Question

4
D) PD
Cla
a)PS
II. ASSERTION AND REASONING:
DIRECTION: In the following questions, a statement of assertion (A) is followed by a statement of reason
(R). Mark the correct choice as:
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of
assertion (A)
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of
assertion (A)
(C) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true
1. Assertion: When 10 g of CaCO3 is decomposed, 5.6 gof residue is left and 4.4 g of CO2 escapes.
Reason: Law of conservation of mass is followed.
2. Assertion: Pure water obtained from different sources such as river, well, spring, sea etc. always
contains hydrogen and oxygen combined in the ratio of 1:8 by mass.
Reason: A chemical compound always contains same elements combined in same fixed proportion by
mass.​

Answer 1

Answer:

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