Q1. (a) Write chemical equation for the reaction of Zinc metal on
sodium hydroxide.
(b) Name the gas formed.
(c) How do we detect the gas formed.
Answers
Explanation:
a . Zn (s) + H2SO4 (aq) —→ ZnSO4 (aq) + H2 (g) This is an example of a single displacement reaction of a non-metal by a metal. Zinc metal granules, dil. sulphuric acid, red and blue litmus papers, test tube, and candle.
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Answer: 2mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution before testing. Write the equation of the chemical reaction involved and the test to detect the gas. Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid.
Explanation:
When burning splint is held near the evolved it continues burning with pop sound indicating evolution of Hydrogen gas.