Question # 1

Which gas has highest boiling points.

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He

Ne

Ar

Kr

Which one of the following uses is not correctly related with the halogen.

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fluorine -------- Teflon

Chlorine ---------Bleaching powder

Bromine ---------------PVC plastics

Iodine -----------Iodex

Bleaching powder may be produced by passing chlorine over.

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Calcium carbonate

Hydrated calcium sulphate

Anhydrous calcium sulphate

Calcium hydroxide

___________ is use as a cooling medium for nuclear reactors

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Ne

He

Ar

Kr

Which one of the following acids acts as oxidizing agent but never a reducing agent.

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HCIO

HCIO2

HCIO3

HCIO4

Bleaching powder contains available chlorine approximately

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100%

70-80%

35-40%

10-20%

An element that has 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 halogen will react spontaneously with Au(s) to produce Au³⁺

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Br₂

F₂

I₂

Cl₂

The gas used in bactericidal lamps is

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Be

Ar

Kr

Xe

Bromine can be liberated from KBr solution by the action of.

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I2 solution

Chlorine

NaCl

KI

Chlorine heptoxide (CI₂O₇) reacts with water to form

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Which substance is used in photography

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AgCl

AgBr

AgI

Ag3PO4

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

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HF

HBr

HI

HCl

Which one of halogens is a liquid

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F₂

Cl₂

Br₂

I₂

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

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Br₂

F₂

I₂

Cl₂

Which one of the following gases exist in monoatomic form.

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Ozone

Nitrogen

Krypton

Phosphine

What is the oxidation state of Xenon in XeOF2

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0

+2

+4

+6

Which element form maximum compounds with Xenon

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F

Cl

Br

I

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