Explore topic-wise InterviewSolutions in Current Affairs.

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1.

CH_(3) COOH overset(X)(to) CH_(3) COCl Here the reagent X can not be

Answer»

`PCl_5`
`PCl_3`
`SOCl_2`
`NACL`

ANSWER :D
Discussion
2.

CH_(3)COOHoverset(LiA1H_(1))toA A+CH_(3)COOHoverset(H_(J)O^(+))toB+H_(2)O In the above reactions '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) COO C_(2) H_(5)`

Answer :D
Discussion
3.

CH_3 COOH overset("1 mole" Cl_2//"Red" P)to A overset(KCN)to B overset(H^+//H_2 O)to C. Hence 'C' is

Answer»

OXALIC ACID
Maleic acid
Fumaric acid
Malonic acid

ANSWER :D
Discussion
4.

CH_3 COOH is less acidic than HCOOH. It is due to which effect

Answer»

`+1` of METHYL GROUP
`+M` of methyl group
`-1` of methyl group
`-M` of methyl group

ANSWER :A
Discussion
5.

CH_(3) COOH + CH_(3) O^(18)H overset(H^(+)) hArr A"(ester)" + B "(water)" Alcohol contain isotopic oxygen {O^(18)}. The isotopic oxygen will be in

Answer»

`CH_(3)COO^(18)CH_(3)+H_(2)O`
`CH_(3)COOCH_(3) + H_(2)O^(18)`
both are correct
none is correct

Solution :Esterification involves the BREAKING of C- O bond carboxylic AICD and O-H bond in alcohols.
Discussion
6.

CH_(3) COOH and HCOOH_(3) are a pair of

Answer»

`Metamers
Tautomers
FUNCTIONAL ISOMERS
GEOMETRICAL isomers

Answer :C
Discussion
7.

CH_3COOAg + C_2H_5Cl rarr A(organise) Wrong statement about 'A' is

Answer»

A is an ester
IUPAC NAME of 'A' is ethylethanoate
Functional GROUP ISOMER of 'A' is BUTYRIC acid
All carbons in 'A' are `sp^2` hybridised

Answer :D
Discussion
8.

CH_3 COClunderset(BaSO_4) overset(Pd,H_2) toX,Xis

Answer»

acetaldehyde
propionaldehyde
acetone
ACETIC acid

Solution :`CH_3 COCI UNDERSET(BaSO_4) OVERSET(Pd,H_2) to underset("ACETADEHYDE") (CH_3 CHO )`
Discussion
9.

CH_3 CONH_2is a weaker base than CH_3 CH_2 NH_2.

Answer»

Solution :`CH_3 - overset(O ) overset(||)C-`group in `CH_3 CONH_2`, withdraws electron pair on the NITROGEN through resonance.

As a result, electron density on the N-atom in ACETAMIDE decreases. On the other hand, in ETHYLAMINE, DUE to +I effect of the ethyl group, electron density on the N-atom increases. CONSEQUENTLY, `CH_3 CONH_2` is a weaker base than `CH_3 CH_2 NH_2`.
Discussion
10.

CH_(3) - CO - CH_(3) " and "CH_(2) = COH - CH_(3) are

Answer»

metamers
tautomers
geometrical isomers
optical isomers

Answer :B
Discussion
11.

CH_3 - Cl overset(KCN)(to)A overset(H^(+)//H_2O)(to)B the compound B is

Answer»

`CH_3NH_2`
`HCOOH`
`CH_3COOH`
`CH_3COCH_3`

SOLUTION :`CH_3-Cl overset(KCN) CH_3 - CN overset(H^(+)// H_2O)(to) CH_3 - COOH`
Discussion
12.

CH_3 CN + H_2 O overset(H^+)to A underset("Red "P)overset("Excess" Cl_2)to B. In the above reaction A and B are respectively

Answer»

`CH_(3) COOH , C Cl_(3) COOH`
`CH_(3) CH_(2) OH , CH_(3) CH_(2) Cl`
`CH_(3) CHO , C Cl_(3) CHO`
`CH_(3) CO CH_(3) , C Cl_(3) CO CH_(3)`

Answer :A
Discussion
13.

CH_(3) Cl overset(KCN)(to) A overset(H^(+) // H_(2) O)(to) B overset(NH_(3)) (to) C overset(Delta)(to) D . Compound D is

Answer»

`CH_(3) CH_(2) NH_(2)`
`CH_(3) CN`
`HCONH_(2)`
`CH_(3) CONH_(2)`

ANSWER :D
Discussion
14.

CH_3 - CH=O+PhCH_2-CH=O overset(HO^(Theta))to mixture of aldols (z) total number of aldols including stereoisomers Find the mole of z ?

Answer»


SOLUTION :`CH_3-CH=O+PhCH_2-CH=Ooverset(HO^(THETA),Delta)toCH_3-undersetunderset(OH)(|)OVERSET(**)CH-CH_2-CHO+oversetoverset(Ph)(|)CH_2-undersetunderset(OH)(|)overset(**)CH-undersetunderset(Ph)(|)overset(**)CH-CHO+Ph-CH_2--undersetunderset(OH)(|)overset(**)CH-CH_2-CHO+CH_3-undersetunderset(OH)(|)overset(**)CH-oversetoverset(Ph)(|)CH-CHO`
Discussion
15.

CH_(3)-CHO + HCN rarr A, Compound A on hydrolysis gives

Answer»

`CH_(3)-CH_(2)-COOH`
`CH_(3)-CH_(2)-CH_(2)-NH_(2)`
`CH_(3)-CO-COOH`
`CH_(3)-underset(OH)underset(|)(CH)-COOH`

Solution :`CH_(3)CHO+HCNrarr CH_(3)underset((A))(C-OVERSET(OH)overset(|)underset(H)underset(|)(C)-C)Noverset(H_(3)O^(+))rarrCH_(3)-overset(OH)overset(|)underset(H)underset(|)(C)-COOH`
Discussion
16.

CH_3-CH=O+CH_3CH_2-CH=Ooverset(HO^(Theta)Delta)to mixture of aldols (z) total number of aldols including stereoismers. Find the mole of z ?

Answer»


Solution :`CH_3-CH=O+CH_3CH_2-CH=Ounderset(HO^(Theta),DELTA)toCH_3-undersetunderset(OH)(|)OVERSET(**)CH-undersetunderset(CH_3)(|)overset(**)CH-underset((4))(CHO)+overset(CH_3)overset(|)CH_2-undersetunderset(OH)(|)overset(**)CH-undersetunderset(CH_3)(|)overset(**)CH-underset((4))(CHO)+CH_3-CH_2-undersetunderset(OH)(|)overset(**)CH-underset((2))(CH_2)-CHO+CH_3-undersetunderset(OH)(|)overset(**)CH-underset((2))(CH_2)-CHO` (z=12)
Discussion
17.

CH_(3)CHO and C_(6)H_(5)CHO can be distinguished by

Answer»

Baeyer's reagent
TOLLEN's reagent
SCHIFF's reagent
`I_2+ NaOH`

ANSWER :D
Discussion
18.

CH_3 CHO+ CH_3 CH_2 CHO overset( NaOH. Delta ) to Which one of the following compounds is not the product in the above reaction?

Answer»

`CH_3 CH= CHCHO`
` CH_3CH_2CH= CHCCH_2CHO`
` CH_3CH= C(CH_3) CHO`
` CH_3CH_2CH=CHCHO`

Answer :B
Discussion
19.

CH_(3)-CHCl-CH_(2)-CH_(3) has a chiral centre. Which one of the following represents its R - configuration ?

Answer»

`H-overset(C_(2)H_(5))overset("|")UNDERSET("CL ")underset("| ")("C ")-CH_(3)`
`H-overset(CH_(3))overset("|")underset(C_(2)H_(5))underset("|")("C")-Cl`
`Cl-overset(C_(2)H_(5))overset("|")underset("H ")underset("| ")("C ")-CH_(3)`
`H_(3)C-overset(C_(2)H_(5))overset("|")underset("H ")underset("| ")("C")-Cl`

Solution :
R - configuration i.e., option (C ) is correct.
Discussion
20.

CH_(3)-CH=CH_(2)overset(SO_(2)Cl_(2))underset(" light ")rarr (A). The (A) is ….

Answer»

`Cl-CH_(2)-CH=CH_(2)`
`CH_(3)-UNDERSET("Cl ")underset("| ")("C ")H-CH_(3)`
`CH_(3)-underset("Cl ")underset("| ")("C ")H-underset("Cl ")underset("| ")("C ")H_(2)`
`Cl-CH_(2)-CH_(2)-CH_(2)-Cl`

SOLUTION :In presence of LIGHT, `SO_(2)Cl_(2)` gives allyl CHLORIDE with ALKENES.
Discussion
21.

CH_(3) - CH(Cl) - C_(2)H_(5) overset(Alc.KOH)(rarr) CH_(3) - CH = CH - CH_(3) The above reaction proceeds via ElcB mechanism. Which of the followiingstatements is true about ElcB mechanism?

Answer»

It is secound ORDER and bimolecular.
It is FIRST order and unimolecular.
It is first order and unimolecular.
It is secound order of unimolecular.

Solution :NA
Discussion
22.

CH_(3)-CH=CH_(2)overset(NOC)rarr Product, product is:

Answer»

`CH_(3)-UNDERSET(Cl)underset(|)CH-CH_(2)-NO`
`CH_(4)-underset(OH)underset(|)(CH)-CH_(2)-Cl`
`CH_(4)-CH_(2)-CH_(4)-Cl`
`NO-CH_(2)-CH_(2)-CH_(2)-Cl`

SOLUTION :N//A
Discussion
23.

CH_(3)-CH=CH_(2)overset(Br_(2))underset(773 K)rarr (A). The (A) is ……

Answer»

`CH_(3)-underset("CL ")underset("| ")("C ")H-CH_(3)` <BR>`CH_(3)-underset("Cl ")underset("| ")("C ")H-underset("Cl ")underset("| ")("C ")H_(2)`
`Cl-CH_(2)-CH=CH_(2)`
`CH_(3)-CH_(2)-CH_(2)-Cl`

SOLUTION :At hight temperature, ALKENES react with `Cl_(2)` or `Br_(2)` to form allyl halides.
Discussion
24.

CH_(3) CH=CH_(2) overset("HI")underset("R_(2)O_(2) ")(rarr)A overset("aq. NaOH")(rarr)B In this sequence of reaction A and B are respectively

Answer»

`CH_(3)CH_(2)CH_(2)I,CH_(3)CH_(2)CH_(2)OH`
`CH_(3)CH_(2)CH_(2)I,CH_(3)CH=CH_(2)`
`CH_(3)CHICH_(3),CH_(3)CHOHCH_(3)`
`CH_(3)CHICH_(3),CH_(3)CH=CH_(2)`

Answer :C
Discussion
25.

CH_3-CH=CH_2 reacts with Cl_2 at 500^@C Find out total no . Of possible products.

Answer»


SOLUTION :
Discussion
26.

CH_3-CH = CH_2+NOCl rarrP, Identify the adduct.

Answer»

`CH_3-undersetunderset(CL)|CH-undersetunderset(NO)|CH_2`
`CH_3-undersetunderset(Cl)|CH-undersetunderset(NO)|CH_2`
`CH_3-CH_2-undersetunderset(Cl)|oversetoverset(NO)|CH`
`undersetunderset"NO"|CH_2-CH_2-undersetunderset(Cl)|CH_2`

Solution :`underset"propylene"(CH_3-CH)=CH_2+NbarOCl^(+)to underset"Propylene nitroso chloride"(CH_3-undersetunderset(Cl)|CH-undersetunderset(NO)|CH_2)`
This reaction is an example of electrophilic addition reaction and in it addition takes place according to Markownikoff's rule.
("NEGATIVE part of additive reagent adds less hydrogenated or more substituted CARBON atom of double bond of unsymmetrical alkene"). It is also REPRESENTED in form of following mechanism
Discussion
27.

CH_(3)-CH=CH_(2)+H_(2)O overset(H_(2)SO_(4)) to A Pick out the correct statement _______

Answer»

A' is isopropyl alcohol and the reaction is Markoni Koff's ADDITION.
A' is isopropyl alcohol and the reaction is nucleophili addition of water.
A' is PROPYL alcohol and the reaction involves NUCLEOPHILIC ATTACK of water followed by protonation
both (a) and (b) are correct

ANSWER :A
Discussion
28.

CH_(3)-CH=CH_(2)+Cl_(2)+" Methanolic NaBr " to "product(s)" Which products is not formed during this reaction?

Answer»

1,2-dichloropropane
1-chloro-2-methyoxypropane
1-bromo-2-methyoxypropane
2-bromo-1-chloropropane

Solution :N//A
Discussion
29.

CH_(3)-CH=CH-underset(O)underset(||)(C)-CH_(3)+NH_(2)-OHoverset(H^(o+))(to) major product is

Answer»

`CH_(3)-UNDERSET(NH_(2))underset(|)(CH)-underset(OH)underset(|)(CH)-underset(O)underset(||)(C)-CH_(3)`
`CH_(3)-underset(OH)underset(|)(CH)-underset(NH_(2))underset(|)(CH)-underset(O)underset(||)(C)-CH_(3)`
`CH_(3)-CH=CH-underset(CH_(3))underset(|)(C)=N-OH`
`CH_(2)-underset(OH)underset(|)(CH)-CH_(2)-underset(O)underset(||)(C)-CH_(3)`

Answer :C
Discussion
30.

CH_(3)-CH=CH-underset(H)underset(|)overset(OH)overset(|)(C )-CH=CH-CH_(3) Give total number of stereoisomers of above compound.

Answer»


SOLUTION :`2^(2) = 4`
Discussion
31.

CH_(3)-CH=CH-CH(OH)-CH_(3)underset("reagent")overset("Jone's")to X, Product X is

Answer»

`CH_(3)CH_(2)CH_(2)CH(OH)CH_(3)`
`CH_(3)CH=CHCOCH_(3)`
Both (a) & (B) are correct
`CH_(3)CH_(2)CH_(2)COCH_(3)`

Answer :B
Discussion
32.

CH_(3)-CH=CH-CHO overset(OH^(-))underset("aldol")to overset(Delta)to A A is

Answer»

`CH_(3)(CH=CH)_(3)CHO`
`CH_(3)CH_(2)CH_(2)(CH=CH)_(2)CHO`
`CH_(3)(CH_(2)CH_(2))_(2)CH=CH-CHO`
None of the above

ANSWER :A
Discussion
33.

CH_(3)-CH_(2)C-=Noverset(x)CH_(3)CH_(2)CHO. The compound X is

Answer»

`SnCl_(2)//HCL//H_(2)O`, boil
`H_(2)//Pd-BaSO_(4)`
`LiAIH_(4)//`ehter
`NaBH_(4)//"ether"//H_(3)O^(+)`

Solution :It is Stephen's reaction,
`CH_(3)CH_(2)C-=Noverset(HCl)rarr[CH_(3)CH_(2)C-=NH]^(+)Cl^(-)`
`overset(SnCl_(2)//HCl)rarr[CH_(3)-CH_(2)CH=NH_(2)]^(+)SnCl_(6)^(2-)`
`overset(H_(2)O //"Boil")rarrCH_(3)CH_(2)CHO+NH_(4)Cl`
Discussion
34.

CH_(3)-CH_(2)CH_(2)CH_(2)-CH_(3)overset(CH_(2)N_(2)//Delta)rarrProduct Whichof the following product(s)is/are can be abtained in the above reaction.

Answer»

Isopentane
3-Methyl hexane
n-pentane
3-Methyl pentane

Solution :(d) INSERTION REACTION.
Discussion
35.

CH_(3)-CH_(2)-underset(I)underset(|)(CH)-CH_(3)

Answer»

SOLUTION :But-2-ene on REACTION with hydrogen IODIDE forms 2-Iodobutane.
`underset("But-2-ene")(CH_(3)-CH=CH-CH_(3)+HI) to CH_(3)-CH_(2)-underset(I)underset(|)(CH)-underset("2 Iodobutane")(CH_(3))`
Discussion
36.

CH_3- CH_2 - oversetunderset(|)(CH_3)(C )H - CH_2-CH_3 underset("monochlorination")overset(Cl_2//hv)(to) PHow many number of isomeric produces (P) are formed.

Answer»


SOLUTION :
Discussion
37.

CH_3 -CH_2 -underset( O) underset(||) C - CHO overset( NaBH_4) toProduct (s) in the above reaction is (are)

Answer»

` CH_3 CH_2 COOH +CO_2`
` CH_3 CH_2 COCH_2OH`
`CH_3 CH_2 CH (OH) CH_2 OH`
` CH_3 CH_2 CH( OH) CHO`

ANSWER :C
Discussion
38.

CH_(3)-CH_(2)-overset(O)overset(||)(C )-OC_(2)H_(5) overset(Naoverset(**)(O)H)underset(H_(2)O^(**))rarr Products of the above reaction contain

Answer»

`CH_(3)-CH_(2)-OVERSET(O)overset(||)(C )-overset(**)(O^(-))`
`CH_(3)-CH_(2)-overset(O^(**))overset(||)(C )-O^(-)`
`CH_(3)CH_(2)-overset(**)(O)-H`
Both (a) and (B)

Solution :
Discussion
39.

CH_3 CH_2 OH overset( Conc. H_2SO_4 , 413K) to C_2H_5OC_2H_5 It follows which maechanism ?

Answer»

` S_N1`
` SN_2`
` E_1`
`E_2 `

ANSWER :B
Discussion
40.

CH_(3)-CH_(2)-O-underset(CH_(3))underset(|)(C)=CH_(2)overset(H_(3)O^(oplus))rarrProducts are

Answer»




ANSWER :A
Discussion
41.

CH_(3)-CH_(2)-O-CH_(2)CH_(3) and CH_(3)-O-overset(CH_(3))overset(|)(CH)-CH_(3) are example of ______ isomerism.

Answer»

FUNCTIONAL
CHAIN isomerism
position
METAMERISM

ANSWER :D
Discussion
42.

CH_(3) CH_(2) I overset(" Zn-Cu couple/ EtOH ")(to) A. Identify A.

Answer»

SOLUTION :`A IMPLIES CH_(3) - CH_(3)` (ETHANE)
Discussion
43.

CH_3 - CH_2 - O - CH_2 - CH_3 underset("Anhydrous " ZnCl_2)overset(CH_3COCI) to A + B In the above reaction A and B are ………………….. .

Answer»

`CH_3CH_2OH + CH_3 - CH_2Cl`
`CH_3- CH_2Cl + CH_3COOH`
`CH_3COOH + CH_3COOCH_3`
`CH_3 - CH_2Cl + CH_3COOCH_2CH_3`

SOLUTION :`CH_3 - CH_2Cl + CH_3COOCH_2CH_3`
Discussion
44.

CH_(3)-CH_(2)-O-CH_(2)-CH_(3)overset(CH_(3)COCl)underset("Anhydrous "ZnCl_(2))rarr A+B In the above reaction A and B are

Answer»

`CH_(3)CH_(2)OH+CH_(3)-CH_(2)CL`
`CH_(3)-CH_(2)Cl+CH_(3)COOH`
`CH_(3)COOH+CH_(3)COOCH_(3)`
`CH_(3)-CH_(2)Cl+CH_(3)COOCH_(2)CH_(3)`

SOLUTION :`CH_(3)-CH_(2)Cl+CH_(3)COOCH_(2)CH_(3)`
Discussion
45.

CH_(3) - CH_(2) - COOHis can be obtained in the following synthesis

Answer»

`CH_(3) - CH_(2) - CN overset(OH^(-)) to `
`CH_(3) - CH_(2)-CN overset(H_(3)O^(+)) to `
`CH_(3) - CH_(2) - CN overset(N_(2)+Ni) to `
`CH_(3) - CH_(2) - CN overset(CH_(3)MgX) to `

ANSWER :B
Discussion
46.

CH_3 CH_2 COOH underset("Red P")overset(Br_2)to X underset("alcohol")overset(NH_3)to Y Y in the reaction is

Answer»

Lactic ACID
ETHYLAMINE
Propylamine
ALANINE

Answer :D
Discussion
47.

CH_3CH_2 COOH overset(Cl_2//"Red" P)to A overset("aq. KOH")to B. Here 'B' is

Answer»

Succinic ACID
LACTIC acid
Pieric acid
Malonic acid

ANSWER :B
Discussion
48.

CH_(3)-CH_(2)-CH(Cl)-CH-CH_(3) obtained by chlorination of n-butane will be

Answer»

I-FORM
d-form
Meso form
Racemicmixture

Solution :Chlorination of n-butane taken PLACE VIA free radical formation i.e., `Cl_(2)overset(hv)(to)Cl^(-)+Cl^(-)`

`Cl^(-)` may attack on either SIDE and GIVE a racemic mixture of2 chloro butane which contain 50% d form and 50% l-form.
Discussion
49.

CH_(3)-CH_(2)-CH=CH_(2) has hybridisation :

Answer»

`SP,sp,sp^(2),sp^(2)`
`sp^(3),sp^(3),sp^(2),sp`
`sp^(3),sp^(3),sp^(2),sp^(2)`
`sp^(3),sp^(2),sp^(2),sp`

ANSWER :C
Discussion
50.

CH_3-CH_2-CH_3underset((1))overset(B_2//hv)to(X)underset((2))overset(Mg//ether)to(Y)underset((3))overset(CH_3-Br)to(Z)underset((4))overset(Cl_2//hv)to(W)underset((5))overset(CH_3OH)to(R) The product R is :

Answer»

`CH_3-oversetoverset(CH_3)(|)CH-CH_2-OCH_3`
`CH_3-CH_2-CH_2-CH_2-OH`
`CH_3-undersetunderset(OCH_3)(|)oversetoverset(CH_3)(|)C-CH_3`
`CH_3-undersetunderset(OH)(|)oversetoverset(CH_3)(|)C-CH_3`

SOLUTION :
Discussion