Chemistry Question Paper State Board 2025-2026 - 1

Question: 1

What are the two types of valency?

Answer:

Positive valency and

Negative valency.

Question: 2

What is atomic number?

Answer:

The total number of protons present in the nucleus of an atom is called its atomic number.

Question: 3

What is mass number?

Answer:

The total number of protons and neutrons present in the nucleus of an atom is called as mass number.

Question: 4

What is a balanced chemical equation?

Answer:

A balanced chemical equation is one in which the total number of atoms of any element on the reactant side is equal to die total number of atoms of that element on the product side.

Question: 5

Name the four laws of chemical combinations?

Answer: