Q2 of 22 Page 45

Write answers to the following.

How can the rate of the chemical reaction, namely, decomposition of hydrogen peroxide be increased?

Decomposition of hydrogen peroxide is a slow process:


2H2O2(l) → 2H2O + O2↑ (slow reaction)


But we can increase the rate of reaction by using a particular catalyst, i.e., Manganese dioxide powder (MnO2).



A catalyst is a substance which increases the rate of reaction without causing any chemical change.


More from this chapter

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1

Choose the correct option from the bracket and explain the statement giving reason.

(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)


a. To prevent rusting, a layer of ........ metal is applied on iron sheets.


b. The conversion of ferrous sulphate to ferric sulphate is ........ reaction.


c. When electric current is passed through acidulated water ........ of water takes place.


d. Addition of an aqueous solution of ZnSO4 to an aqueous solution of BaCl2 is an example of ....... reaction.

 2

Write answers to the following.

What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.

 2

Write answers to the following.

Explain the term reactant and product giving examples.

 2

Write answers to the following.

Explain the types of reaction with reference to oxygen and hydrogen. Illustratre with examples.