Question

In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R).
(1) Both (A) and (R) are true and (R) is the correct explanation of (A)
(2) Both (A) and (R) are true but (R) is not the correct explanation of (A)
(3) (A) is true but (R) is false
(4) (A) is false and (R) is true
9. A : Fluid friction is independent of the shape and size of the object. [1]
R : A rough surface has more number of irregularities hence the force of friction is greater.
10. A : When electric current passed through an electrolyte, it dissociates into its ions. [1]
R : The dissociation of electrolytes into their ions is due to heating effect of electric current.
11. A : Metals are sonorous. [1]
R : Metals are generally brittle in the solid state.
12. A : A polymer is made of many repeating units. [1]
R : A synthetic fibre is a chain of small repeating units joined together.
13. A : Deforestation increases the temperature and pollution level on the earth. [1]
R : It also lowers the ground water level.
14. A : Mitochondria are known as “power house” of the cell. [1]
R : Mitochondria synthesize energy required for activities of the cell

Answer 1

Answer:

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