On heating lead nitrate, a pale yellow substance left is

When Zinc reacts with H₂SO₄, the gas liberated is

The coolant used in nuclear reactor is 

Mutual exchange of elements or radicals by two substances is known as

Nitrogen and hydrogen combines to form 

When a single substance split into 2 or more substances, the reaction is called

Magnesium ribbon burns with dazzling light and gives white ash called

On decomposition of mercuric oxide, the gas liberated is 

Decomposition of Phosphorus pentachloride is

When Zinc is added to dilute hydrochloric acid, the gas liberated is