Question # 1

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

XeF6 n hydrolysis produces.

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XeOF2

XeOF3

XeOF4

XeF2

The most ionic is

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HF

HCl

HBr

HI

Hydrogen bond is the strongest between the molecules of.

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HF

HCl

HBr

HI

Which is the second most abundant element in the universe

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H

He

CO

C

The gas used in bactericidal lamps is

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Be

Ar

Kr

Xe

Which one is perchloric acid

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HClO

HClO₃

HClO₄

Chlorine heptoxide (CI₂O₇) reacts with water to form

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Bleaching powder may be produced by passing chlorine over

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calcium carbonate

hydrated calcium sulphate

calcium hydroxide

magnesium hydroxide

Which one of halogens is a liquid

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F₂

Cl₂

Br₂

I₂

Which one is chlorous acid

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HCIO

HCIO₂

HCIO₃

HCIO₄

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

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HF

HBr

HI

HCl

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

Colour of which halogen is not correctly related.

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F2 --- colourless gas

Cl2---- greenish yellow gas

Br2----- Reddish brown liquid

I2-------- grayish Black solid

Which halogen occurs naturally in a positive oxidation state

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Fluorine

Chlorine

Bromine

Iodine

Which gas has highest boiling points.

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He

Ne

Ar

Kr

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

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