ECAT Pre Engineering Chemistry Chapter 16 MCQ Test With Answer

Question # 1

Colour of bromine is

Pale yellow A
Greenish yellow B
Red brown C
Greyish black D

Question # 2

A property which differs fluorine from the other halogens?

Direct combination with inert gases A
Uninegative B
Diatomic C
ns² , np⁵ D

Question # 3

Astatine belongs to group:

I-A A
II-A B
III-A C
VII-A D

Question # 4

The strongest acid is

HF A
HCl B
HBr C
HI D

Question # 5

Bleaching powder is agent:

Dehydrating A
Oxidazing B
reducing C
all D

Question # 6

Colour of Iodine is

Pale yellow A
Greenish yellow B
Red brown C
Greyish black D

Question # 7

Which compound of noble gas xenon can be prepared?

Oxides A
Fluoride B
Oxyfluorides C
All of these D

Question # 8

Which is used in arc welding and cutting?

He A
Ne B
Ar C
Kr D

Question # 9

Molecule of halogens exist as

Monatomic A
Diatomic B
Triatomi C
Polyatomic D

Question # 10

Which halogen occurs naturally in a positive oxidation state?

Fluorine A
Chlorine B
Bromine C
Iodine D

Question # 11

Smell of halogens is:

Fruity A
Sweet B
Irritating C
Rotten egg D

Question # 12

The most reactive elements are

Group IV-A A
Group V-A B
Group VI-A C
Group VII-A D

Question # 13

Hydrogen bond is the strongest between the molecules of

HF A
HCl B
HBr C
HI D

Question # 14

the anhydride of HCIO₄is

CIO₃ A
ClO₂ B
Cl₂O₅ C
Cl₂O₇ D

Question # 15

Which halogen has maximum Van-der Waal's forces?

F₂ A
Cl₂ B
Br₂ C
I₂ D

Question # 16

The compound with cyclic hexamer is

HF A
HCl B
HBr C
HI D

Question # 17

Angle is OF₂is

120⁰ A
180⁰ B
105⁰ C
102⁰ D

Question # 18

Which has complete valence shell?

C A
N B
O C
Ne D

Question # 19

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

an alkali metal A
a transition element B
a noble gas C
a halogen D

Question # 20

Noble gases in the atmosphere are

4% A
3% B
2% C
1% D

Question # 21

Halogens are called

Salt former A
Light bearing B
Copper forming C
none of these D

Question # 22

Which is volatile liquid?

HF A
HCl B
HBr C
Hl D

Question # 23

Which halogen will react spontaneously with Au(s)to produce Au3++

Br2 A
F2 B
I2 C
Cl2 D

Question # 24

Which of the following hydrogen halide is the weakest acid in solution

HF A
HBr B
HI C
HCl D

Question # 25

Bleaching powder may be produced by passing chlorine over

Calcium carbonate A
Hydrated calcium sulphate B
Anhydrous calcium sulphate C
Calcium hydroxide D

Question # 26

Which is the strongest acid?

HClO A
HClO₂ B
HClO₃ C
HClO₄ D

Question # 27

The available chlorine is bleaching power is

25-30% A
30-35% B
35-40% C
40-45% D

Question # 28

Halogens are called.

salt former A
Light bearing B
copper forming C
None of these D

Question # 29

Nobel gases are placed group:

Group IV-A A
Group V-A B
Group VI-A C
Group VII-A D

Question # 30

Chlorine heptoxide (Cl2O7) reacts with water to form

Hypochlorous acid A
chloric acid B
Perchloric acid C
Chlorine and Oxygen D

Sr.#	Question	Answer
1	Bleaching powder may be produced by passing chlorine over	A. Calcium carbonate B. Hydrated calcium sulphate C. Anhydrous calcium sulphate D. Calcium hydroxide
2	Which halogen will react spontaneously with Au(s)to produce Au3++	A. Br2 B. F2 C. I2 D. Cl2
3	Hydrogen bond is the strongest between the molecules of	A. HF B. HCl C. HBr D. HI
4	Non sticking coating in cooking utensils is done by	A. Iron B. Cooper C. Plastic D. Teflon
5	Which is the strongest acid?	A. HClO B. HClO₂ C. HClO₃ D. HClO₄
6	A property which differs fluorine from the other halogens?	A. Direct combination with inert gases B. Uninegative C. Diatomic D. ns² , np⁵
7	The most reactive elements are	A. Group IV-A B. Group V-A C. Group VI-A D. Group VII-A
8	Halogens are called.	A. salt former B. Light bearing C. copper forming D. None of these
9	Which has the least oxidizing power?	A. F₂ B. Cl₂ C. Br₂ D. I₂
10	Astatine belongs to group	A. I-A B. II-A C. III-A D. VII-A

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