Prep.3 2nd term lesson 1

In the thermal decomposition reactions, the compound decomposes by heat into its.....

• Simple components

• Primary elements

• Other compounds

• All the previous answers

Copper hydroxide color is...

• Blue

• Green

• Black

• Red

The color of copper carbonate is

• Green

• Blue

• Red

• Black

Thermal decomposition of metal sulphate produce metal oxide and.....

• Sulphate

• Carbonate

• Sulphur dioxide

• Sulphur trioxide

Thermal decomposition of metal nitrate produce....

• Metal nitrite and oxygen gas

• Metal azide and oxygen gas

• Nitrogen dioxide and oxygen gas

• Metal nitrite and hydrogen gas

Copper doesn't react with diluted hydrochloric acid

• True

• False

A red ppt. Is formed when magnesium is added to copper sulphate solution

• True

• False

The color of mercuric oxide is....

• Red

• Black

• Green

• Blue

Oxidation means....

• Gaining electrons

• Losing electrons

Oxidation procese occurs to...

• Oxidizing agent

• Reducing agent