Chemical Reactions and Equations Quiz 5

In a decomposition reaction of $CuCO_3$ which one is formed?

The gas liberated when zinc carbonate decomposes is ………………

Zinc displaces the following gas from sulphuric acid ………………

Which of the following gases puts off the matchstick when calcium carbonate is heated?

Which of the following gases indicate the brown fumes liberating in the boiling tube when lead nitrate is heated?

A substance is in light yellow colour. If we put it in sunlight, it changes into grey colour. What is the substance?

In electrolysis of water experiment, the ratio of volumes of oxygen and hydrogen gases evolved is ………………

The process of preparing slaked lime by adding water to quicklime is this type of chemical reaction.

Which of the following precipitates is formed on mixing sodium sulphate with barium chloride solution?

Which of the following is the colour of hydrous copper sulphate $(CuSO_4)$?