Question # 1

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 halogen is

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Fruity

Sweet

Irritating

Rotten egg

Which is used in arc welding and cutting?

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He

Ne

Ar

Kr

Which is volatile liquid?

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HF

HCl

HBr

Hl

Which has the least oxidizing power?

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F₂

Cl₂

Br₂

I₂

Which is used as cooling medium in nuclear reactors?

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He

Ne

Ar

Kr

Used in tooth pastes is

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Fluorides

Iodides

halides

nitrides

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

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He

Ne

Ar

Kr

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

Which compound of noble gas xenon can be prepared?

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Oxides

Fluoride

Oxyfluorides

All of these

Halogens are called.

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salt former

Light bearing

copper forming

None of these

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

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Cl₂

NH₃

CO₂

He

Gaseous HF exists in the form of

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Monomers

Cyclic hexamers

As single entity

Both a and b

Halogens are called

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Salt former

Light bearing

Copper forming

none of these

The most reactive elements are:

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Group IV-A

Group V-A

Group VI-A

Group VII -A

Astatine belongs to group:

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I-A

II-A

III-A

VII-A

Hydrogen bond is the strongest between the molecules of:

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HF

HCl

HBr

Hl

Colour of fluorine gas is

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Pale yellow

Greenish yellow

Red brown

greyish black

The most reactive elements are

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Group IV-A

Group V-A

Group VI-A

Group VII-A

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

Nobel gases are placed group:

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Group IV-A

Group V-A

Group VI-A

Group VII-A

Which has complete valence shell?

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C

N

O

Ne

Non sticking coating in cooking utensils is done by

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Iron

Cooper

Plastic

Teflon

Which is the strongest acid?

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HClO

HClO₂

HClO₃

HClO₄

Corrosion proof parts of machinery are prepared from

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Iron

Copper

Plastic

Teflon

Chlorine heptoxide (Cl2O7) reacts with water to form

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Hypochlorous acid

chloric acid

Perchloric acid

Chlorine and Oxygen

Smell of halogens is:

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Fruity

Sweet

Irritating

Rotten egg

Which is used in bacterial lamps

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He

Ne

Ar

Kr

Colour of Iodine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

Perchloric acid can be stored in solution form

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47%

57%

67%

77%

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

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Br2

F2

I2

Cl2

The available chlorine is bleaching power is

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25-30%

30-35%

35-40%

40-45%

The strongest acid is

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HF

HCl

HBr

HI

The compound with cyclic hexamer is

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HF

HCl

HBr

HI

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

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