Question

(b) Assertion is true but reason is false.
(c) Assertion is false but reason is true.
(d) Both are true but reason is not correct explanation of assertion.
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Assertion: Plaster of Paris should be stored in moisture proof containers.
Reason: Plaster of Paris on coming in contact of moisture, absorbs water and reacts chemically
form hydrated calcium sulphate, which sets to form a hard mass.
Assertion Covalent compounds are generally good conductor of electricity.
Reason: Covalent compounds have cations and anions which can migrate to the opposite poles of
an electrolytic cell.​

Answer 1

b) A is true R is false

c) A is false reason is true

d) Both are true but R is not the correct explanation of A

Answer 2

Answer:

1. Assertion is true and reason is the correct explanation of assertion

Explanation:When plaster of paris comes in cintact with moisture it react with 3/2 molecule of water then it form gypsum and due to formation of gypsum salt the Plaster of Paris is going to be hard. So to prevent it from getting hard it should be kept in moisture proof container not in exposed air .

2. Assertion is wrong and reason is true

Covalent compounds are poor conductors of electricity as they do not produce ions in solution