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Surface Area and Rate of Reaction

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Question

what happens when zinc granules are treated with dilute solution of h₂so₄,hcl,hno₃,nacl and naOH,also write the chemical equations if reaction occurs?

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Solution

The reactions can be written as
Zn + H₂SO₄ -------Ã ZnSO₄( zinc sulphate ) + H₂( hydrogen gas )
Zn + 2HCl --------Ã ZnCl₂( zinc chloride ) + H₂(hydrogen gas )
Zn + 2 HNO₃ ------Ã Zn ( NO₃)₂( zinc nitrate ) + H₂ ( hydrogen gas )
Zn + NaOH ------Ã Na₂ZnO₂( sodium zincate ) + H₂( hydrogen gas )
Zn + NaCl ---------Ã reaction is not feasible at ordinary temperature

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Q. (i) What happens when zinc granules are treated with dilute solution of

H_{2} S O_{4}

? Also write the chemical equations if reaction occurs.

(ii) What happens when zinc granules are treated with dilute solution of HCl? Also write the chemical equations if reaction occurs.

(iii) What happens when zinc granules are treated with dilute solution of

H N O_{3}

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(iv) What happens when zinc granules are treated with dilute solution of NaCl? Also write the chemical equations if reaction occurs.

(v) What happens when zinc granules are treated with dilute solution of NaOH? Also write the chemical equations if reaction occurs.

Q. Zinc granules give

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Question 41

What happens when a piece of

(a) zinc metal is added to copper sulphate solution?

(b) aluminium metal is added to dilute hydrochloric acid?

(c) silver metal is added to copper sulphate solution?

Also, write the balanced chemical equation if the reaction occurs.

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