(English Medium) ICSE Class 10 - CISCE Important Questions

Name the alloy which is made up of Copper, Zinc and Tin.

Potassium sulfite on reacting with hydrochloric acid releases _______ gas. (Cl₂, SO₂, H₂S)

State one relevant observation for given reactions:

Action of dilute Hydrochloric acid on iron (II) sulfide.

When dilute HCl is added to a salt Q, a brisk effervescence is produced and the gas turns lime water milky.

When NH4OH solution is added to the above mixture (after adding dilute HCl), it produces a white precipitate which is soluble in excess NH4OH solution.

Write balanced chemical equations to show The behavior of H₂SO₄ as an acid when it reacts with Magnesium

Complete the following by selecting the correct option from the choices given:

The metal which does not react with water or dilute H₂SO₄ but reacts with concentrated H₂SO₄ is _________. (Al/Cu/Zn/Fe)

The aim of the Fountain experiment is to prove that ______.

State your observations when Dilute Hydrochloric acid is added to Copper carbonate

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