Write the balanced chemical equation to prepare ammonia gas in the laboratory by using an alkali.

Ammonia gas is obtained by treating ammonium chloride with calcium hydroxide. The balanced chemical equation is: Ca OH 2 Slaked lime + 2 NH 4 Cl Ammonium chloride → CaCl 2 + 2 H 2 O + 3 NH 3 ↑ Ammonia

State why for the preparation of nitric acid, the complete apparatus is made up of glass.

The apparatus used for the laboratory preparation of nitric acid are made of glass completely because the vapours of nitric acid are highly corrosive. They attack rubber, cork and plastics etc.

What is the type of salt formed when the reactants are heated at a suitable temperature for the preparation of nitric acid?

In the preparation of nitric acid, sodium sulphate salt is formed when the sodium nitrate and concentrated sulphuric acid are heated below 200 ° C . NaNO 3 + H 2 SO 4 Conc . → < 200 ° C NaHSO 4 Sodium bisulphate + HNO 3

Name the gas that is produced in the following case. Sulphur is oxidized by concentrated nitric acid.

When the nitric acid reacts with sulphur, nitric acid oxidizes sulphur to sulphuric acid and water is formed with the release of the nitrogen dioxide gas. S + 6 HNO 3 → H 2 SO 4 + 2 H 2 O + 6 NO 2

E M B I B E

All in One - ICSE Chemistry>Chapter 8 - Study of Compounds>ARCHIVES*(Last 6 Years)>Q 18

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10th ICSE

IMPORTANT

Earn 100

State your observations when dilute hydrochloric acid is added to lead nitrate solution and the mixture is heated.

Important Questions on Study of Compounds

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10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 8 - Study of Compounds>ARCHIVES*(Last 6 Years)>Q 18

State your observations when concentrated sulphuric acid is added to sugar crystals.

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10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 8 - Study of Compounds>ARCHIVES*(Last 6 Years)>Q 18

State your observations when dilute hydrochloric acid is added to copper carbonate.

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10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 8 - Study of Compounds>ARCHIVES*(Last 6 Years)>Q 18

State your observations when dilute hydrochloric acid is added to sodium thiosulphate.

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10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 8 - Study of Compounds>ARCHIVES*(Last 6 Years)>Q 20

Choose from the following metals to answer the question given below.

Aluminium, calcium, copper, iron, magnesium, potassium, nickel, zinc.

Name a metal that does not react with cold water.

EASY

10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 8 - Study of Compounds>ARCHIVES*(Last 6 Years)>Q 20

Name the gas evolved when the mixtures of calcium hydroxide and ammonium chloride are heated. (Ammonia/ Chlorine)

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10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 8 - Study of Compounds>ARCHIVES*(Last 6 Years)>Q 21

Write a balanced chemical equation when the excess of ammonia is treated with chlorine.

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10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 8 - Study of Compounds>ARCHIVES*(Last 6 Years)>Q 21

Write the balanced chemical equation to illustrate the reducing nature of ammonia.

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10th ICSE

IMPORTANT

All in One - ICSE Chemistry>Chapter 8 - Study of Compounds>ARCHIVES*(Last 6 Years)>Q 21

A, B, C

and

D

summarise the properties of sulphuric acid depending on whether it is dilute or concentrated. Choose the property (A, B, C and D) depending on which is relevant to the preparation of hydrogen chloride gas.

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