Question

pharynx → trachea
trachea - lungs
11. In the following questions, the Assertion and Reason have been put forward. Read the statements
carefully and choose the correct alternative from the following:
(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of
the Assertion.
(b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the
Assertion.
(c) Assertion is true but the Reason is false.
(d) The statement of the Assertion is false but the Reason is true.
Assertion: When air is passed through lime water, lime water turns milky.
Reason: Air contains 78% nitrogen and 21% oxygen.
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Answer 1

Answer:

option B

Explanation:

the air which passes through lime water is carbon dioxide (Co2).

air contains 78.09% nitrogen and 20.95%(approximately 21%) of oxygen.