(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

Complete the following:

In case of non-polar covalent bond, the covalent bond is formed in the ______ of atoms and shared electrons are ______ distributed. (corner, middle, equally, unequally)

Draw an electron dot diagram for the formation of the following. State the type of bonding present in them.

Hydroxyl ion

Give two example in following case:

Solid covalent compounds

Give two example in following case:
Gaseous polar compounds

Give two example in following case:
Gaseous non polar compounds

Give two example in following case:
Liquid non polar compounds

Is PbO₂ a base or not? Comment.

Write the balanced equation for the preparation of the following salt in the laboratory:

A soluble sulphate by the action of an acid on an insoluble base.

Write the balanced equation for the preparation of the following salt in the laboratory:

An insoluble salt by the action of an acid on another salt.

Write the balanced equation for the preparation of the following salt in the laboratory:

An insoluble base by the action of a soluble base on a soluble salt.

Write the balanced equation for the preparation of the following salt in the laboratory:

A soluble sulphate by the action of an acid on a metal.

Name two colourless gases, which when mixed, produce a white solid.

Solution A reacts with an acid B (which gives greenish yellow gas on reacting with oxidizing agents like Pb₃O₄) to give white precipitate C insoluble in nitric acid but soluble in ammonium hydroxide. Name A, B and C.

How is the following metallic oxide reduced? Write equations:

Iron (ll) oxide

How is the following metallic oxide reduced? Write the equation:

Zinc oxide

Explain with reason: 

In the electrolytic reduction of alumina, the graphite anode is gradually consumed.

Draw electron - dot structure and structural formula of methane.

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

Write a balanced chemical equation for each of the following reactions :
(i) Reduction of copper (II) oxide by hydrogen

Calculate the number of moles in 12g of oxygen gas.