Formula for potassium biphosphate is ${\mathrm{KHPO}}_4$.

Important Questions on Language of Chemistry and Transformation of Substances

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (COMPETITION WING)>Q 3

The compounds ${\mathrm{H}}_2\mathrm{O}$ and ${\mathrm{D}}_2\mathrm{O}$ follow law of multiple proportions.

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (COMPETITION WING)>Q 4

${\mathrm{A}}_2\mathrm{X}$ is comprised two divalent negative radicals and one monovalent positive radical.

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (COMPETITION WING)>Q 5

Formation of sodium nitrite and oxygen by thermal decomposition of sodium nitrate involves only a chemical change.

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (COMPETITION WING)>Q 6

The reaction $\mathrm{C}+{\mathrm{O}}_2\to \mathrm{CO}$, follows the law of conservation of mass.

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (COMPETITION WING)>Q 7

Valency of sulphur in ${\mathrm{SO}}_2$ is $2$.

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (COMPETITION WING)>Q 8

In exothermic reactions, the energy of products is more than the energy of reactants.

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (COMPETITION WING)>Q 17

Which of the following is not a physical change?

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (COMPETITION WING)>Q 18

Which of the following double displacement reactions is correct?