Question

a. Metal is reacted with sodium hydroxide solution. Write the balanced chemical equation.
Name the gas produced? .How will you test the gas?
b. Metal carbonate + dil acid salt + water + a gas. Identify the gas and mention how will
you test the gas ?
c. Support your answer with a suitable chemical equation for both
​

Answer 1

Answer:

(a) Zn + 2HCl ------ZnCl2+ H2

(b)hygroden gas is evolved we can test it by bringing a burning candle near it ...it will burn with pop sound

Answer 2

Explanation:

NaOH react with zinc metal to form sodium zincate and evolve H2 gas.

2NaOH + zn ---- Na2ZnO2 + H2

H2 gas is evolved. when we take a burning candle near solution then H2 gas burn with pop sound.

b) when metal carbonate react with acid to give salt, water and co2 gas.

4HCl + NaHCO3 ----- 3NaCl + H2O + CO2

test of co2 ---- when gas passing through lime water then it turns into milky it show that gas is co2