Question

11. Assertion: Gold and Platinum are noble metals Reason: Purity of Gold is expressed in terms of carats.
12. Assertion: A given sound is inaudible to the human ear Reason: The frequency of the sound is below 20 Hz


(i) Both A and R are true and R is the correct explanation of the assertion.
(ii) Both A and R are true and R is not the correct explanation of the assertion
(iii) A is true but R is false
(iv) A is false but R is true.

Answer 1

Answer:

11. both A and R are true and r is not the correct explanation of the assertion.

12 both a and r are true and r is the correct explanation of the assertion

Answer 2

Explanation:

11. Both A and R are true and R is the correct explanation of the assertion.

12. Both A and R are true and R is not the correct explanation of the assertion