Question # 1

Chlorin heptoxide reacts with water to form:

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Oxidation state of fluorine is:

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+1

+2

-1

-2

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

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Cl₂

NH₃

CO₂

He

Which is used in arc welding and cutting?

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He

Ne

Ar

Kr

Bleaching powder is agent:

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Dehydrating

Oxidazing

reducing

all

Colour of chlorine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

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?

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s²p²

s²p⁴

s²p⁵

s²p⁶

Halogens are called.

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salt former

Light bearing

copper forming

None of these

Hydrogen bond is the strongest between the molecules of:

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HF

HCl

HBr

Hl

Which is used as cooling medium in nuclear reactors?

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He

Ne

Ar

Kr

Gaseous HF exists in the form of

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Monomers

Cyclic hexamers

As single entity

Both a and b

Non sticking coating in cooking utensils is done by

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Iron

Cooper

Plastic

Teflon

Radioactive element in halogens is

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Astatine

bromine

Iodine

Fluorine

Molecule of halogens exist as

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Monatomic

Diatomic

Triatomi

Polyatomic

Which has complete valence shell?

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C

N

O

Ne

Noble gases in the atmosphere are

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4%

3%

2%

1%

Astatine belongs to group

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I-A

II-A

III-A

VII-A

The only non-metal in liquid form is

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S

Cl

Br

P

Smell of halogens is:

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Fruity

Sweet

Irritating

Rotten egg

Oxidation state of fluorine is

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+1

+2

-1

-2

The strongest acid is

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HF

HCl

HBr

HI

Angle is OF₂is

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120⁰

180⁰

105⁰

102⁰

Colour of Iodine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

Which halogen has Iustrous shining?

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F₂

Cl₂

Br₂

I₂

Colour of fluorine gas is

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Pale yellow

Greenish yellow

Red brown

greyish black

Half life of most stable isotope of astatine is

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8.0 hrs

8.1 hrs

8.2 hrs

8.3 hrs

The most reactive elements are

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Group IV-A

Group V-A

Group VI-A

Group VII-A

Hydrogen bond is the strongest between the molecules of

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HF

HCl

HBr

HI

Halogens are called

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Salt former

Light bearing

Copper forming

none of these

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

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He

Ne

Ar

Kr

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ECAT Chemistry Chapter 16 The Halogens and The Noble Gases Online Test MCQs With Answers

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