Question

8
1. Select the correct option:
1. Which type of reaction occurs when quick lime is added to water?
(a) Decomposition reaction
(b) Precipitation reaction
(C) Combination reaction
(d) Displacement reaction
2. Which of the following is an example of exothermic reaction?
(a) Respiration
(b) Cooking
(c) Rusting of iron
(d) Photosynthesis
3. Cu + 2AgNO3-CU(NO3)2 + 2Ag
(a) Combination Reaction
(b) Double-displacement reaction
(C) Decomposition reaction
(d) Displacement reaction
4. The majority of chemical reactions are usually by:
(a) absorption of energy only.
(b) liberation of heat only.
(c) either absorption or liberation of heat.
(d) either absorption or liberation of energy.
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Answer 1

1. Combination reaction
2. Respiration
3. Displacement reaction
4. either absorption or liberation of energy.