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.

Chlorine is manufactured by

Answer»

Birkland and EYDE's process
Deacon's process
Bosch's process
Solvay's process

Answer :B
2.

Chlorine is in +1 oxidation state in

Answer»

`HCl`
`HClO_(4)`
`ICl`
`Cl_(2)O`

SOLUTION :In case of `Cl_(2)O` chlorine SHOWS +1 OXIDATION state.
3.

Chlorine is formed when dil HCl is treated with

Answer»

`KMnO_4`
`MnO_2`
`K_2Cr_2O_7`
All of these

SOLUTION :PREPARATION of `Cl_2.` Dil . HCL REACTS with `KMnO_4,MnO_2, K_2Cr_2O_7` to liberate `Cl_2`
4.

Chlorine is a ……………gas.

Answer»

SOLUTION :GREEN YELLOW
5.

Chlorine in vinyl chloride is less reactive because

Answer»

`sp^(2)`-hybridised carbon has more acidic character than `sp^(3)`-hybridised carbon
C-Cl bond develops PARTIAL double bond character
of rasonance
All are correct

Solution :`CH_(2)=CH-Cl^(-) HARR CH_(2)-CH-Cl^(+)` is formed between C and Cl. Here it is less reactive DUE to resonance.
6.

Chlorine has two isotopes of atomic mass units 34.97 and 36.97. The relative abundances of these two isotopes are 0.755 and 0.245 respectively. Find the average atomic mass of chlorine.

Answer»

SOLUTION :AVERAGE ATOMIC MASS `=34.97xx0.755+36.97xx0.245=35.46`
7.

Chlorine has +1 oxidation state in :

Answer»

HCI
`HCIO_3`
`CI_2O`
`ICI_3`

ANSWER :C
8.

Chlorinegas reacts with red hot calcium oxide to give

Answer»

bleaching POWDER and dichlorine monoxide
bleaching powder and water
calcium CHLORIDE and CHLORINE DIOXIDE
calcium chloride and oxygen.

Solution :`underset("RED hot")(2CaO) + 2Cl_2 to CaCl_2 + O_2 uarr`.
9.

Chlorine gas reacts with red hot calcium oxide to give

Answer»

Bleaching powder and dichlorine monoxide
Bleaching powder and water
Calcium CHLORIDE and CHLORINE dioxide
Calcium chloride and oxygen

SOLUTION :`2CaO +2Cl_2 to CaCl_(2) + O_(2) UARR`
10.

Chlorine gas is prepared commercially by

Answer»

electrolysis of CARBON tetrachloride
OXIDATION of CHLORIDE ions with `F_2(g)`
electrolysis of NaCl (aq)
oxidation of chloride ions with `Br_2`(aq)

Answer :C
11.

Chlorine gas is passed into a solution containing KF, Kl and KBr and CHCl_3 is added. The initial colour in CHCl_3 layer is

Answer»

Violet DUE to FORMATION of `I_2`
Orange due to formation of `Br_2`
Colourless due to formation of `F_2`
No colour CHANGE due to no reaction

ANSWER :A
12.

write the balanced equationwhen Chlorine gas is passed into a solution of NaI in water.

Answer»

SOLUTION :`NACL`is FORMED.
13.

Chlorine gas is passed into a solution containig KF, KL and KBr and KBr and CHCI_3 is added . The intial colour in CHCI_3 layer is :

Answer»

VIOLET due to frommation of `I_2`
Orange due to FORMATION of `Br_2`
Colorless due to formation of `F_2`
No colour CHANGE due to no reaction

Answer :A
14.

Chlorine gas is dried over

Answer»

QUICK lime
caustic soda
caustic POTASH sticks
conc. Sulphuric acid

Solution :`Cl_(2)^(-)`GAS ARRIVED over conc `H_(2)SO_(4)`
15.

Chlorine gas can be dried by passing over:

Answer»

Quicklime
Soda lime
Caustic POTASH sticks
Concentrated SULPHURIC acid

Answer :D
16.

Chlorine gas is liberated by the action of:

Answer»

SULPHURIC acid on SODIUM chloride
Hydrochloric acid on potassium sulphate
Hydrochloric acid on `KMnO_4`
NITRIC acid on KCl

Answer :C
17.

Chlorine gas can be dried by passing over

Answer»

quice lime
soda lime
caustic POTASH sticsk
concentrated sulhuric acid

Solution :Chlorine gas can be DRIED by passing over quice lime
18.

Chlorine forms many oxides. The maximum oxidation state of chlorine in it's oxide is "____________".

Answer»


SOLUTION :Chlorine FORMS to 4 TYPES of oxi-acids . (Hox, `HxO_(2), HxO_(3), HxO_(4))` MAXIMUM oxidation of chlorine in its oxide is 7 `( HClO_(4))`
19.

Chlorine element has +7 oxidation state in.......and + 1 in.......

Answer»

SOLUTION :`HClO_4,CIF`
20.

Chlorine does not react with:

Answer»

METHANAL
`CH_3CHO`
PROPANONE
`C_6H_5CHO`

ANSWER :A
21.

Chlorine dissolves in water in absence of sunlight and atordinary temperatures to form compoundsA and B. The compound B decomposes on exposure to sunlight to give compound A and nascent oxygen. The compounds A and B are __________ respectively.

Answer»

`HCL` and `HOCl`
`H_(2)O_(2) "and" HOCl`
`HCl` and `Cl_(2)O`
`ClO_(2)` and `HCl`

ANSWER :A
22.

Chlorine dioxide is best prepared by passing by

Answer»

chlorine GAS over hot HgO
Chlorine and oxygen gas over HOG pt CATALYST
hydrogen CHLORIDE and oxygen over silver oxide
chlorine over hot silver chlorate

Answer :D
23.

Chlorine cannot displace :

Answer»

FLUORINE from NaF
Iodine from Nal
Bromine from NaBr
None

Answer :A
24.

Chlorine cannot be used

Answer»

As bleaching agent
In sterilization
In PREPARATION of ANTISEPTIC
For extraciton of SILVER and copper

ANSWER :D
25.

Chlorine cannot be used :

Answer»

as a BLEACHING agent.
in STERILISATION
in PREPARATION of antiseptic
for EXTRACTION of COPPER and silver.

Answer :D
26.

Chlorine can remove hydrogen from hydrocarbons. This is due to its________.

Answer»

BLEACHING action
reducing property
very HIGH AFFINITY for hydrogen
gaseous state

Answer :C
27.

Chlorine can exist with oxidation state ranging from-1 " to " + 7 . In which of the ions chlorine will not undergo disproportionationn?

Answer»

`CLO^(-)`
`ClO_(4)^(-)`
`ClO_(3)^(-)`
`CL^(-)`

SOLUTION :N/A
28.

Chlorine can exhibit -1 and +1 states, while fluorine can exhibit only -1, but not +1. Why?

Answer»

Solution :General valency of HALOGENS is one . When chlorine (or bromine or iodine) is MONO -valent , with more electronegative ELEMENTS , it exhibits +1 state.
Fluorine can NEVER exhibit positive oxidation state as it the most electronegative ELECMENT.
29.

Chlorine can be used :

Answer»

As BLEACHING agent
In sterilisation
In preparation of antiseptic
For EXTRACTION of Ag and Cu

Solution :`Cl_(2)^(-)` used as bleaching agent & in sterilization.
30.

Chlorine can be prepared by reacting HCL with MnO_(2). The reaction is represented by the equation. MnO_(2)(s)+4HCl(aq)rarrCl_(2)(g)+MnCl_(2)(aq)+2H_(2)O(l) Assuming that the reaction goes to completion, what mass of conc. HCl solution (36%HCl by mass) is needed to produce 2.5g Cl_(2)?

Answer»

5.15g
14.3g
19.4g
26.4g

Answer :B
31.

Chlorine, bromine and iodine form oxides in which the oxidation states of these halogens range from ___________

Answer»

SOLUTION :`+1 " to " + 7`
32.

Chlorine bromine and iodine are placed inthe same group (17) of the periodic table because

Answer»

They are non-metals
they are electronegative
They have SEVEN ELECTRONS in the outermost shells of the atoms
They are generally univalent

Answer :C
33.

Chlorine bleaches only in the

Answer»

ABSENCE of acid
Presence of alkali
Absence of moisture
Presence of moisture

Answer :D
34.

Chlorine atom, ini its third excited state, react with fluorine to form compound X. the formula and shape of X are

Answer»

`ClF_(5)`, Pentagonal
`ClF_(4)` , TETRAHEDRAL
`ClF_(4)`, Pentagonal bipyramidal
`ClF_(7)` Pentagonal bipyramidal

Answer :D
35.

Chlorine acts as bleaching agent in presence of

Answer»

dry AIR
moisture
sunlight
PURE oxygen

ANSWER :B
36.

Chlorine acts as a bleaching agent only in presence of

Answer»

Sun-light
Dry air
Pure oxygen
Moisture

Answer :D
37.

Chlorine acts as a bleaching agent only in the presence of moisture - explain.

Answer»

Dry AIR
Moisture
Sun light
None of these

Answer :B
38.

Chlorine acts as a bleaching agent only in the presence of

Answer»

DRY air
MOISTURE
Sun LIGHT
NONE of these

Answer :B
39.

Chlorination of toluene in the presence of sunlight gives :

Answer»

Chlorobenzene
o- and p-Chlorotoluene
BENZYL chloride
m-Chlorotoluene

SOLUTION :
40.

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives …………………. .

Answer»

O - CRESOL
P - cresol
PHLOROGLUCINOL
Benzyl ALCOHOL

SOLUTION :Benzyl alcohol
41.

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives

Answer»

o-Cresol
p-Cresol
2,4-Dihydroxytoluene
Benzoic acid

Solution :
42.

Chlorinationof toluene in presence of lightand heatfollowed bytreatmentwith aqueous NaOH gives.

Answer»

O-CRESOL
p- cresol
2,4-dihdroxy TOLUENE
BENZOICACID

SOLUTION :
43.

Chlorination of toluene in presence of light and heat followed by treatment with aqueous NaOH gives:

Answer»

o-Cresol
p-Cresol
2,4-Dihydroxytoluene
Benzoic acid

Answer :D
44.

Chlorination of toluene in preence of light and heat followed by treatement with aqueous NaOH gives.

Answer»

o-cresol
p-cresol
Mixture of o- cresol and p-cresol
Benzoic acid

Solution :`C_(6)H_(5)CH_(3)overset(3Cl_(2)HV, Delta)underset(-3HCl)RARR C_(6)H_(5)C Cl_(3)overset(aq. NaOH)underset(-3NaCl)rarr C_(6)H_(5)(OH)_(3)underset(-H_(2)O)rarr underset("Benzoic acid")(C_(6)H_(5)COOH)`
45.

Chlorination of toluence in the presence of light and heat followed by treatment with aqueous NaOH gives

Answer»

BENZOIC ACID
p-cresol
2,4-dihydroxytoluene
o-cresol

Answer :A
46.

Chlorinationof nitrmethane gives

Answer»

`CH_(3)-CL`
`Cl_(3) C-NO_(2)`
`Cl_(2)CH_(2)`
`C Cl_(4)`

ANSWER :B
47.

Chlorination of tert-butylbenzene gives substantial amount of o- substituted product while its bromination gives nearly negligible amount of the product. Which of the following does not relate to the above reaction

Answer»

The benzenonium ion formed in the first CASE is more STABLE than in the second case.
It is difficult to PRODUCE `Br^(+)` ion than `CI^(+) ion.
Difference in size of the electrophile.
Chlorine is more REACTIVE than bromine

Answer :(A), (B) and (D)
48.

Chlorination of methane proceeds by:

Answer»

electrophilic SUBSTITUTION
free RADICAL mechanism
nucleophilic substitution
NONE of these

ANSWER :C
49.

chlorination of ethane is carriedout in the presence of

Answer»

ANHYDROUS`AIBr_(3)`
mercuric chloride `ultraviolet light
zinc
chloride

Solution :Chlorination of ethane is carried out in the presence of ultravioledt light resultingfreeradical REACTION forming ethyl chloirde
`C_(2)H_(6) overset(CI_(2))underset(hv)RARR C_(2)H_(5)CI`
50.

Chlorination of ethane is carried out in presence of ..........

Answer»

ANHYDROUS `AlBr_3`
`HgCl_2`
`ZnCl_2`
ULTRA VIOLET light

Answer :D