Question # 1

Calcium carbide reacts with water to produce

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Acetylene

Methane

Ethylene

Ethane

Commercial common salt becomes slight damp on storing because

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Common salt is hygroscope

Common salt contains some impurity, which is hygroscopic

Salt in efflorescent

Salt is crystalline

Which element among the following belongs to Group IV-A of the periodic table?

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Barium

Iodine

Lead

Oxygen

Phosphorus pentoxide finds use as

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An oxidizing agent

A reducing agent

A bleaching agent

A dehydrating agent

Which of the following fluorides does not exists?

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NF₅

PF₅

AsF₅

SbF₅

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

Which electronic configuration corresponds to an element of Group ||Z-A of the periodic table?

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1s, 2s², 2p⁶, 3s², 3p⁶, 4s²

1s², 2s², 2p⁶

1s², 2s², 2p⁶, 3s², 3p³

1s², 2s² , 2p⁶, 3s², 3p¹

The formula of lime stone is

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CaCl₂

MgCO₃

Na₂CO₃

CaCO₃

Which of the following is formed by the action of water on sodium peroxide?

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H₂

N₂

O₂

CO₂

Aluminium oxide is:

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Acidic oxide

Basic oxide

Amphoteric oxided

None of these

Baking powder has which one of the following formula

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Na₂CO₃

Na₂SO₄

NaHCO₃

K₂CO₃

Which is not the form of silica?

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Amethyst quatz

Rose quatz

Smoky

None of these

Which of all following compound is not possible

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Down's cell is used to prepare

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Sodium carbonate

Sodium bicarbonate

Sodium metal

Sodium hydroxide

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

Which of the following salt is used as purgative

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CaSO₄

MgSO₄

BeSO₄

NaCl

NaHCO₃is prepared by

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Down's process

Solvay's process

Nelson's process

None of these

The chemical formula of chile salt peter is

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Na₂CO₃

KNO₃

NaNO₃

NaNO₂

Which of the following is not the reactions of lithium

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Permonosulphuric acid is known as

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Marshall's acid

Carlo's acid

Sulphuric acid

None of these

Gypsum is applied to the soil to provide calcium and

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Oxygen

Nitrogen

Phosphorous

Sulphur

Which salt is used for preserving food

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CaCl₂

NaCl

Na₂SO₄

BaCl₂

The oxide of beryllium is

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Acidic

Amphoteric

Superoxide

Basic

What is going to replace the petroleum?

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Silica

Silicates

Silicones

Silicon

The electrolytic cell used for the production of metallic sodium is known as

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Down's cell

Solvary's cell

Haber's cell

None of these

CaC₂on hydrolysis form

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CH₄

C₂H₄

C₂H₂

C₆H₆

Which of the following is lighter

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Li

k

Na

Ca

Which of the following are electropositive in nature

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Alkali metals

Alkaline earth metals

Halogens

Alkali and alkaline earth metals

Which of the following oxides is peroxide?

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Na₂O₂

MnO₂

BaO

SO₂

Which will have the maximum value of heat of hydration

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Na⁺

Cs⁺

Ba⁺²

Mg⁺²

Which of the following is acidic?

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SO₃

N₂O

BeO

HgO

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