Aqua regia is a mixture of 3 parts of concentrated hydrochloric acid and 1 part of concentrated nitric acid. The least reactive metals such as gold and platinum dissolve in aqua regia solution.

Science (Theory & Practical) Class-10>Chapter 9 - Metals and Metallurgy>Questions>Q 3

MEDIUM

10th Chhattisgarh Board

IMPORTANT

Earn 100

Write the balanced chemical equations of the reactions of lead, magnesium, aluminium metals with oxygen?

Important Questions on Metals and Metallurgy

MEDIUM

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 9 - Metals and Metallurgy>Questions>Q 1

Write the balanced chemical equation for the reaction of calcium with water.

MEDIUM

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 9 - Metals and Metallurgy>Questions>Q 1

Write the balanced chemical equation for the reaction of iron with steam.

MEDIUM

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 9 - Metals and Metallurgy>Questions>Q 2

What gas is formed when aluminium metal reacts with dilute hydrochloric acid? Write the equation for the reaction.

EASY

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 9 - Metals and Metallurgy>Questions>Q 3

What is aqua regia?

MEDIUM

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 9 - Metals and Metallurgy>Exercise>Q 1

Take two copper wires of different thickness, if the wires are coated, clean them with sandpaper. Connect the thicker wire to the positive end and thinner wire to the negative end of a cell. Soak both the wires in a solution of copper sulphate ensuring that the wires do not touch each other inside the solution. Observe the solution after some time and answer the following questions: