From the gases - ammonia , chlorine , hydrogen chloride , sulphur dioxide , select the gas that turns moist red litmus paper blue . Write the equation for the reaction - when the gas is passed over heated `CuO`.

Name the gas that turns moist red litmus blue.

Which gas is produced when potassium nitrate is heated? Write the equation for the reaction.

From the list of the gases - Ammonia ethane,hydrogen chloride hydrogen sulphide,ethyne- Select the gas which is used as a reducing agent in reducing copper oxide to copper.

What happens when (write balanced chemical equations only) Dry chlorine gas is passed over hot iron.

State the clour of - The vapours obtained when ammonia - oxyen gas mixture is passed over heated Pt.

A gas X is formed when a substance Y is heated with concentrated sulphuric acid. The gas X turns wet blue litmus paper red and gives dense white fumes with ammonia. Write balanced chemical equation for the reaction between gas X and ammonia.

Gas A is formed on the hydrolysis of calcium cyanamide. The gas can turn moist litmus paper blue and forms a brown precipitate with Nessler's reagent. The gas, A is

Write the reaction to prepare acetaldehyde from hydrogen gas and an acid chloride.

In passing chlorine gas through a concentrated solution of alkali we get chloride and chlorate ions Obtain balanced chemical equation for this reaction.

Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in figure below. (a) What will be the action of gas on (i) dry litmus paper? (ii) moist litmus paper? (b) Write a balanced chemical equation for the reaction taking place.