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Science Assertion (A) & Reason (B) MCQ

Changes Around Us · Rajasthan Board (RBSE) STD 6 (Rajasthan - English Medium). 3 questions.

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Assertion (A) & Reason (B) MCQ

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3 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Directions: The questions in this segment consists of two statements, one labelled as "Assertion $A"$ and the other labelled as "Reason $R"$. You are to examine these two statements carefully and decide if the Assertion $A$ and Reason $R$ are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below.
Assertion A: The process of conversion of liquid water to its vapours by heating the liquid is called boiling.
Reason R: The process of conversion of water vapours to liquid by cooling the vapours is called condensation.
  • A
    Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
  • ✓
    Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
  • C
    $A$ is true but $R$ is false
  • D
    $A$ is false but $R$ is true
Answer
Correct option: B.
Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
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MCQ 21 Mark
Directions: The questions in this segment consists of two statements, one labelled as "Assertion $A"$ and the other labelled as "Reason $R"$. You are to examine these two statements carefully and decide if the Assertion $A$ and Reason $R$ are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below.
Assertion A: Burning of paper is a physical change.
Reason R: The products formed on burning of paper cannot be easily converted back to paper.
  • A
    Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
  • B
    Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
  • C
    $A$ is true but $R$ is false
  • ✓
    $A$ is false but $R$ is true
Answer
Correct option: D.
$A$ is false but $R$ is true

Burning of paper is a chemical change.

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MCQ 31 Mark
Directions: The questions in this segment consists of two statements, one labelled as "Assertion $A"$ and the other labelled as "Reason $R"$. You are to examine these two statements carefully and decide if the Assertion $A$ and Reason $R$ are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below.
Assertion A: The explosion of a fire cracker sis a physical changes.
Reason R: A physical change is a reversible change.
  • A
    Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
  • B
    Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
  • C
    $A$ is true but $R$ is false
  • ✓
    $A$ is false but $R$ is true
Answer
Correct option: D.
$A$ is false but $R$ is true
In it Assertion is false because the explosion of fire cracker is a chemical change. When a fire cracker explodes, new chemical substances are formed. Reason is true.
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