Question # 1

Which shows maximum catenation property?

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S

Se

Te

O

Sodium is manufacture by the electrolysis of fused sodium chloride and not from an aqueous solution of sodium chloride because

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Sodium chloride does not ionize in the water solution

Sodium chloride is not soluble in water

Sodium deposited at the cathode may react with water to form sodium hydroxide

Electricity does not pass through aqueous NaCl

Aluminium oxide is:

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Acidic oxide

Basic oxide

Amphoteric oxided

None of these

Alkali metals react violently with halogens to form

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Hydrides

Halides

Anyhydrides

None of these

Which of the following is lighter

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Li

k

Na

Ca

Which of the following compounds is explosive in nature?

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Phosphorus trichloride

Nitrogen trichloride

Hyponitrous acid

Nitrosyl chloride

Which of the following is not the reactions of lithium

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Alkaline earth metals are usually

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Reducing agent

Oxidizing agent

Amphoteric

Acidic

The silver bromide in hypo (Na₂S₂O_{3) solution is}

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Soluble

Not soluble

Precipitated

Not effect

Permonosulphuric acid is known as

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Marshall's acid

Carlo's acid

Sulphuric acid

None of these

In a group IIA from top to bottom as the atomic number increases, there is regular decreases in

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Ionic size

Atomic size

Ionization potential

None of these

Which oxide of nitrogen is obtained on heating ammonium nitrate at 250° C?

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Nitric oxide

Nitrous oxide

Nitrogen dioxide

Dinitrogen tetraoxide

Sodium forms largely

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Normal oxides

Per-oxides

Superoxides

None of these

Which of the following salt is used as purgative

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CaSO₄

MgSO₄

BeSO₄

NaCl

Carbonates of alkali metals dissolves freely in water to form

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Acidic solutions

Neutral solution

Alkaline solution

None of these

P₂O₅is heated with water to give

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Hypophosphorus acid

Phosphorus acid

Hypophosphorus acid

Orthophosphorus acid

Which one of the following pentafluorides cannot be formed?

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PF₅

AsF₅

SbF₅

BiF₅

LiOH ______ soluble than NaOH

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More soluble

Less soluble

Equally soluble

None

The chemical formula of Epson salt is

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MgSO₄

MgCl₂

MgSO₄. 7H₂O

MgCl₂. 7H₂O

Basicity of orthoposphoric acid is

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2

3

4

5

Sulphuric acid has great affinity for water because

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It hydrolyses the acid

It decomposes the acid

Acid forms hydrates with water

Acid decomposes water

Plaster of pares is obtained by heating

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Gypsum

Epsom

Lime stone

Dolomite

Which on of the following compounds does not exist?

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NCl₅

AsF₅

SbCl₅

PF₅

In the earth crust sodium is

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2.50%

2.30%

2.40%

3.50%

What is chrome yellow?

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Pbo

Pb₂O

PbCrO₄

Pb₃O₄

The alkaline earth elements have in their s-orbital

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One electron

Two electron

No electron

Three electron

The element which has a simple cubic lattice in solid state is

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Se

Te

Po

None of these

Chemical composition of colemnite is:

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Ca₂B₆O₁₁.5H₂O

CaB₄O₇ .4 H₂O

Na₂B₇O₇. 4 H₂O

CaNaB₅O₉.8H₂O

When SO₂is passed through acidified K₂Cr₂O₇solution

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The solution turns blue

The solution is decolourised

SO₂is reduced

Green Cr₂(SO₄)₃is formed

The ore CaSO₄2H₂O has the general name

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Gypsum

Dolomite

Calcite

Epsom salt

The alkali metals form

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Ionic bond

Covalent bond

Co-ordinate bond

H-bond

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