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- Question
- Assertion (A)
Red, green colour blindness occurs with more frequency in males than in females.
Reason (R)
Females have two X-chromosomes and males have one.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is true but R is true
- Correct Answer
- if both A and R are true and R is the correct explanation of A
ExplanationBoth assertion and reason are correct and reason is correct explanation for the assertion as if mutation for colour blindness occurs in one X-chromosome, female have one normal chromosome.
- 1. Assertion (A)
Mercury is the farthest planet from the Sun.
Reason (R)
Mercury is the smallest planet in the entire solar system.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is false but R is true Discuss
- 2. Assertion (A)
Earthworms are not good for agriculture.
Reason (R)
Earthworms break down the soil into fine particles and make it soft.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is false but R is true Discuss
- 3. Assertion (A)
We prefer to wear white clothes in winter.
Reason (R)
White clothes are good reflectors of heat.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is false but R is true Discuss
- 4. Assertion (A)
The steam engine was invented by James Watt.
Reason (R)
There was a problem of taking out water from flooded mines.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is true but R is true Discuss
- 5. Assertion (A)
When common salt is kept open, it absorbs moisture from the air.
Reason (R)
Common salt contains magnesium chloride.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is true but R is true Discuss
- 6. Assertion (A)
Indus Valley people knew the art of navigation.
Reason (R)
Indus Valley seals indicate prevalence of overseas trade.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is false but R is true Discuss
- 7. Assertion (A)
A person with blood group-O is supposed to be an universal donor.
Reason (R)
Group-O does not contain any anti-gens.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is true but R is true Discuss
- 8. Assertion (A)
Most of the Himalayan rivers are perennial.
Reason (R)
They are fed by melting snow.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is true but R is true Discuss
- 9. Assertion (A)
An iron ball floats on mercury but gets immersed in water.
Reason (R)
The specific gravity of iron is more than that of mercury.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is true but R is true Discuss
- 10. Assertion (A)
Noise pollution is an unwanted accumulation of noise in the atmosphere.
Reason (R)
It interferes with communication.
Options- A. if both A and R are true and R is the correct explanation of A
- B. if both A and R are true and R is not the correct explanation of A
- C. if A is true but R is false
- D. if A is true but R is true Discuss
Assertion and Reason problems
Search Results
Correct Answer: if A is false but R is true
Explanation:
We know that, mercury is the smallest planet but it is not the farthest planet.
Correct Answer: if A is false but R is true
Explanation:
Earthworms are good for agriculture as they make the soil fertile. Therefore, assertion is false but the reason is true.
Correct Answer: if A is false but R is true
Explanation:
We prefer coloured/dark clothes in winter as they absorb heat but given reason is true for white clothes.
Correct Answer: if A is true but R is false
Explanation:
Assertion is correct but reason is false.
Correct Answer: if both A and R are true and R is the correct explanation of A
Explanation:
We know that, common salt contains magnesium chloride. Therefore, it absorbs moisture from the air.
Correct Answer: if A is true but R is false
Explanation:
Indus Valley people knew the art of navigation but the reason that the seals of that time indicate prevalence of overseas trade is false.
Correct Answer: if A is true but R is false
Explanation:
We know that the person with blood group-O is the universal blood donor but group-O positive blood group contains anti-gens for Rh factor.
Correct Answer: if both A and R are true and R is the correct explanation of A
Explanation:
Most Himalayan rivers are perennial because they are fed by the melting snow throughout the year.
Correct Answer: if A is true but R is false
Explanation:
Iron has specific gravity less than that of mercury but more than that of water so, floats on mercury but gets immersed in water.
Correct Answer: if both A and R are true and R is the correct explanation of A
Explanation:
Noise pollution is an unwanted accumulation of noise in the atmosphere as it interferes with communication.
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