(English Medium) ICSE Class 10 - CISCE Important Questions

State your observations when Dilute Hydrochloric acid is added to Sodium thiosulphate.

Select from the list the gas that matches the description given in case

[ammonia, ethane, hydrogen chloride, hydrogen sulfide, ethyne]

This gas produces dense white fumes with ammonia gas.

Select from the list the gas that matches the description given in case

[ammonia, ethane, hydrogen chloride, hydrogen sulfide, ethyne]

This gas has a characteristic rotten egg smell.

State one relevant observation for the following

When hydrogen sulfide gas is passed through lead acetate solution.

The acid on mixing with silver nitrate solution produces a white precipitate which is soluble in excess ammonium hydroxide

Write a balanced equation for the action of dilute hydrochloric acid on sodium sulphide.

State your observation When moist starch iodide paper is introduced into chlorine gas.

Study the figure given below and answer the questions which follow:

1. Identify the gas Y.
2. What property of gas Y does this experiment demonstrate?
3. Name another gas which has the same property and can be demonstrated through this experiment.

Name the gas that is produced in the given cases :

An action of dilute hydrochloride acid on sodium sulphide.

Dry hydrogen chloride gas can be collected by ________ displacement of air. (downward / upward)

For the preparation of hydrochloric acid in the laboratory:

What arrangement is done to dissolve hydrogen chloride gas in water?

Give a chemical test to distinguish between the given pairs of chemicals:

Sodium chloride solution and Sodium nitrate solution

When sodium chloride is heated with concentrated sulphuric acid below 200°C, one of the products formed is ______.

Distinguish between the following pairs of compounds using the reagent given in the bracket.
Mangenese dioxide and copper (II) oxide. (using concentrated HCl) 

How will you distinguished between dilute HCl and dilute H₂SO₄ using lead nitrate solution?

State your observation of the following case:

When calcium hydroxide is heated with ammonium chloride crystals.

State the following:

The drying agent used in the laboratory preparation of HCl gas.

Write a balanced equation for the following conversion:

Sodium chloride from sodium sulphite and dilute hydrochloric acid.

Identify the terms for the following:

A method used to collect HCl gas.

Distinguish between the following:

Dilute HCl and dilute HNO₃ [using silver nitrate solution]