Assertion and Reason problems
- 1. Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion (A) : Weeds should not be allowed to grow along with the crops. Reason (R) : Weeds leave no space for plants to grow.
Options- 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.
- D. A is false but R is true. Discuss
Correct Answer: A is true but R is false.
Explanation:
Weeds should not be allowed to grow along with the crops because they consume the plant nutrients.
- 2. Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 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. 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. Discuss
Correct Answer: A is true but R is false.
Explanation:
Iron with specific gravity less than that of mercury but more than that of water, floats in the former but gets immersed in the second
- 3. Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion (A) : We feel colder on mountains than on plains. Reason (R) : Temperature decreases with altitude.
Options- 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.
- D. A is false but R is true. Discuss
Correct Answer: Both A and R are true and R is the correct explanation of A.
Explanation:
Higher above the sea level, temperature decreases at the rate of 1 degree centigarade for every 165 me-tres of ascent making mountain peaks colder.
- 4. Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion (A) : Cut fruits and vegetables should not be kept in open for long. Reason (R) : Their vitamin content is ruined.
Options- 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.
- D. A is false but R is true. Discuss
Correct Answer: Both A and R are true and R is the correct explanation of A.
Explanation:
When cut fruits and vegetables are kept in open, the vitamins in them get oxidised and remain of no use.
- 5. Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion (A) : In India, people elect their own representatives. Reason (R) : India is a democracy.
Options- 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.
- D. A is false but R is true. Discuss
Correct Answer: Both A and R are true and R is the correct explanation of A.
Explanation:
India, being a democracy, it is a government run by the representatives elected by its people
- 6. Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion (A) : In India, females have higher life expectancy than the males. Reason (R) : Females receive a better diet.
Options- 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.
- D. Both A and R are false. Discuss
Correct Answer: Both A and R are false.
Explanation:
In India, due to high birth rate and due to neglect, females have a lower life expectancy than the males and although females need a better diet, they do not receive it.
- 7. Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion (A) : Gandhiji withdrew the non-cooperation movement Reason (R) : There was violence at the Chauri Chaura outrage
Options- 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.
- D. A is false but R is true. Discuss
Correct Answer: Both A and R are true and R is the correct explanation of A.
Explanation:
Gandhiji withdrew the non-cooperation movement because of the violence in the Chauri Chaura outrage.
- 8. Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion (A) : Mohammad-bin-Tughluq is called the 'wisest fool'. Reason (R) : He had wise plans but implemented them foolishly.
Options- 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.
- D. A is false but R is true. Discuss
Correct Answer: Both A and R are true and R is the correct explanation of A.
Explanation:
R provides the correct explanation of A.
- 9. Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion (A) : Leakages in household gas cylinders can be detected. Reason (R) : LPG has a strong smell.
Options- 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.
- D. A is false but R is true. Discuss
Correct Answer: A is true but R is false.
Explanation:
Leakages in household gas cylinders can be detected because of the strong smell of ethyl merceptan mixed with LPG.
- 10. Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion (A) : Bats can fly in the night. Reason (R) : Bats emit ultrasonics.
Options- 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.
- D. A is false but R is true. Discuss
Correct Answer: Both A and R are true and R is the correct explanation of A.
Explanation:
Bats can fly in the night because they can trace the obstacle in the path by perceiving the echo of the ultrasonic sound emitted by them after it is reflected by the obstacle.
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