H. ASSERTION AND REASON QUESTIONS:
1. Assertion(A) : A chemical change results in the formation of new substances with different properties.
Reason(R) : During a chemical change, the chemical bonds in the reactants are broken and new bonds are formed, resulting in new substances.
(a) \( A \) is correct, but \( R \) is incorrect.
(b) \( A \) is correct, but \( R \) is not a true explanation of \( A \).
(c) \( A \) is correct, and \( R \) is a true explanation of \( A \).
(d) Both A and R are incorrect.
2. Assertion(A) : Reactions that take place in presence of light are known as photochemical reactions.
Reason(R) : Light is a source of energy activating the chemical reactions.
(a) A is correct, but R is incorrect.
(b) \( A \) is correct, but \( R \) is not a true explanation of \( A \).
(c) \( A \) is correct, and \( R \) is a true explanation of \( A \).
(d) Both \( A \) and \( R \) are incorrect.
3. Assertion(A) : A catalyst participate in a chemical reaction.
Reason(R) : A catalyst decreases in mass at the end of chemical reaction.
(a) \( A \) is correct, but \( R \) is incorrect.
(b) \( A \) is correct, but \( R \) is not a true explanation of \( A \).
(c) \( A \) is correct, and \( R \) is a true explanation of \( A \).
(d) Both A and R are incorrect.
4. Assertion(A) : Rancidity of butter is due to oxidation.
Reason(R) : Butter reacts with oxygen to form off smelling compounds, with change in taste.
(a) A is correct, but R is incorrect.
(b) \( A \) is correct, but \( R \) is not a true explanation of \( A \).
(c) \( A \) is correct, and \( R \) is a true explanation of \( A \).
(d) Both A and R are incorrect.
5. Assertion(A) : Cutting a piece of paper is a chemical change.
Reason(R) : Cutting a piece of paper changes its size as well as its chemical composition.
(a) \( A \) is correct, but \( R \) is incorrect.
(b) \( A \) is correct, but \( R \) is not a true explanation of \( A \).
(c) \( A \) is correct, and \( R \) is a true explanation of \( A \).
(d) Both \( A \) and \( R \) are incorrect.
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ICSE Chemistry - 8