Heating lead (II) nitrate will produce ............ , ............... and oxygen

The colour of copper (II) oxide is.....

..................... is yellow when hot, white when cold

solid state - green colour

aqueous solution - blue

The salt is ..........

The gas turn the lime water cloudy, the ______ is present

A brown gas is released and turns the moist blue litmus to red. Name the gas.

A greenish yellow gas and tested with a moist blue litmus paper turn red then bleach it. Name the gas

A green salt is heated. Colourless gas released, the gas turns lime water chalky. Residue is black. Name the salt

A white salt is heated. Brown gas is released, the gas turns moist blue litmus

paper red. Residue is yellow when hot and white when cold.