Q5 of 43 Page 60

Substances which increases rate of reaction :

Substances which increases the rate of a reaction are called catalysts. These substances effects the rate of a reaction and itself remains unaffected at the end.

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3

Electron releasing substance are called :

 4

Reactions which flow in both the direction are :

 6

Enzymes are :

 7

2Mg + O2 → 2MgO

In this reaction magnesium is being :