Question # 1

Which is used in bacterial lamps

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He

Ne

Ar

Kr

Which halogen occurs naturally in a positive oxidation state?

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Fluorine

Chlorine

Bromine

Iodine

Astatine belongs to group

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I-A

II-A

III-A

VII-A

Second most element in the universe is

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He

Ne

Ar

Kr

Smell of halogen is

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Fruity

Sweet

Irritating

Rotten egg

The most reactive elements are:

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Group IV-A

Group V-A

Group VI-A

Group VII -A

Colour of fluorine gas is

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Pale yellow

Greenish yellow

Red brown

greyish black

The compound with cyclic hexamer is

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HF

HCl

HBr

HI

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

Which has the least oxidizing power?

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F₂

Cl₂

Br₂

I₂

The available chlorine is bleaching power is

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25-30%

30-35%

35-40%

40-45%

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

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F₂

Cl₂

Br₂

I₂

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

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HF

HBr

Hl

HCl

Chlorine heptoxide (Cl2O7) reacts with water to form

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Hypochlorous acid

chloric acid

Perchloric acid

Chlorine and Oxygen

Half life period of astatine is

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8.1 hrs

8.2 Hrs

8.3 hrs

8.4 hrs

Hydrogen bond is the strongest between the molecules of:

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HF

HCl

HBr

Hl

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

HI

Halogens are called.

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salt former

Light bearing

copper forming

None of these

The noble gases are

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Mono atomio

Diatomic

Polyatomic

All

Oxidation state of fluorine is:

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+1

+2

-1

-2

Used in tooth pastes is

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Fluorides

Iodides

halides

nitrides

Noble gases are placed in group

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Group IV-A

Group V-A

Group VI-A

Group VII-A

Angle is OF₂is

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120⁰

180⁰

105⁰

102⁰

Which is volatile liquid?

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HF

HCl

HBr

Hl

The strongest acid is

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HF

HCl

HBr

HI

A property which differs fluorine from the other halogens?

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Direct combination with inert gases

Uninegative

Diatomic

ns² , np⁵

Which compound of noble gas xenon can be prepared?

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Oxides

Fluoride

Oxyfluorides

All of these

Perchloric acid can be stored in solution form

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47%

57%

67%

77%

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

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Cl₂

NH₃

CO₂

He

The only non-metal in liquid form is

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S

Cl

Br

P

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

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HF

HBr

HI

HCl

Gaseous HF exists in the form of

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Monomers

Cyclic hexames

As single entity

Both (a) and (b)

Which halogen has Iustrous shining?

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F₂

Cl₂

Br₂

I₂

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

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an alkali metal

a transition element

a noble gas

a halogen

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

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