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Science Assertion (A) & Reason (B) MCQ

Heat · Gujarat Board (GSEB) STD 7 (GSEB - English Medium). 6 questions.

Questions

Assertion (A) & Reason (B) MCQ

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6 questions · auto-graded multiple-choice test.

MCQ 11 Mark
The following question consist of two statement
Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below
Assertion (A) We feel more comfortable in dark coloured clothes in winter season.
Reason (R) Dark coloured clothes reflect most of the heat that falls on them.
  • 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.
  • ✓
    A is true but R is false.
  • D
    A is false but R is true.
Answer
Correct option: C.
A is true but R is false.
(C) A is true but R is false.
Dark coloured clothes absorb most of the heat that falls on them that's why we feel more comfortable in dark coloured clothes in winter season.
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MCQ 21 Mark
The following question consist of two statement
Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below
Assertion (A) The clinical thermometer has the range of 35°C to 42°C. 
Reason (R) The temperature of human body normally does not go below 35°C or above 42°C.
  • ✓
    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.
  • D
    A is false but R is true.
Answer
Correct option: A.
Both A and R are true and R is the correct explanation of A.
(A) Both A and R are true and R is the correct explanation of A.
The temperature of human body does not go below 35°C or above 42°C that's why the temperature scale of a clinical thermometer is in between 35°C to 42°C.
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MCQ 31 Mark
The following question consist of two statement
Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below
Assertion (A) Sunlight reaches to the earth by radiation process.
Reason (R) The transfer of heat by radiation does not require any medium.
  • ✓
    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.
  • D
    A is false but R is true.
Answer
Correct option: A.
Both A and R are true and R is the correct explanation of A.
(A) Both A and R are true and R is the correct explanation of A.
The process of transfer of heat energy from a hot body to a cold body by means of heat rays without any medium between them is known as radiation. So, sunlight does not require any medium to reach earth from space.
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MCQ 41 Mark
The following question consist of two statement
Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below
Assertion (A) We prefer woollen clothes in winter season.
Reason (R) Wool is a poor conductor of heat. It has air trapped in between the fibres.
  • ✓
    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.
  • D
    A is false but R is true.
Answer
Correct option: A.
Both A and R are true and R is the correct explanation of A.
(A) Both A and R are true and R is the correct explanation of A.
Wool is poor conductor of heat. The air gets trapped in between the wool fibres. This air prevents the flow of heat from our body to the cold surroundings.
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MCQ 51 Mark
The following questions consist of two statements Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below.
Assertion (A) We feel more comfortable in light coloured clothes in the summer.
Reason (R) Light coloured clothes absorb less heat from the sun.
  • ✓
    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.
  • D
    A is false but R are true.
Answer
Correct option: A.
Both A and R are true and R is the correct explanation of A.
A
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MCQ 61 Mark
The following questions consist of two statements Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below.
Assertion (A) A clinical thermometer has a scale in the range of-10°C to 110°C.
Reason (R) The normal body temperature of a human is 37°C.
  • 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 are true.
Answer
Correct option: D.
A is false but R are true.
D
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