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

An element L consists of molecules.

What type of bonding is present in the particles that make up L?

An element L consists of molecules.

When L is heated with iron metal, it forms a compound, FeL. What chemical term would you use to describe the change undergone by L?

State your observation when excess sodium hydroxide is added to calcium nitrate solution

Give balanced chemical equation to prepare the following salt:

Copper chloride using copper carbonate

1. The percentage composition of a gas is:
   Nitrogen 82.35%, Hydrogen 17.64%.
2. Find the empirical formula of the gas. [N = 14, H = 1]

Define a covalent bond.

What are the conditions necessary for the formation of covalent molecules?

What is the difference between ionic compounds and polar covalent compounds?

What is the difference between ionic compounds and covalent compounds?

What do you understand by polar covalent compounds?

Methane molecule is non-polar molecule. Explain.

Give the characteristic properties of covalent compounds.

Explain the following:
polar covalent compounds electricity.

For each compound mentioned above give the formulae of ions formed in aqueous solution.

State the type of bonding in the following molecule.
Water

State the type of bonding in the following molecule.
Hydroxyl ion

State the type of bonding in the following molecule.

Methane

State the type of bonding in the following molecule.

Ammonium ion

Define a coordinate bond.

Complete the following:

When the nuclei of two different reacting atoms are of ______ mass, then a bond so formed is called ______ covalent bond. (equal, unequal, polar, non-polar)