Q6 of 56 Page 88

Write true or false for the following statements:

Hydrogen gas is evolved when a metal reacts with nitric acid.

False

The hydrogen gas obtained from the reaction of metal and nitric acid is oxidized to water by nitric acid.


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4

Write true or false for the following statements:

Copper does not burn in air, but the hot metal is coated with a black coloured layer of copper (II) oxide.

 5

Write true or false for the following statements:

Silver and gold react with oxygen at high temperatures.

 7

Write true or false for the following statements:

Copper reacts vigorously with dilute HCl.

 8

Write true or false for the following statements:

A solution of an ionic compound in water contains ions, which move to the opposite electrodes when electricity is passed through the solution.