ECAT Pre Engineering Chemistry Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 16 The Halogens and The Noble Gases

Try The MCQ's Test For ECAT Chemistry Chapter 16 The Halogens and The Noble Gases

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ECAT Chemistry Chapter 16 The Halogens and The Noble Gases

00:00
Question # 1

Colour of bromine is

Question # 2

Which is used in bacterial lamps

Question # 3

Bleaching powder is agent:

Question # 4

The most reactive elements are

Question # 5

Oxidation state of fluorine is:

Question # 6

Which compound of noble gas xenon can be prepared?

Question # 7

Colour of fluorine gas is

Question # 8

The strongest hydrogen bond is in

Question # 9

Which halogen occurs naturally in a positive oxidation state?

Question # 10

Half life of most stable isotope of astatine is

Question # 11

Astatine belongs to group

Question # 12

Bleaching powder may be produced by passing chlorine over

Question # 13

Chlorine heptoxide (Cl2O7) reacts with water to form

Question # 14

The noble gases are

Question # 15

Which is used as cooling medium in nuclear reactors?

Question # 16

Molecule of halogens exist as

Question # 17

Noble gases are placed in group

Question # 18

An element that has a high ionization energy and tends to be chemically inactive would most likely to be

Question # 19

Non sticking coating in cooking utensils is done by

Question # 20

Which of the following represents the correct electronic configuration of the outermost energy level of an element of zero (VIIA) group in the ground state?

Question # 21

Which noble gas is used in mixture used for breathing by divers?

Question # 22

The strongest acid is

Question # 23

Halogens are called

Question # 24

The most reactive elements are:

Question # 25

Half life period of astatine is

Question # 26

A property which differs fluorine from the other halogens?

Question # 27

Nobel gases are placed group:

Question # 28

Oxidation state of fluorine is

Question # 29

Bleaching powder is prepared by the reaction of Cl2 with.

Question # 30

Which is present as a result of radioactive decay on earth?

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ECAT Chemistry Chapter 16 Important MCQ's

Sr.# Question Answer
1 The available chlorine is bleaching power is
A. 25-30%
B. 30-35%
C. 35-40%
D. 40-45%
2 Which of the following hydrogen halide is the weakest acid in solution
A. HF
B. HBr
C. HI
D. HCl
3 Which of the following hydrogen halide is the weakest acid in solution?
A. HF
B. HBr
C. Hl
D. HCl
4 Chlorin heptoxide reacts with water to form:
A. Hypochlorous acid
B. Chloric acid
C. Perchloric acid
D. Chlorine and oxygen
5 Gaseous HF exists in the form of
A. Monomers
B. Cyclic hexamers
C. As single entity
D. Both a and b
6 Used in tooth pastes is
A. Fluorides
B. Iodides
C. halides
D. nitrides
7 The most reactive elements are:
A. Group IV-A
B. Group V-A
C. Group VI-A
D. Group VII -A
8 I2O5is used for quantitative study of
A. CO2
B. NO2
C. NO
D. CO
9 Which halogen occurs naturally in a positive oxidation state?
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
10 Radioactive element in halogens is
A. Astatine
B. bromine
C. Iodine
D. Fluorine

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