Question

Question 16 to 20

(1) Assertion and reason both are correct and reason is correct explanation of
assertion.

2. Both assertion and reason are correct statements but reason is not correct
explanation of assertion.

3. Assertion is correct statement but reason is wrong statement.

(iv) Assertion is wrong statement but reason is correct statement.

Q.16, Assertion : Significant figures for 0.200 is 3 whereas for 200 it is 1.
Reason : Zero at the end or right of a number are significant provided they are
not on the right side of the decimal point.

Q.17. Assertion : It is impossible to determine the exact position and exact momentum
of an electron simultaneously.
Reason : The path of an electron in an atom is clearly defined.

Q.18. Assertion : Though the central atom of both NH, and H.O molecules are sp?
hybridized, yet H-N-H bond angle is greater than that of H-O-H
Reason : This is because nitrogen atom has one lone pair and oxygen atom has
two lone pairs.

Q.19. Assertion : Spontaneous process is a irreversible process and may be reversed
by some external agency.
Reason : Decrease in enthalpy is a contributory factor for spontaneity.

Q.20.

Assertion : The carbonate of Lithium decomposes easily on heating to form
lithium oxide and Co2

Reason : Lithium being very small in size polarizes large carbonate ion leading
to the formation of more stable Li2O and CO2.​

Answer 1

Answer:

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