Thermochemistry (Part 5)

Which of the following is an example of exothermic reaction?

I Respiration

II Rusting of iron

III Neutralisation

IV Dissolving ammonium chloride in water

• I, II, III

• I, II, IV

• I, III, IV

• II, III, IV

Which of the following is an example of endothermic reaction?

I Dissolving ammonium salt in water

II Dissolving potassium salt in water

III Neutralisation

IV Decomposition of nitrate salts by heat

• I, II, III

• I, II, IV

• I, III, IV

• II, III, IV

_____ are used to reduce pain and muscle cramps during vigorous activities.

• Hot packs

• Cold packs

• Backpack

• Six packs

_____ are used to reduce high fever.

• Hot packs

• Cold packs

• Backpack

• Six packs

_____ are used to make blood vessels expand.

• Hot packs

• Cold packs

• Backpack

• Six packs

_____ are used to constrict blood vessels.

• Hot packs

• Cold packs

• Backpack

• Six packs

_____ are used to reduce pain and swelling from minor injury.

• Hot packs

• Cold packs

• Backpack

• Six packs

What is the type of reaction shown in the diagram?

• Exothermic reaction

• Endothermic reaction

• Combination reaction

• Decomposition reaction

The container used in exothermic reaction will become _____.

• cold

• warm

• small

• big

Heat released in exothermic reaction is _____ heat absorbed.

• more than

• less than

• equal to

• same as