Question

Assertion : when milk is left out at room temperature during summers , it becomes sour

Reason : the original substances present in milk lose their nature and form new chemical substances

HOW TO ANSWER
1) OPTION A - BOTH ASSERTION AND REASON ARE TRUE AND REASON IS THE EXPLANATION OF THE ASSERTION

2) OPTION B - BOTH ASSERTION AND REASON ARE TRUE BUT REASON IS NOT THE CORRECT EXPLANATION OF THE ASSERTION

3) OPTION C - ASSERTION IS TRUE BUT THE REASON IS FALSE

4) OPTION D - ASSERTION IS FALSE BUT THE REASON IS TRUE

Answer 1

Answer:

OPTION A both a and r are true and r is the correct explanation

Answer 2

Both assertion and reason are true and reason is the explanation of assertion. (Option A)

• In the summer season, the milk often becomes sour due to the environmental temperature. So,the assertion is completely true.

• Now,this happens because various microorganisms born in the milk during the higher temperatures of the summer season which is suitable for their growth. And these microorganisms produces lactic acid from the milk and the milk becomes sour.

• So,the milk becomes a different chemical substance,and that's why the reasoning is also true.