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.

Chlorobenzene on treatment with acetyl chloride and anhydrous AlCl_3 the major product formed will be

Answer»

o-Chloroacetophenone
p-Chloroacetophenone
o and p-Chloroacetophenone
m-Chloroacetophenone

Answer :B
2.

Chlorobenzene on reduction with Na/Al alloy and alcohol gives :

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TOLUENE
Benzene
Benzoic ACID
CHLOROTOLUENE

SOLUTION :
3.

Chlorobenzene on reaction with CH_(3)Cl in the presence of anhy. AlCl_(3) will give

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TOLUENE
m-Chlorotoluene
p-Chlorotoluene
A MIXTURE of o-and p-chlorotoluene

Solution :`-CL` is ortho, para DIRECTING group (Friedel craft alkylation).
4.

Chlorobenzene on heating with NaOH at350^(@) Cunderpressure gives

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PHENOL
sodium phenoxide
BENZALDEHYDE
BENZYL ALCOHOL

Answer :B
5.

Chlorobenzene on reaction with CH_3Cl in the presence of AlCl_3 will give

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<P>TOLUENE
m - CHLORO toluene
p - Chloro toluene
A MIXTURE of o - and p - chlorotoluene

Answer :D
6.

Chlorobenzene on heating with aqueous NH_(3) under pressure in the presence of cuprous chloride gives

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Benzamide
Nitrobenzene
Aniline
Chloroaminobenzene

Solution :DOW's PROCESS.
7.

Chlorobenzene on fusing with solid NaOH gives

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benzene
benzoic acid
phenol
benzyl CHLORIDE

ANSWER :C
8.

Chlorobenzene on fusing with solid NaOH follwed by acidification gives

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Benzene
BENZOIC ACID
PHENOL
Benzene Chloride

Answer :C
9.

Chlorobenzene is o,p-directing in electrophilic substitution reaction. The directing influence is explained by

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`+M` of PH
`I` of CL
`+M` of Cl
`+I` of Ph

Solution :Cl EXHIBITS - I EFFECT and + effect
10.

Chlorobenzene is less reactive than that of alkyl chlorides towards nucleophilic substitution reactions . How can the reactivity of chlorine in chlorobenzene be increased ?

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SOLUTION :By indroducing electron withdrawing GROUPS such as nitrogroup at the ortho and PARA POSITIONS in chlorobenzene
11.

Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl_(3). Which of the following species attacks the benzene ring in this reaction ?

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`Cl^(-)`
`Cl^(+)`
`AlCl_(3)`
`[AlCl_(4)]^(-)`

SOLUTION :`Cl^(+)` is an ELECTROPHILE that attacks on electron rich benzene ring.
12.

Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl_(3). Which of the following species attacks the benzene ring in the reaction?

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`CL^(-)`
`Cl^(+)`
`AlCl_(3)`
`[AlCl_(4)]^(-)`

ANSWER :B
13.

Chlorobenzene does not give SN^(1) reaction, because of

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chlorine is attached to sp hybridized CARBON atom.
chlorine is attached to `sp^(3)` hybridized carbon
resonance stabilization of BENZENE produces
self ionization of chloro benzene produces PHENYL CATION, which is not stabilized by resonance.

Answer :D
14.

Chlorobenzene is

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More REACTIVE than ethyl bromide
More reactive than isopropyl CHLORIDE
As reactive as methyl chloride
LESS reactive than BENZYL chloride

ANSWER :D
15.

Chlorobenzene can be prepared by reacting aniline with :

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Zn and HCl
Cuprous chloride
CHLORINE in the PRESENCE of anhydrous `AlCl_(3)`
Nitrous acid followed by HEATING with cuprous chloride and HCl

Solution :
16.

Chlorobenzene and sodium react in dry ether medium to form_____.

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SOLUTION :BIPHENYL
17.

How is chlorobenzene prepared from aniline? How is chlorobenzene converted into disphenyl?

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SOLUTION : ANILINE to CHLOROBENZENE :

(2)
18.

Chlorobenzene can be prepared by reacting aniline with

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Nitrous acid followed by HEATING with cuprous chloride and HCl
Cuprous chloride
CHLORINE in presence of anhydrous aluminium chloride
HYDROCHLORIC acid

ANSWER :A
19.

Chloroamphenicol is used in the treatment of which of the following

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Typhoid
Pneumonia
Headache and fever
Bronchitis

Solution :It is broad spectrum antibiotic. It is EFFECTIVE against certain gram-positive and gram-negative bacteria and some rickettsiae and VIRUSES. It is very effective in the treatment of typhoid fever, meningitis, pneumonia, WHOOPING COUGH.
20.

Chloroamphenicol is an

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ANTIFERTILITY drug
antibiotic BROAD spectrum
antiseptic and disinfectant
antihistamine

ANSWER :B
21.

Chloroacetic acid si a stronger acid than acetic acid due to____of the chlorine ato.

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SOLUTION :`-I`-EFFECT.
22.

Chloroamphenicol is

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Broad spectrum antibacterial
Broad spectrum analgesic
Broad spectrum antibiotic
Narrow spectrum antibiotic

Solution :Broad spectrum antibiotics are the anitbiotic which are EFFECTIVE against several type of harmful micro-organisms. Tetracycline, chloromycetin and chloramphenicol are the common examples of broad spectrum antibiotics. Chloramphenicol is rapidly absorbed from the gastro-intestinal tract and HENCE can be given orally. These can be used for CURING typhoid, acute fever, dysentery, WHOOPING COUGH, etc.
23.

Chloramphenicol is an :

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ANTIFERTILITY drug
antihistaminic
ANTISEPTIC and disinfectant
ANTIBIOTIC-broad spectrum

Solution :CHLOROAMPHENICOL is a broadspectrum antibiotic .
24.

Chloroacetic acid has K_(a) = 1.36 xx 10^(-3). Calculate the concentration of each ion and freezing point of 0.1 M its solution, assuming molarity and malality same.(K_(f) "for"H_(2)O = 1.86 K "molality"^(-1))

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ANSWER :`0.207^(@)C`
25.

Chloro acetic acid is stronger acid than acetic acid . Explain .

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SOLUTION :Carbon ATOM of -`CH_2Cl` group acquires partial positive charge which SPREADS to oxygen of CHLORO acetate ion, when `H^(+)` is released.
So the negative charge of this oxygen is stabilised and anion becomes a weak base.
Correspondingly the acid becomes a strong acid.
26.

Chloroacetic acid is a stronger acid than acetic acid. This can be explained using

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`-M` effect
`-I`effect
`+M`effect
`+I`effect

Solution :`ClCH_(2)COOH` is more acidic than ACETIC acid due to the `-I` effect of `CL^(-)`.
27.

Chlorine water on standing loses its yellow colour due to the formation of ____________and _________

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SOLUTION :`HCL, HOCL`
28.

Chlorine water on standing loses its colour and forms ........

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HCl only
HOCL and `HOCl_(2)`
HCl and HOCl
HCl and `HClO_(2)`

Solution :`Cl_(2) + H_(2)O to HCl + HOCl`
29.

Chlorine water on cooling deposits greenish-yellow crystals of:

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`Cl_2. 2H_2O`
`Cl_2. H_2O`
`Cl_2. 3H_2O`
`Cl_2. 8H_2O`

ANSWER :D
30.

Chlorine water on cooling deposites greenish-yellow crystals of Cl_(2). XH_(2)O. What is the value of X.

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Solution :CHLORINE water on colling deposits greenish- YELOW CRYSTALS of `Cl_(2). xH_(20O ` is `Cl_(2) .8H_(2)O`
31.

Chlorine was discovered by:

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Priestley
Davy
Sheele
Cavendish

Answer :C
32.

Chlorine trioxide is paramagnetic, but chlorine hexoxide is diamagnetic. Explain.

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Solution :CHLORINE trioxide , `ClO_(3)` has unpaired electron . HENCE it is paramagnetic . UPON dimerisation , chlorine hexoxide is formed .
`Cl_(2)O_(6)` has all PAIRED electrons . Therefore it is diamagnetic .
33.

Chlorine reacts with sodium hydroxide under various condition to give

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Sodium chloride
sodium hypochlorite
sodium chlorate
all of these

Solution :`UNDERSET("(dil)")(2NaOH) +Cl_(2) OVERSET("Cold")to NACL + underset("Sod . Hypochlorite")(NaClO +H_(2)O)`
`underset("(Conc.)")(6NaOH) +3Cl_(2) overset("heat")to5NaCl + underset("Sodium chlorate")(NaClO_(3) +3 H_(2)O)`
34.

Chlorine shows bleaching action in :

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dry CONDITION
PRESENCE of HCl only
moist condition
NONE of the above.

Answer :C
35.

Chlorine reacts with nitric oxide to form

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`NOCl_(2)`
`NOCL`
`NO_(2)Cl_(2)`
`NO_(2)CL`

ANSWER :B
36.

Chlorine reacts with excess NH_3 to give

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`NCl_3`
HCI
`N_2`
`N_2 + NH_4Cl`

SOLUTION :`UNDERSET"EXCESS"(8NH_3) + 3Cl_2 to N_2 + 6NH_4Cl`
37.

Chlorine reacts with hot and cone. NaOH and produces compounds X and Y. Compound X gives a white precipitate with AgNO_(3)soln. The average bond order between CI and O atoms in Y is?

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Solution :
Bond ORDER=`("TOTAL NUMBER of BONDS")/("Total resonating structures") = 5/3 = 1.67`
38.

Chlorine reacts with ethanol to give:

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ETHYL CHLORIDE
CHLOROFORM
ACETALDEHYDE
Chloral

Answer :4
39.

Chlorine reacts with ethanol to give :

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ETHYL chloride
Chloroform
Acetaldehyde
Chloral

Answer :D
40.

Chlorine reacts with cold, dil. Sodium hydroxide under various conditions to give:

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SODIUM CHLORIDE and sodium hypochlorite
Sodium chlorate
Sodium chlorite
All

Answer :A
41.

Chlorine reacts with benzadehyde to give

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CHLOROBENZENE
BENZAL CHLORIDE
BENZOYL chloride
Benzyl chloride

Answer :C
42.

Chlorine oxidises H_2 S to

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S
`SO_(2)`
`H_(2)SO_(4)`
`H_(2)SO_(3)`

ANSWER :A
43.

Chlorine is used in water for

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Killing GERMS
Prevention of pollution
Cleansing
Removing dirt

Solution :`Cl_2` in very MINUTE QUANTITY is used to KILL germs in water.
44.

Chlorine is soluble in water and its solution is refered as ………….. .

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SOLUTION :CHLORINE WATER
45.

Chlorine is prepared in the laboratory by treating manganese dioxide (MnO_(2)) with aqueous hydrochloric acid according to the reaction. 4HCl(aq)+MnO_(2)(s) rarr 2H_(2)O(l)+MnCl_(2)(aq)+Cl_(2)(g) How many grams of HCl react with 5.0 g of manganese dioxide ? (Atomic mass of Mn = 55 u)

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Solution :1 mole of `MnO_(2)`, i.e, `55+32=87g MnO_(2)` REACT with 4 MOLES of HCl, i.e., `4xx36.5g=146g` of HCl.
`therefore "5.0 G of MnO"_(2)" will react with HCl"=(146)/(87)xx5.0 g=8.40g`
46.

Chlorine is passed through boiling toluene, how many chloro derivatives would you get

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SOLUTION :BENZYL CHLORIDE, BENZAL dischloride and BENZOTRICHLORIDE.
47.

Chlorine is passed into dilute, cold KOH solution. What are the oxidation numbers of chlorine in the products formed ?

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`-1and+5`
`-1and+3`
`+1and+7`
`+1and-1`

ANSWER :D
48.

Chlorine gas is not produced by heating:

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ELECTROLYSIS of aqueous solution of NaCl
action of CONC. HCl on `MnO_(2)`
evaporation of sea water
action of conc. `H_(2)SO_(4)` on NaCl in the presence of `MnO_(2)`.

Answer :C
49.

Chlorine is most reactive towards NaOH in :

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`CH_3Cl`
`CH_2` = CHCL
`C_6H_5Cl`
`C_6H_5CH_2Cl`

ANSWER :D
50.

Chlorine is mixed with drinking water so that:

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BACTERIA are killed
Dirt is removed
Water is cleaned
Suspension is removed

Answer :A