A brown substance 'A' on heating in air forms a substance 'B'. When hydrogen is passed over heated B, it changes back to A.
Write chemical equations for the reactions.

A brown substance 'A' on heating in air forms a substance 'B'. When hydrogen is passed over heated B, it changes back to A. Name the chemical changes occuring during these processes.

A brown substance 'A' on heating in air forms a substance 'B'. When hydrogen is passed over heated B, it changes back to A. Guess the names of substance A and B.

Name the substance obtained by action of chlorine on dry slaked lime. Write chemical equation of the reaction.

Ethane (C_2H_6) burns in oxygen to form carbon dioxide and water. Write balanced chemical equation for this reaction.

Give chemical equations to show that: hydrogen gas is passed over heated calcium oxide.

On heating copper powder in air, the surface of copper powder becomes coated with black CuO. How can this black be converted into brown copper? Write chemical equation for the reaction that occurs during the colour change.

When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved, which is utilised in the hydrogenation of oil. Name the gas evolved. Write the chemical equation of the reaction involved and also write a test to detect the gas formed.

An orange solid A on heating gives a colourless gas B. The gas B in dry conditions is Passed Over heated Ca to give a solid C. The solid C further reacts with water to Produce gas D which forms a blue coloured compound E on reaction with copper sulphate solution. Identify A, B,C,D,E and give the sequence of reactions involved .

When a magnetic substance is heated, then it

How does new substance form in a chemical reaction?