Question

A student takes an unknown solution(A). She observes that it does not turn blue litmus red and gives no effervescence with sodium hydrogen carbonate. However, a gas is evolvedwhen it reacts with zinc metal. i) Identify the unknown solution(A). ii) Name the gas evolved. Write the equation.

Answer 1

Explanation:

The unknown solution is sodium hydroxide. (2) The gas which evolves from it is hydrogen. The reaction can be summarised here as 2NaOH+Zn = Na2ZnO2 +H2. Sodium hydroxide is a potent caustic base and alkali which decomposes proteins even at ordinary temperatures and it may also cause serious chemical burns.

Answer 2

Answer:

hope it will help you mark as brainlist answer plz plzzzzzzzzzzzzz