Question # 1

The gas used in bactericidal lamps is

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Be

Ar

Kr

Xe

Chlorine heptoxide reacts with water to form

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Which element form maximum compounds with Xenon

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F

Cl

Br

I

Refrigeration capacity of liquid neon is greater than liquid helium by

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80 times

50 times

40 times

10 times

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

The anhydride of HCIO₄is

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CIO₃

CIO₂

Cl₂O₅

Cl₂O₇

The halogens ae best described by which of the following statements.

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Their outer shell is complete

Most of them are colourless

They all are oxidizing agent

They all are gases at room temperature

Which one of the following gases exist in monoatomic form.

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Ozone

Nitrogen

Krypton

Phosphine

Bleaching powder contains available chlorine approximately

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100%

70-80%

35-40%

10-20%

Which halogen occurs naturally in a positive oxidation state.

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Fluorine

Chlorine

Bromine

Iodine

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

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Br₂

F₂

I₂

Cl₂

Which raw material is used for preparation of bleaching powder.

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Cl2 and H2O

Cl2 and Lime

Cl2 and HOCl

HCl and Lime

Which is the strongest acid

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HCIO

HCIO₂

HCIO₃

HCIO₄

Which one of the following has highest melting and boiling points.

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HF

HBr

HCl

HI

Which one of the following is not use of chlorine.

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Formation PVC

Formation of mustard gas

Disinfectant and bleaching agent

Formation of sodium chloride

The most ionic is

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HF

HCl

HBr

HI

Which acid can not be stored in glass bottles.

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HCl

HF

H2SO4

HNO3

Bleaching powder may be produced by passing chlorine over.

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Calcium carbonate

Hydrated calcium sulphate

Anhydrous calcium sulphate

Calcium hydroxide

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