Question # 1

Which gas has highest boiling points.

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He

Ne

Ar

Kr

Which is the strongest acid

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HCIO

HCIO₂

HCIO₃

HCIO₄

Chlorine heptoxide (CI₂O₇) reacts with water to form

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

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 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

Hydrogen bond is the strongest between the molecules of

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HF

HCl

HBr

HI

Bleaching powder may be produced by passing chlorine over

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calcium carbonate

hydrated calcium sulphate

calcium hydroxide

magnesium hydroxide

What is the oxidation state of Xenon in XeOF2

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0

+2

+4

+6

Which statement is correct about the given reaction.

2NaOH + Cl2 --------------- NaCl + NaCIO + H2O

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Cl is oxidized and O is reduced

Cl is reduced and O is oxidized

Cl is oxidized as well as reduced

Neither Cl nor oxygen is reduced or oxidized

The gas used in bactericidal lamps is

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Be

Ar

Kr

Xe

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

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HF

HBr

HI

HCl

___________ is use as a cooling medium for nuclear reactors

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Ne

He

Ar

Kr

Which halogen occurs naturally in a positive oxidation state.

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Fluorine

Chlorine

Bromine

Iodine

Which one of the following gases exist in monoatomic form.

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Ozone

Nitrogen

Krypton

Phosphine

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

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Br₂

F₂

I₂

Cl₂

Which halogen will react spontaneously with Au to produce Au3+

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Br2

F2

I2

Cl2

The most ionic is

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HF

HCl

HBr

HI

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

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HCIO

HCIO2

HCIO3

HCIO4

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