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b) Acetic acid
c) Tea leaf
d) Oxygen

Subjective

Q. Questions Skill Marks
No.

1. What is the chemical composition of Vinegar? R 1

2. State one use of baking soda. U 1

3. . DIRECTION: Each of these questions contains an ` 1
Assertion followed by Reason. Read them
carefully and answer the question on the A
basis of following options. You have to select the
one that best describes the two statements.

a) If both Assertion and Reason are correct and
Reason is the correct explanation of Assertion.
b) If both Assertion and Reason are correct, but
Reason is not the correct explanation of
Assertion.
c) If Assertion is correct but Reason is incorrect.
d) If Assertion is incorrect but Reason is correct.
e) If Assertion & Reason both are incorrect.
Assertion(A.) : Carbon dioxide is a colourless gas evolved
in chemical reaction.

Reason(R): In a chemical reaction gas may be evolved.

4. Assertion: A potato becomes brown when peeled. U&A 1

Reason: The change of potato is reversible in nature.

5. If we keep clear lime water in air, a white layer is formed. HOTS 1+1+1+2

a) What is the chemical name of lime water?
b) Write its chemical formula.
c) Why there is a layer formation?
d) Mention the types of change with reason.

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