When calcium metals is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metals to water catches fire. Why is it so?

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.

Name the gas evolved when dilute HCl reacts sodium hydrogen carbonate. How is it recognized?

Sodium hydrogen carbonate when added to acetic acid evolves a gas. Which of the following statements are true about the gas evolved It turns lime water millky It extinguishes a burning splinter It dissolves in a solution of sodium hydroxide It has a pungent odour

What is colour of gas evolved when sodium hydrogen carbonate reacts with dil. HCl?

What happens when a piece of sodium metal is added ethanol? Give chemical equation also?

When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH (Molecular mass=40) and liberates a gas Z which easily catches fire. Identify X,Y and Z and also write the reaction involved.

Why does calcium metal after reacting with water starts floating on its surface? Write the chemical equations for the reaction.