Q1 of 11 Page 62

Answer the following questions.

On what factors does the speed of chemical reactions depend?

There are several factors that affect the speed of a reaction:

Some of them are: (of a reaction)


•Nature of the reactants.


•Particle size of the reactants.


•Concentration of the reactants.


•Pressure of gaseous reactants.


•Temperature.


•Catalysts.


More from this chapter

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1

Answer the following questions.

Explain with examples what is meant by reduction.

 1

Answer the following questions.

What is a catalyst?

 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

 3

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.