Question # 1

I₂O₅is used for quantitative study of

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CO₂

NO₂

NO

CO

Halogens are called

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Salt former

Light bearing

Copper forming

none of these

Halogens are called.

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salt former

Light bearing

copper forming

None of these

The compound with cyclic hexamer is

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HF

HCl

HBr

HI

Nobel gases are placed group:

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Group IV-A

Group V-A

Group VI-A

Group VII-A

Half life period of astatine is

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8.1 hrs

8.2 Hrs

8.3 hrs

8.4 hrs

Radioactive element in halogens is

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Astatine

bromine

Iodine

Fluorine

Colour of bromine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

Which is used in bacterial lamps

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He

Ne

Ar

Kr

Which compound of noble gas xenon can be prepared?

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Oxides

Fluoride

Oxyfluorides

All of these

Used in tooth pastes is

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Fluorides

Iodides

halides

nitrides

Which is volatile liquid?

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HF

HCl

HBr

Hl

Chlorin heptoxide reacts with water to form:

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

The most reactive elements are:

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Group IV-A

Group V-A

Group VI-A

Group VII -A

Chlorine heptoxide (Cl2O7) reacts with water to form

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Hypochlorous acid

chloric acid

Perchloric acid

Chlorine and Oxygen

Molecule of halogens exist as

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Monatomic

Diatomic

Triatomi

Polyatomic

Non sticking coating in cooking utensils is done by

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Iron

Cooper

Plastic

Teflon

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 has the least oxidizing power?

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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

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

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F₂

Cl₂

Br₂

I₂

Oxidation state of fluorine is

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+1

+2

-1

-2

Which halogen has Iustrous shining?

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F₂

Cl₂

Br₂

I₂

Perchloric acid can be stored in solution form

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47%

57%

67%

77%

Angle is OF₂is

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120⁰

180⁰

105⁰

102⁰

Astatine belongs to group:

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I-A

II-A

III-A

VII-A

The strongest hydrogen bond is in

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HF

HCl

HBr

Hl

Hydrogen bond is the strongest between the molecules of

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HF

HCl

HBr

HI

Gaseous HF exists in the form of

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Monomers

Cyclic hexamers

As single entity

Both a and b

Gaseous HF exists in the form of

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Monomers

Cyclic hexames

As single entity

Both (a) and (b)

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

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HF

HBr

Hl

HCl

Which is used in arc welding and cutting?

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He

Ne

Ar

Kr

The available chlorine is bleaching power is

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25-30%

30-35%

35-40%

40-45%

Which halogen occurs naturally in a positive oxidation state?

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Fluorine

Chlorine

Bromine

Iodine

Which has complete valence shell?

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C

N

O

Ne

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

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