Question

2 ml of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube when the content are formed a gas evolved which is bubbled thought a soap solution before testing write equation of chemical reaction involved and the test to detect gas name the gas which will be evolved when the same metal react with dilute solution of a strong acid

Answer 1

First answer is:-

NAOH + Zn = Na2ZnO2 + H2

This hydrogen gas can be tested by putting matchstick over the solution. The burning matchstick will extinguish by a pop sound.

Then, when zn metal reacts with a dilute strong acid such as HCl, it will give zinc chloride and hydrogen gas again.

HCl + Zn= ZnCl2 + H2

Hope u got satisfactory answer

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