Question

. The adsorption of hydrogen by metals is called? *

(a) Dehydrogenation

(b) Hydrogenation

(c) Adsorption

(d) Occlusion

Q 17. On heating which of the following releases CO₂ most easily? *

(a) MgCO₃

(b) K₂CO₃

(c) CaCO₃

(d) Na₂CO₃

Q 18. Suspension of slaked lime in water is known as *

(a) lime water

(b) aqueous solution of slaked lime

(c) quick lime

(d) milk of lime

Q 19. The chemical formula for Epsom salt is *

(a) CuSO₄.5H₂O

(b) MgSO₄.7H₂O

(c) CuSO₄.7H₂O

(d) MgSO₄.5H₂O

Q 20. NaOH is named as caustic soda because *

(a) It corrodes the organic tissues

(b) It reacts with chlorine gas

(c) It is used in soda water

(d) It reacts with fats to form soap

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Answer 1

Answer:

1. Dehydrogenation

2. MgCo3

3. Milk of line

4. Not confirmed but it may be option D

5. Option A

Answer 2

Answer:

1. occlusion

2. MgCO3

3. lime water

4. MgSO4.7H20

5. it corrodes the organic tissues