(English Medium) ICSE Class 10 - CISCE Important Questions for Chemistry

Name the main constituent metal in the following alloy:
Stainless steel

Define:

Alloy

Name the alloys for the given composition:

Magnesium and aluminium

Identify the alloy in the given composition.

iron, nickel, chromium, carbon

Write one use of the following alloy:

Bronze

Write one use of the following alloy:

Fuse metal

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.