(3) - overset(Br)overset(|)(CH) - COOH overset(NH_(3)(ALC.))rarr underset("Alanine")(CH_(3) -overset(NH_(2))overset(|)(CH) - COOH)`
Discussion
21.

CH_(3)CH_(2)Cl undergoes hydrolysis by

Answer»

`S_(N)1`
`S_(N)2`
both `S_(N)1 and S_(N)2`
`E_(1)`

SOLUTION :`S_(N)2`
Discussion
22.

CH_(3)CH_(2)CH_(2)overset(+)(C)H_(2) and CH_(3)-underset(CH_(3))underset(|)(CH)overset(+)(C)H_(2) is ………… and ……….. Is more stable.

Answer»

Solution :CARBOCATION `CH_(3)-underset(CH_(3))underset(|)(CH)-OVERSET(+)(C)H_(2)`
Discussion
23.

CH_(3)CH_(2)CH_(2)OH underset(170^(@)C)overset(conc." "H_(2)SO_(4))to A underset(500^(@)C)overset(Cl_(2))toB. A and B. are

Answer»

`A=CH_(3)CH_(2)CH_(3),B=CH_(3)CH_(2)CH_(2)CL`
`A=CH_(3)CH=CH_(2),B=CH_(2)ClCH=CH_(2)`
`A=CH_(2)=CH_(2),B=CH_(3)CH_(2)Cl`
`A=CH_(3)CH_(2)CH_(3),B=CH_(3)CH=CH_(2)`

Solution :`CH_(3)CH_(2)CH_(2)OH UNDERSET(170^(@))overset("conc. "H_(2)SO_(4))to underset('A')(CH_(3)CH=CH_(2)) underset(500^(@)C)overset(Cl_(2))to underset('B')(CH_(3)ClCH=CH_(2))`
Discussion
24.

CH_(3)CH_(2)CH_(2)OH is a functional isomer of

Answer»

`C_(2)H_(5)OCH_(3)`
`CH_(2)OC_(3)H_(7)`
`CH_(3)CH_(2)CH_(2)OCH_(2)CH_(3)`
`CH_(3)CHOHCH_(3)`

Answer :A
Discussion
25.

CH_3CH_2CH_2CH(CH=CH_2)CH_2CH_2CH_3 is

Answer»

4-Ethenylheptane
3-n-propyl-1-hexene
4-Ethenylhexane
3-Ethenylheptane

SOLUTION :IUPAC NOMENCLATURE of RULES
Discussion
26.

CH_(3)CH_(2)CH_(2)CH_(3) underset(hv)overset(Cl_(2))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`

ANSWER :B
Discussion
27.

CH_(3)CH_(2)CH = CH_(2)" and "CH_(3)CH = CH - CH_(3) show

Answer»

CHAIN isomerism
POSITION isomerism
Functional isomerism
Metamerism

SOLUTION :Position of double BOND is different
Discussion
28.

CH_3CH_2-undersetunderset(CH_3)|oversetoverset(CH_3)|C-undersetunderset(OH)|CH-CH_3 underset"heat"overset(H_2SO_4)tounderset"(Major)"P What is the major product P in the above reaction ?

Answer»

`CH_3CH_2-oversetoverset(CH_3)|CH-CH=CH_2`
`CH_3-oversetoverset(CH_3)|CH-oversetoverset(CH_3)|CH-CH=CH_3`
`CH_3CH_2-undersetunderset(CH_3)|oversetoverset(CH_3)|CH-CH=CH_3`
`CH_3CH_2-oversetoverset(CH_3)|C=oversetoverset(CH_3)|C-CH_3`

SOLUTION :
Discussion
29.

CH_3CH_2-CH=CH_2+HBr overset"ROOR"to underset"Major"[X]+underset"Minor"[Y] [X] and [Y] respectively are

Answer»

`BrCH_2CH_2CH=CH_2` and `C_2H_5-CHBr-CH_3`
`C_2H_5-CH_2CH_2-Br` and `Br-CH_2CH_2-CH=CH_2`
`C_2H_5-CH_2-CH_2Br` and `C_2H_5-CHBr -CH_3`
`C_2H_5CHBr-CH_3` and `C_2H_5-CH_2-CH_2Br`

SOLUTION :`CH_3CH_2-CH=CH_2+HBr OVERSET"RCOOR"to UNDERSET"[X]"(CH_3CH_2CH_2CH_2Br)+underset"[Y]"(CH_3CH_2-CHBr-CH_3) -=underset"[X]"(C_2H_5-CH_2CH_2Br) + underset"[Y]"(C_2H_5-CHBr-CH_3)`
Discussion
30.

CH_3Br + CH_3CH_2Br overset(Na//"dry either")to product. Possible product in the above reaction .

Answer»

`CH_3CH_2CH`
`CH_4`
`CH_3CH_2CH_2CH_3`
`CH_2=CH_2`

SOLUTION :This REACTION FOLLOWING freedical mechanism `overset(*)(C)H_3 & CH_3 overset(*)CH_2`, are the INTERMEDIATE freeradicals
`overset(*)(C)H_3 + overset(*)CH_3 to CH_3 , overset(*)CH_3 + CH_2CH_3 to CH_3CH_2CH_3,`
`CH_3 overset(*)(C)H_2 + overset(*)(C)H_2 CH_3 toCH_3CH_2CH_2CH_3`

`CH_3 + CH_3 - CH_3 to underset((b))(CH_4) + CH_3-CH_2`
Discussion
31.

(CH_(3))_(3)SiClis used during polymerisation of organosilicones because

Answer»

the chaing LENGTH of organosilicon polymers can be controlled by ADDING `(CH_(3))_(3)SICL`
`(CH_(3))_(3)SiCl` improves the quality and yields 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 :`(CH_(3))_(3)SiCl`is used to control the LENGTHOF the polymerchain.
Discussion
32.

(CH_3)_3CMgCl on reaction with D_2O produces

Answer»

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

ANSWER :A
Discussion
33.

(CH_(3))_(3)C=CHCOOH overset(A)rarr (CH_(3))_(2)C=CHCH_(2)OH The reagent A in the reaction is

Answer»

`H_(2)`/ether
`B_(2)H_(6)`
`LiAlH_(4)`/ether
`H_(2)-Pb//BaSO_(4)`

Solution :It is a case of reduction of `-COOH` GROUP when double bond is not REDUCED. This CHANGE is brought by `LiAlH_(4)`/ether.
Discussion
34.

(CH_(3))_(3)C Cl underset(Delta)overset(alc. KOH)rarr X overset(CF_(3)CO_(3)H)rarr Y, The product 'Y' is

Answer»

`CH_(2)=CH-CH_(2)OH`

`CH_(3)COCH_(2)CH_(3)`
`(CH_(3))_(2)CHCH_(2)OH`

Solution :`CH_(3)-UNDERSET(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Cl underset(vec(E_(2)))overset("ALCO. KOH")rarr CH_(3)-underset(CH_(3))underset(||)overset(CH_(3))overset(|)(C)`
Discussion
35.

(CH_(3))_(3) N is basicbut (CF_(3))_(3)N is not basic.Explain why ?

Answer»

SOLUTION :N has a LONE pair of electrons. But DUE to higher electronegativity of C `(2.5)` than that of `H(2.1)`, `CH_(3)` acts as an electron-donating group. It increasesthe electron density on N in `(CH_(3))_(3)N`.As a result, the lone pair of electrons on N in `(CH_(3))_(3)N` in easily availablefor potenationand hence`(CH_(3))_(3)N`acts a base.
In CONTRAST,due to muchhigher electronegativityof `F(4.0)` than that of `(2.5)`, `CF_(3)`acts a strong electron-withdrawinggroup.It considerably decreasesthe electron density of N in `(CF_(3))_(3)N`.As a result, the lone pairof electrons on N in `(CF_(3))_(3)N`is not available for protonationand hence `(CF_(3))_(3)N` does not act as a base.
Discussion
36.

(CH_(3))_(2)CHOH overset("Mild.oxid")rarrXunderset((ii) HOH)overset((i) CH_(3)MgBr)rarr Here Y is

Answer»

Isobutyl ALCOHOL
tert-Butyl alcohol
Isobutylene
sec-Butyl alcohol

Solution :`{:((CH_(3))_(2)CHOH UNDERSET("OXID".)overset("Mild")rarr(CH_(3))_(2)CO),(""darr underset((ii)H_(2)O)((i)CH_(3)MgBr)),(""(CH_(3))_(3)C-OH),("tertiary-Butyl alcohol"):}`
Discussion
37.

(CH_3)_2CH-CH_2CH_3overset(Cl_2//h upsilon)to[N]underset("distillation")overset("Fractional")to[P] The number of possible isomers [N] and number of fractions [P] are :

Answer»

(6,6)
(6,4)
(4,4)
(3,3)

ANSWER :B
Discussion
38.

(CH_(3))_(2)C=CHOCH_(3)overset((CH_(3))_(2)CO)underset(HCl)to 'X' Here 'X'is

Answer»

Mesityl oxide
Phorone
Acetic acid
Mesitylene

Answer :3
Discussion
39.

(CH_(3))_(2)C=CH-CH_(3)overset(H^(+)//KMnO_(4))rarr Products in this reaction

Answer»

`(CH_(3))_(2)C(OH)C(OH)CH_(3)`
`CH_(3)CHO+CH_(3)CHO`
`CH_(3)COCH_(3)+CH_(3)COOH`
`2CH_(3)COOH`

Answer :C
Discussion
40.

(CH_(3))_(2)C=C(CH_(3))_(2)overset((i)O_(3))overset((ii)Zn//H_(2)O)rarr X. X is

Answer»

ACETIC acid
PROPANONE
ACETALDEHYDE
ORGANO zinc COMPOUND

Answer :B
Discussion
41.

(CH_(3))_(2) CO underset((HCl))overset(NaCN)rarr X underset(Delta)overset(H_(3)O^(+))rarr Y In the above sequence of reactions X and Y 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_(3))_(2)C (OH) CN, (CH_(3))_(2) CHCOOH`
`(CH_(3))_(2)C (OH) CN, (CH_(3))_(2) C = O`

Solution :
Discussion
42.

(CH_3)_2 C - overset(OH)overset(|)CH-CH_3 overset(Conc. H_2SO_4)to X "(Major)" underset("Ozonalysis")overset("Reductive")toY then Y is

Answer»

ACETONE
METHANAL
Dimethylpropanal
B and c

Solution :
Discussion
43.

CH_3-undersetunderset(O)(||)C-CH_3+PhMgBrtoAoverset(H_3O^+)toBunderset(Delta)overset(H_3PO_4)toC C is :

Answer»

`Ph-undersetunderset(O)(||)C-CH_3`
`Ph-undersetunderset(OH)(|)oversetoverset(CH_3)(|)C-CH_3`
`Ph-undersetunderset(CH_3)(|)C=CH_2`
`Ph-undersetunderset(CH_3)(|)CH-CH_3`

ANSWER :C
Discussion
44.

CH_3-undersetunderset(CH_3)(|)CH-underset(Cl)underset(|)(CH)-CH_3 overset(EtOH//Delta)to Major elimination product X. X is :

Answer»

`CH_3-oversetoverset(CH_3)(|)CH-CH=CH_3`
`CH_3-oversetoverset(CH_3)(|)C=CH-CH_3`
`CH_3-OVERSET(C_2H_5)overset(|)C=CH_2`
`CH_3-oversetoverset(CH_3)(|)C=oversetoverset(CH_3)(|)C-CH_3`

ANSWER :B
Discussion
45.

CH_3-undersetunderset(H)(|)oversetoverset(CH_3)(|)C-CH_2Br underset(Delta)overset(Al KOH) toAlkene, Alkene is -

Answer»




ANSWER :A
Discussion
46.

CH_3-undersetunderset(CH_3)(|)CH-oversetoverset(Cl)(|)CH-CH_3 underset(Delta)overset(t-BuO) to Major Product is :

Answer»

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

ANSWER :B
Discussion
47.

CH_(3)- underset(underset(CH_(3))(|))(CH)-CH_(2) - underset(underset(CH_(3))(|))(CH)- group is in branch of molecule then what is the following name is correct? (i) 2, 4-dimethylbutyl (ii) 1, 3-dimethylbutyl

Answer»

Solution :(i) Because, the no 1 is given to SUBSTITUTE CARBON which is directly attach with PARENT CHAIN
Discussion
48.

CH_(3)- underset(underset(CH_(3))(|))(CH)-CH_(2)-CH_(2)-CH_(2)- underset(underset(CH_(2)-CH_(2)-CH_(3))(|))(CH)-CH_(2)-CH_(3) How many carbon containing parent chain in above structure?

Answer»

Solution :NINE CARBON containing parent CHAIN because

COMPONENT B is taken in SIMPLE chain so longest parent chain with nine carbon form
Discussion
49.

CH_3-undersetunderset(CH_3)(|)C=CH_2+HBr overset(R_2O_2)to Product is :

Answer»

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

ANSWER :A
Discussion
50.

CH_(3)-underset(OH)underset(|)CH-underset(OH)underset(|)CH-underset(OH)underset(|)CH-CH_(3) the number of optical isomers possible for this compound are

Answer»


SOLUTION :7 opticla ISOMERS
Discussion