Question # 1

the anhydride of HCIO₄is

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CIO₃

ClO₂

Cl₂O₅

Cl₂O₇

Chlorin heptoxide reacts with water to form:

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Colour of bromine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

Used in tooth pastes is

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Fluorides

Iodides

halides

nitrides

Oxidation state of fluorine is

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+1

+2

-1

-2

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

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

The noble gases are

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Mono atomio

Diatomic

Polyatomic

All

I₂O₅is used for quantitative study of

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CO₂

NO₂

NO

CO

Second most element in the universe is

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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

Colour of chlorine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

Which compound of noble gas xenon can be prepared?

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Oxides

Fluoride

Oxyfluorides

All of these

Which is volatile liquid?

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HF

HCl

HBr

Hl

The only non-metal in liquid form is

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S

Cl

Br

P

Corrosion proof parts of machinery are prepared from

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Iron

Copper

Plastic

Teflon

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

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 complete valence shell?

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C

N

O

Ne

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

HI

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

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Br2

F2

I2

Cl2

Bleaching powder may be produced by passing chlorine over

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Calcium carbonate

Hydrated calcium sulphate

Anhydrous calcium sulphate

Calcium hydroxide

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

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F₂

Cl₂

Br₂

I₂

Which has the least oxidizing power?

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F₂

Cl₂

Br₂

I₂

Astatine belongs to group

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I-A

II-A

III-A

VII-A

Noble gases in the atmosphere are

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4%

3%

2%

1%

The compound with cyclic hexamer is

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HF

HCl

HBr

HI

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

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HF

HBr

Hl

HCl

Bleaching powder is prepared by the reaction of Cl₂with.

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Lime stone

Lime water

slaked lime

Lime

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

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

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

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