Question

Some Zinc granules are added to the dilute sulphuric acid taken in a test tube . Another test tube is inverted over the mouth of the first test tube .
i) What will you observe in the first test tube?
ii) What happens when a burning splinter is brought near the mouth of the inverted test tube?
iii) Write the chemical equation involved in the reaction​

Answer 1

Answer:

) Zinc granules changes to powder

(b)Colour of zinc changes from grey to white

(c) Size of zinc granules keep on decreasing

(d) Surface of zinc metal becomes bright

Explanation:

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Answer 2

BELUGA!

1) When dilute sulphuric acid is poured on zinc granules, then zinc sulphate is formed along with the evolution of a gas. Zinc is more reactive than hydrogen, so displaced it from sulphuric acid.

2) The gas evolved is hydrogen. We can test its presence by bringing a burning candle near the mouth of the test tube and hearing for a popping sound. Only hydrogen gas burns with a 'pop' sound.

3) H2SO4 + Zn ---> ZnSO4 + H2