Q3 of 11 Page 62

Write the equations for each of the following reactions and name the reactants and products of each.

(a) Coal was burnt in air.


(b) Magnesium wire was lit.


(c) Dilute hydrochloric acid was poured on to some zinc.


(d) Water was poured on calcium oxide.

(a) C+ O2 —>CO2

Reactants: CarbonCoal and Oxygen


Products: Carbon Di Oxide


(b) 2Mg + O2---> 2MgO


Reactants: Magnesium and Oxygen


Products: Magnesium Oxide (MgO)


(c) Zn + 2HCl → ZnCl2 +H2


Reactants: Zinc and Hydrochloric acid


Products: Zinc chloride and Hydrogen gas


(d) CaO + H2O → Ca(OH)2


Reactants: Calcium Oxide and Water


Products: Calcium Hydroxide


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1

Answer the following questions.

On what factors does the speed of chemical reactions depend?

 2

Of which type is each of the following reactions?

(a) CaO + H2O —> Ca(OH)2 + Heat


(b) C+ O2 —>CO2


(c) Cl2+ H2 --> 2HCl


(d) 2Mg + O2---> 2MgO

 4

Match the following.

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Observe what happens when lemon juice falls on a Shahbad tile.