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Write balanced chemical equations for the following reactions :

(i) dilute sulphuric acid reacts with aluminium powder.

(ii) dilute hydrochloric acid reacts with sodium carbonate.

(iii) Carbon-dioxide is passed through lime water.

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(i) 2Al + 3H2SO4  AI2(SO4)3 + 3H2

(ii)Na2CO3 + 2HCl 2NaCl + H2O + CO2

(iii) Ca(OH)2+CO2  CaCO3+H2O

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