Question

(iv) 22n + H2SO4 +2ZnSO, + H2
d) What will happen if NaOH is used in place of dil. sulphuric acid and the test tube is heated?
(i) - It will produce sodium zincate (salt) and hydrogen gas.
(ii) It will produce sodium sulphate and hydrogen gas.
(i) It will produce sodium zincate (salt) and carbon dioxide gas.
(iv) It will produce sodium sulphate and carbon di oxide gas.
e) How will you test for the gas evolved ?
(i) Bring a glowing splint near test tube, it will reignite.
(ü) Bring moist litmus paper is placed in a test tube of this gas, it turns red.
(ü) Bring a burning splint-near the opening of a test tube containing this gas, a popping
sound occurs.
(iv) Using universal litmus solution.
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Answer 1

Explanation:

Zn+NaOH==Na2ZnO2+H2

d) ans- it will produce sodium zincate and hydrogen gas

e) iii) popping sound