${\mathrm{CrO}}_3$ is an acidic oxide.

Important Questions on Metals and Non-metals

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 3 - Metals and Non-metals>Exercise 7>Q 26

${\mathrm{Al}}_2{\mathrm{O}}_3, {\mathrm{SnO}}_2$ and $\mathrm{ZnO}$ are amphoteric oxides.

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 3 - Metals and Non-metals>Exercise 7>Q 27

On dissolution of ${\mathrm{SO}}_2$ in water, there exists an equilibrium:
${\mathrm{SO}}_2+{\mathrm{H}}_2\mathrm{O}\iff {\mathrm{H}}_2{\mathrm{SO}}_3$

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 3 - Metals and Non-metals>Exercise 7>Q 28

Five metals $\mathrm{Cu}, \mathrm{Hg}, \mathrm{Ag}, \mathrm{Au}$ and $\mathrm{Pt}$ are placed below hydrogen in activity series.

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 3 - Metals and Non-metals>Exercise 7>Q 29

Sulphur is used in the vulcanisation of rubber.

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 3 - Metals and Non-metals>Exercise 7>Q 30

Metal hydrides on dissolution in water produce hydrogen gas.

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 3 - Metals and Non-metals>Exercise 7>Q 31

Aqua regia($3 \mathrm{part} \mathrm{HCl} + 1 \mathrm{Part} {\mathrm{HNO}}_3$) is also called royal water.

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 3 - Metals and Non-metals>Exercise 8>Q 1

Brass is an alloy of $\mathrm{Cu}$ and _____.

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 3 - Metals and Non-metals>Exercise 8>Q 3

An alloy of non-metal and metal is _____.