Question

Observe the reaction between zinc and dilute hydrochloric acid and answer the following.

i. Predict the products for this reaction.
ii. Write the characteristic evidence for the above reaction.
iii. List any other two characteristics of a chemical reaction.
iv. Write the word and balanced chemical equation for the above reaction.
v. Which gas is evolved here? Explain the purpose of bringing burning candle here.



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Answer 1

Answer:

i) the products of the reaction are Zinc Sulphate and Hydeogen .

ii) if you bring a candle near the apparatus it burns with a pop sound . this indicates of hydrogen and hence is a characteristic evidence of the reaction.

iii) the other characteristics of the reaction are

1. rise in temperature ( exothermic reaction )
2. reduction reaction

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

v) hydrogen gas is evolved here. the candle burns with a pop sound when comes in touch with hydrogen .