Question # 1

Bleaching powder is prepared by the reaction of Cl₂with.

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Lime stone

Lime water

slaked lime

Lime

The strongest hydrogen bond is in

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HF

HCl

HBr

Hl

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

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

I₂O₅is used for quantitative study of

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CO₂

NO₂

NO

CO

Colour of bromine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

Colour of Iodine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

Which halogen occurs naturally in a positive oxidation state?

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Fluorine

Chlorine

Bromine

Iodine

Hydrogen bond is the strongest between the molecules of

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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

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

Smell of halogens is:

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Fruity

Sweet

Irritating

Rotten egg

Colour of fluorine gas is

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Pale yellow

Greenish yellow

Red brown

greyish black

Chlorin heptoxide reacts with water to form:

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

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

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Br2

F2

I2

Cl2

Which halogen has Iustrous shining?

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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

HI

HCl

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 noble gases are

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Mono atomio

Diatomic

Polyatomic

All

Which is used as cooling medium in nuclear reactors?

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He

Ne

Ar

Kr

Hydrogen bond is the strongest between the molecules of:

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HF

HCl

HBr

Hl

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

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Cl₂

NH₃

CO₂

He

The strongest acid is

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HF

HCl

HBr

HI

Which is volatile liquid?

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HF

HCl

HBr

Hl

Which is the strongest acid?

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HClO

HClO₂

HClO₃

HClO₄

Bleaching powder is agent:

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Dehydrating

Oxidazing

reducing

all

Noble gases in the atmosphere are

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4%

3%

2%

1%

Colour of chlorine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

Astatine belongs to group

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I-A

II-A

III-A

VII-A

Gaseous HF exists in the form of

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Monomers

Cyclic hexamers

As single entity

Both a and b

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

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