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.

Alkyl chloride on dehydrochlorination produces 2 alkenes (C_6H_(12) which on ozonolysis form four compounds (i)CH_3CHO,(ii)CH_3CH_2CHO,(iii) CH_3COCH_3 & (iv) (CH_3)_2CHCHO. The alkenes are-

Answer»

4-methypent-2-ene and 2-methylpent-2-ene
2-methylpent-2-ene and 2,3-dimethylbut -2-ene
4-methylpent-2-ene and hex-3-ene
2-methylpent-2-ene and hex-3-ene

Answer :A
Discussion
2.

Alkyl bromide on treatment with silver fluoride gives alkyfluoride. What is this reaction known as ?

Answer»

SOLUTION :SWARTS REACTION
Discussion
3.

Alkyl bromide is

Answer»

` CH_2 =CH -CH_2 BR `
` C_6H_5 -Br `
` H_2C=OVERSET( Br) overset(|) CH`
`CH_3 -CH =CH_2 -Br`

ANSWER :A
Discussion
4.

Alkyl benzene sulphonates can be used as detergents in hard water, unlike soaps, as

Answer»

They are highly soluble in WATER
Their `Ca^(++)//MG^(++)` SALTS are water soluble
They are non-ionic
Their `Ca^(++)//Mg^(++)` salts are INSOLUBLE in water

Solution :Because their `Ca^(++)//Mg^(++)` salts are soluble in water.
Discussion
5.

Alkyl benzene on oxidation by alkaline KmnO_(4) gives

Answer»

ALDEHYDE
KETONE
CARBOXYLIC acid
esters

ANSWER :C
Discussion
6.

Alkyl benzene is converted in to carboxylic acid by using

Answer»

NaOX
`KOH+KMnO_(4)`
`O_(3)`
COLLIN's reagent

Answer :B
Discussion
7.

Alkyl amines are strong base than ammonia. Justify this statement.

Answer»

SOLUTION :When a+I GROUP like and ALKYL group is attached to the nitrogen increase the electron density on nitrogen which makes the electron pair readily availble for protonation. Hence alkyl amines are STRONGER than amonia.
`underset("Alky amine") (RNH_(2)) underset("more basic")(gt)underset("Ammonia")(NH_(3))`
Discussion
8.

Alkyl amines are stronger bases than aryl amines. Explain.

Answer»

Solution :Because alkyl groups are electron releasing (+I) effect. Therefore they are STRONGER bases than aryl amines because aryl group is electron withdrawing (-I) effect. So, electron density is less on N. It is also due to +ve charge on NITROGEN on 3 out of 5 resonating STRUCTURES.
Discussion
9.

Alkyl amines are strong base than………………..

Answer»


ANSWER :AMMONIA
Discussion
10.

Alkyl resins, made of glycerol are used :

Answer»

As SUBSTITUTE for WHITE chalk
Instead of alkanes
For PAINTS and coatings
For MAKING alcohol

Answer :C
Discussion
11.

Alkoxy group attached to benzene ring is ortho and para directing. Justify.

Answer»

Solution :Alkoxy (R-O) GROUP with +M -effect ACTIVATES the ortho and PARA positions in the ring towards ELECTROPHILIC substitution
Discussion
12.

Alkenes usually undergo :

Answer»

ADDITION reactions
Substitution reactions
Elimination reactions
None of these

Answer :A
Discussion
13.

Alkenes react rapidly with bromine in non-nucleophilic solvents to form vicinal dibromides.This reaction can be best described as

Answer»

ELECTROPHILIC addition
Nucleophilic addition
Nucleophilic substitution
Electrophilic substitution

Answer :A
Discussion
14.

Alkenes convert into alcohols by

Answer»

HYDROLYSIS by dill. `H_2SO_4`
HYDRATION of alkene by CONC. `H_2SO_4`
hydrolysis by WATER VAPOURS and conc. `H_2SO_4`
hydration of alkene by aqueous KOH

Answer :B
Discussion
15.

Alkenes can be oxidized in presence of different reagents to give different products. Alkenes on oxidation in presence of silver at high temperature give cyclic ethers, which also can be synthesized by using per acids. Alkenes on reductive ozonolysis give carbonyl compounds in presence of zinc and peroxide. On reaction with acidic KMnO4, it also produces corresponding carbonyl compound. Alkynes can also be oxidized in presence of such reagents but the products are different. A hydrocarbon (C_8H_16) on oxidation with a hot acidified solution of KMnO_4 forms 2-buanone and isobutyric acid. The hydrocarbon is

Answer»

`(CH_3)_3=C(CH_2CH_3)_2`


ANSWER :D
Discussion
16.

Alkenes can be oxidized in presence of different reagents to give different products. Alkenes on oxidation in presence of silver at high temperature give cyclic ethers, which also can be synthesized by using per acids. Alkenes on reductive ozonolysis give carbonyl compounds in presence of zinc and peroxide. On reaction with acidic KMnO4, it also produces corresponding carbonyl compound. Alkynes can also be oxidized in presence of such reagents but the products are different. A hydrocarbon (C_8H_8) absorbs two moles of hydrogen in the presence of a platinum caralyst. The reduction product is inert to bromine and KMnO_4 solution. The hydrocarbon on ozonolysisproduces malonic acid only. The structure of hydrocarbon is

Answer»

`CH_2=CH-CH=CH-CH=CH_2`


ANSWER :C
Discussion
17.

Alkenes can be oxidized in presence of different reagents to give different products. Alkenes on oxidation in presence of silver at high temperature give cyclic ethers, which also can be synthesized by using per acids. Alkenes on reductive ozonolysis give carbonyl compounds in presence of zinc and peroxide. On reaction with acidic KMnO4, it also produces corresponding carbonyl compound. Alkynes can also be oxidized in presence of such reagents but the products are different. An open chain hydrocarbon (C_7H_12), on ozonolysis produces, methanol and 2-oxopropanal. The hydrocarbon could be

Answer»



EITHER of these
None of the above

Answer :C
Discussion
18.

Alkenes can be oxidized in presence of different reagents to give different products. Alkenes on oxidation in presence of silver at high temperature give cyclic ethers, which also can be synthesized by using per acids. Alkenes on reductive ozonolysis give carbonyl compounds in presence of zinc and peroxide. On reaction with acidic KMnO4, it also produces corresponding carbonyl compound. Alkynes can also be oxidized in presence of such reagents but the products are different. Ethane on reaction with MCPBA in CH_2Cl_2 forms a compound (A), which on reaction with CH_2-Mgl and subsequent hydrolysis gives a compound (B). (A) and (B) are, respectively

Answer»




ANSWER :C
Discussion
19.

Alkenes can be oxidized in presence of different reagents to give different products. Alkenes on oxidation in presence of silver at high temperature give cyclic ethers, which also can be synthesized by using per acids. Alkenes on reductive ozonolysis give carbonyl compounds in presence of zinc and peroxide. On reaction with acidic KMnO4, it also produces corresponding carbonyl compound. Alkynes can also be oxidized in presence of such reagents but the products are different. Cyclohexene is allowed to react with ozone and subsequently with H_2O_2 and water. The product formed is

Answer»

OXALIC acid
malonic acid
succinic acid
adipic acid

Answer :D
Discussion
20.

Alkenes are obtained from alcohols by

Answer»

OXIDATION
HYDRATION
intermolecular dehydration
INTRAMOLECULAR dehydration

Answer :D
Discussion
21.

Alkenes and carbonyl compounds both contain a pi bond but alkenes show electrophilic addition reaction whereas carbonyl compounds show nucleophilic addition reactions. Explains.

Answer»

Solution :In alkenes, the double bond is formed between two carbon atoms. There is no polarity in the bond. Butit polarises molecules like `Cl_(2), HCl, H_(2)O` ETC., resulting it in the attachment of ELECTROPHILE to one of the carbon atoms.
In carbonyl compounds, the double bond is between C and O. Oxygen being electronegative than carbon, the latter attains a SLIGHT POSITIVE charge. This positive carbon attracts the nucleophile giving rise to nucleophilic addition reactions.
Discussion
22.

Alkenes (A) and (B) yield the same alcohol (C) on hydration. On vigorous oxidation with KMnO_4, (A) gives a carbonyl compound (D) and an acid (E) each containing four carbon atoms. On the other hand, (B) gives an acid (E) and a carbonyl compound (G). In (G) no two identical groups are attached to the same carbon atom. Give the structures of (A) to (G).

Answer»

SOLUTION :(i)SINCE alkene (A) on oxidation gives a carbonyl compound (D) and an acid (E)of four carbon atoms each.

(ii) Alkene (A) and (B) give same alcohol on hydration and THUS compound (B) can only be

(iii) Hydration of (A) and (B) give the same alcohol:
Discussion
23.

Alkene R-CH=CH_2 reacts readily with B_2H_6 and the product on oxidation with alkaline hydrogen peroxides produces

Answer»

`R-CH_2-CHO`
`R-CH_2-CH_2-OH`
`R-undersetunderset(O)(||)C-CH_3`
`R-undersetunderset(OH)|CH-undersetunderset(OH)|CH_3`

SOLUTION :
Discussion
24.

Alkene can be prepared from alkyl halide by the following reagent R-X+Nu^(-) toAlkene + NuH

Answer»

ALC. KOH heat
Aq. KOH + COLD water
NaOH
LiOH

Answer :A
Discussion
25.

Alkene-1 on hydroboration followed with action of H_2O_2 gives:

Answer»

Alkanol-2
Alkanol-1
Alkanal
Alkanone

Answer :C
Discussion
26.

Alkanes mainly show reactions involving :

Answer»

Carbonium
Ionicelimination
IONIC FORMATION
Heat/photochemical substitution

Answer :D
Discussion
27.

Alkanes are inert is nature, why ?

Answer»

Solution :Alkanes are quite inert substances with highly stable nature. Their inactiveness has been explained as:
(i) Alkanes have all the `C-C` and `C-H` bons being stronger a bonds and are not INFLUENCED by acid, oxidants under ordinary CONDITIONS.
(II) The `C-C` bond is completely non polaar and `C-H` is weak polar. Thus polar species i.e. electrophiles or NUCLEOPHILES are unable to attack these bonds under ordinary conditions.
Discussion
28.

Alkene R - CH = CH_2 reacts readily with B_2H_6 and the product on oxidation with alkaline hydrogen peroxide produces

Answer»

`R - COCH_3`
`R - CH_2 - HO`
`{:(RCH-CH_2),(|""|),(OH""OH):}`
`RCH_2CH_2OH`

ANSWER :D
Discussion
29.

Alkane mainly shows free radical substitution reaction. Free radical is electrically neutral species having one unpaired electron. All the reaction of alkane involves homolytic fission in presence of light energy. The reaction is exothermic. The reactivity of the halogen is F_(2) gt Cl_(2) gt Br_(2) gt I_(2). More the reactivity of halogen less the selectivity for reaction with free radical. the stability of free radical depends on hyperconjugation. the order is ter>sec>prim>CH_(3)^(**). Breaking a tertiary C-H bond requires the least energy and breaking of primary C-H bond require the most. Q. The smallest chloro alkane which on halogenation produces disteromers is

Answer»

3-methyl ,3-chloro hexane
2-chloro pantane
3-chloro pantane
none

Answer :B
Discussion
30.

Alkane mainly shows free radical substitution reaction. Free radical is electrically neutral species having one unpaired electron. All the reaction of alkane involves homolytic fission in presence of light energy. The reaction is exothermic. The reactivity of the halogen is F_(2) gt Cl_(2) gt Br_(2) gt I_(2). More the reactivity of halogen less the selectivity for reaction with free radical. the stability of free radical depends on hyperconjugation. the order is ter>sec>prim>CH_(3)^(**). Breaking a tertiary C-H bond requires the least energy and breaking of primary C-H bond require the most. Q. 2-chlorophenothane on halogenation with chlorine give products gives 2,3, dichloropentane. what will the structure of free radical form in reaction ?

Answer»

Planner
Trigonal planner
Square planner
Pyramidal

Answer :B
Discussion
31.

Alkane mainly shows free radical substitution reaction. Free radical is electrically neutral species having one unpaired electron. All the reaction of alkane involves homolytic fission in presence of light energy. The reaction is exothermic. The reactivity of the halogen is F_(2) gt Cl_(2) gt Br_(2) gt I_(2). More the reactivity of halogen less the selectivity for reaction with free radical. the stability of free radical depends on hyperconjugation. the order is ter>sec>prim>CH_(3)^(**). Breaking a tertiary C-H bond requires the least energy and breaking of primary C-H bond require the most. Q. What will be major product formed when 2 methyl butene undergoes bromination in presence of light ?

Answer»

1-bromo-2-methyl butene
2-bromo-2-methyl butene
1-bromo-2,3-dimethyl-1-butene
none

Answer :B
Discussion
32.

Alkanamide, which on Hofmann's reaction gives 1- phenylethylamine, is :

Answer»

2- phenylpropanamide
3- phenylpropanamide
2- phenylethanamide
N- phenylethanamide

ANSWER :A
Discussion
33.

Alkaloids are poisonous and habit forming yet many of them are used as potent medicines, can you name the alkaloid used for the treatment of (i) hypertension, (ii)malaria fever and (iii) severe pain ?

Answer»

Solution :(i)HYPERTENSION : RESERPINE , (II) Malaria FEVER : QUININE and (iii) Severe pain : Morphine.
Discussion
34.

Alkaline solutionof NH_(4)Cl givesppt with K_(2)HgI_(4)

Answer»


Solution :`NH_(2)CI + NAOH rarr NH_(3) + NACI +H_(2)O`
`3NaOH +NH_(3) + 2K_(2)HgI_(4) rarr 4KJ + 3NaI + 2H_(2)O`
Discussion
35.

Alkaline solution of copper sulphate containing sodium potassium tartrate is called as _____.

Answer»

SOLUTION :ROCHELLE SALT
Discussion
36.

Alkaline sodium nitroprusside is used to confirmthe presence of

Answer»

ALDEHYDE
All KETONES
Ketone having `alpha` - HYDROGEN atom
SECONDARY and tertiary ALCOHOLS

Answer :B
Discussion
37.

Alkaline Noverset(o+)(H)_(4) salt give brown ppt with K_(2)HgI_(4) brown ppt Is called ______(a)_____.

Answer»


ANSWER :a. IODIDE or MILLON's `(##KSV_P2_CHM_C08_E01_293_A01##)`
Discussion
38.

Alkaline medium

Answer»

Solution :In alkaline medium : It depends upon the change in oxidation STATE.
(i) When the oxidation state of Mn changes from +7 to +6, `therefore E_(KMnO_(4))=(158)/(1)=158`
(II) When the oxidation state of Mn changes from +7 to +2. `therefore E_(KMnO_(4))=(158)/(3)=52.67`
Discussion
39.

Alkaline KMnO_(4) used for the detection of unsaturation in organic compounds is called.................

Answer»

SOLUTION :Baeyer.s REAGENT.
Discussion
40.

AlkalineKMnO_(4) coverts ethyleneinto :

Answer»

ETHANE
acetic ACID
ETHYLENEGLYCOL
glycerol

ANSWER :C
Discussion
41.

Alkaline hydrolysis of which among the following compounds leads to the formation of a racemate ?

Answer»

1-Bromo-1-phenylethane
1-chloro-3-methylbutane
Bromomethane
1-Chloropropane

Answer :A
Discussion
42.

Alkaline hydrolysis of esters is……. than acid hydrolysis.

Answer»

FASTER
Slower
Equal to
NONE of the above STATEMENT is correct

Answer :A
Discussion
43.

Alkaline hydrolysis of R_2C.Cl_2 forms:

Answer»

Propanone
Propene
Alkanone
Alkanal

Answer :C
Discussion
44.

Alkaline hydrolysis of esters is known as

Answer»

Saponification
Hydration
Esterification
Alkalisation

Answer :A
Discussion
45.

Alkaline hydrolysis of cooking oil gives

Answer»

SOAP
GLYCEROL
FATTY ACID
both (a) and (b)

Solution :both (a) and (b)
Discussion
46.

Alkaline hydrolysis of ester is an example of

Answer»

1ST ORDER reaction
2nd order reaction
zero order reactin
pseudo 1st order reaction

Answer :B
Discussion
47.

Alkaline hydrolysis of an ester is called

Answer»

NEUTRALISATION
Esterification
Polymerisation
Saponification

Answer :D
Discussion
48.

Alkaline hydrolysis if 1,1-dichloroalkane yields:

Answer»

Alkanal
Alkanol
Alkanone
Alkyne

Answer :A
Discussion
49.

Alkaline earth metals belong to the

Answer»

s-block in PERIODIC table
p-block in periodic table
d-block in periodic table
f-block in periodic table

SOLUTION :It is a s-block ELEMENT.
Discussion
50.

Alkaline earth metals are not found free in nature because of their:

Answer»

Their HIGH B. pt.
Their llow b. pt.
Thermal instability
Their GREAT CHEMICAL activity

Answer :D
Discussion