EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 4

HARD

7th CBSE

IMPORTANT

Earn 100

Write the name of the following compound:
$H_{2} {SO}_{4}$

Important Questions on Physical and Chemical Changes

HARD

7th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 4

Write the name of the following compound:

NaOH

HARD

7th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 4

Write the name of the following compound:

{SO}_{2}

HARD

7th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 1

What are the evidences of a chemical reaction?

EASY

7th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 2

List the differences between physical and chemical changes.

HARD

7th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 3

Name the types of chemical reactions. Explain any one of them with a chemical equation.

HARD

7th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 4

Explain crystallisation.

HARD

7th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>HIGHER ORDER THINKING SKILLS

Write the name and number of atoms of the elements that the following compound is made up of.

${HNO}_{3}$ (nitric acid):

An example has been done for you:
${CO}_{2}$ (carbon dioxide): $1$ atom of carbon $+$ $2$ atoms of oxygen.

HARD

7th CBSE

IMPORTANT

EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>HIGHER ORDER THINKING SKILLS

Write the name and number of atoms of the elements that the following compound is made up of.

${CuSO}_{4}$ (copper sulphate):

An example has been done for you:

{CO}_{2}

(carbon dioxide):

1

atom of carbon

+

2

atoms of oxygen.