JOIN ADRE 2.0 Telegram Group

Class 12 Chemistry Chapter 7 p Block Elements MCQs | Multiple Choice Questions (MCQs) and Answers on Class 12 Chemistry Chapter 7 p Block Elements

Questions
1 The most efficient agent for the absorption of SO3 is
A 80% H2SO4
B 98% H2SO4
C 50% H2SO4 
D 20% H2SO4

Answer:98% H2SO4
2 In presence of moisture , SO2 can
A Act as oxidant
B Lose electron
C Gain electron
D Not act as reductant

Answer:Lose electron
3 The correct order of thermal stability of hydrogen halide.
A HI > HBr > HCl > HI
B HF > HCl > HBr > HI
C HCI < HF < HBr < HI
D HI > HCl > HF > HBr

Answer: HF > HCl > HBr > HI
4 The solubility of iodine in water increases in presence of
A Alcohol
B Chloroform
C Sodium hydroxide
D Potassium trichloride

Answer:Potassium trichloride
5 On boiling an aqueous solution of KClO3 with iodine the following is obtained
A KClO3
B KClO4
C KClO2
D KIO3

Answer:KClO3
6 Colour of iodine is disappeared by shaking it with aqueous solution of
A H2SO4
B Na2S2O3
C Na2S
D Na2SO4

Answer:Na2S
7 The stability of interhalogen compound is in order

A IF3 > UF3 > BrF3 
B BrF3 > IF3 > ClF3
C IF3 > BrF3 > ClF33
D ClF3 > IF3 > BrF3

Answer:BrF3 > IF3 > ClF3
8 Bromine is obtained on commercial scale from
A Caliche
B Carnellite
C Common Salt
D Cryolite

Answer:Carnellite
9 Chlorine was discovered by
A Davy
B Priestley
C Ratherlford
D Sheele

Answer:Davy
10 Bromine is liberated when aqueous solution of potassium bromide is treated with
A Cl
B I2
C Dilute H2SO4
D SO2

Answer:Cl
11 Chlorine reacts under various conditions with sodium hydroxide to give
A Sodium Chloride
B Sodium hypochlorite
C Sodium chlorate
D All of these

Answer:All of these
12 Br2 gas turns starch iodide paper
A Blue
B Red
C Colourless
D Yellow

Answer: Blue
13 Which of following is weakest acid?
A HF
B HCl
C HBr
D HI

Answer: HF
14 Deacon’s process is used in manufacture of
A Bleaching powder
B Sulphonic acid
C Nitric acid
D Chlorine

Answer: Chlorine
15 Which of following is correct?
A Iodine is solid
B Chlorine is insoluble in water
C Iodine is more reactive than bromine
D Bromine is more reactive than chlorine

Answer:Iodine is solid
16 Sea water is employed as a source of manufacture of
A F
B I
C Br
D Cl

Answer: I
17 Which is most reactive halogen
A Cl2
B Br2
C I2
D F2

Answer: F2
18 Which of following represents clear electro positive properties
A F
B Cl
C Br
D I

Answer:I
19 Which of following represents outermost shell of halogens
A S2P3
B S2P6
C S2P4
D S2P5

Answer: S2P5
20 Most activeness of fluorine is due to
A F-F bond has less energy
B F2 is gas at normal temp
C Its e - affinity is max
D None of above

Answer:F-F bond has less energy

ADRE 2.0 FULL LENGTH MOCK TEST

Take Mock Tests

Missiles Mock Test Start Test!
SSC MTS Mock Test Start Test
IBPS CLERK MOCK TEST Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH) Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi) Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH) Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH) Start Test!
IB Security Assistant Mock test 1 (english) Start Test!
UP POLICE CONSTABLE MOCK TEST 1 Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI) Start Test!

Chapters

Advertisement
Assam Direct Recruitment Test Series