Reasoning Aptitude
ASSERTION AND REASON MCQs
Assertion And Reason
Total Questions : 239
| Page 22 of 24 pages
Answer: Option A. -> Both A and R are true and R is the correct explanation of A.
R provides the correct explanation of A.
Answer: Option C. -> A is true but R is false.
Weeds should not be allowed to grow along with the crops because they consume the plant nutrients.
Answer: Option B. -> Both A and R are true but R is NOT the correct explanation of A.
Diamond is very hard due to its rigid three dimensional structure and so, it is used for cutting glass. Refractive index of diamond is high and gives it the greater transparency and brilliance.
Answer: Option C. -> A is true but R is false.
Carbon dioxide reacts with lime water(calcium hydroxide) to form milky precipitate of calcium carbonate.
Question 215.
Directions: In each of the following questions, there are two statements labelled as Assertion (A) and Reason (R) . Give answer (a) If both 'A' and 'R' are true and 'R' is the correct explanation of 'A' (b) If both 'A' and 'R' are true but '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 (e) If both 'A' and 'R' are false.
- Assertion (A):
- Inside the Earth, metals are present in a molten state.
- Reason (R):
- The earth absorbs the Sun's rays.
Answer: Option C. -> If 'A' is true but 'R' is false
Answer: (c)
Inside the Earth, the high temperature and pressure keep the metals in a molten state.
The Earth does not absorb the Sun's rays but reflects them.
Answer: (c)
Inside the Earth, the high temperature and pressure keep the metals in a molten state.
The Earth does not absorb the Sun's rays but reflects them.
Question 216.
Directions: In each of the following questions, there are two statements labelled as Assertion (A) and Reason (R) . Give answer (a) If both 'A' and 'R' are true and 'R' is the correct explanation of 'A' (b) If both 'A' and 'R' are true but '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 (e) If both 'A' and 'R' are false.
- Assertion (A):
- Ashoka pillars have retained their gloss on their surface.
- Reason (R):
- Moisture-laden winds do not blow in the areas where it is located.
Answer: Option C. -> If 'A' is true but 'R' is false
Answer: (c)
Because of superior quality material being used, Ashoka pillars have retained their gloss on their surfaces.
Hence, R is completely false.
Answer: (c)
Because of superior quality material being used, Ashoka pillars have retained their gloss on their surfaces.
Hence, R is completely false.
Question 217.
Directions: In each of the following questions, there are two statements labelled as Assertion (A) and Reason (R) . Give answer (a) If both 'A' and 'R' are true and 'R' is the correct explanation of 'A' (b) If both 'A' and 'R' are true but '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 (e) If both 'A' and 'R' are false.
- Assertion (A):
- Graphite is slippery and used as a lubricant.
- Reason (R):
- Graphite has free electrons.
Answer: Option B. -> If both 'A' and 'R' are true but 'R' is not the correct explanation of 'A'
Answer: (b)
Graphite possesses a layer structure with two successive layers held by weak forces.
Because of such weak forces, these layers are able to slide over one another. Therefore, graphite is slippery and because of this property, it is used as a lubricant.
Answer: (b)
Graphite possesses a layer structure with two successive layers held by weak forces.
Because of such weak forces, these layers are able to slide over one another. Therefore, graphite is slippery and because of this property, it is used as a lubricant.
Question 218.
Directions: In each of the following questions, there are two statements labelled as Assertion (A) and Reason (R) . Give answer (a) If both 'A' and 'R' are true and 'R' is the correct explanation of 'A' (b) If both 'A' and 'R' are true but '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 (e) If both 'A' and 'R' are false.
- Assertion (A):
- British sovereignty continued to exist in India.
- Reason (R):
- The British sovereign appointed the last Governor-General of free India.
Answer: Option B. -> If both 'A' and 'R' are true but 'R' is not the correct explanation of 'A'
Answer: (b)
India drafted its own constitution and formed its own government after gaining independence.
Hence, A is false but R is true.
Answer: (b)
India drafted its own constitution and formed its own government after gaining independence.
Hence, A is false but R is true.
Question 219.
Directions: In each of the following questions, there are two statements labelled as Assertion (A) and Reason (R) . Give answer (a) If both 'A' and 'R' are true and 'R' is the correct explanation of 'A' (b) If both 'A' and 'R' are true but '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 (e) If both 'A' and 'R' are false.
- Assertion (A):
- We prefer to wear white clothes in winter.
- Reason (R):
- White clothes are good reflectors of heat.
Answer: Option D. -> If 'A' is false but 'R' is true
Answer: (d)
We prefer to wear dark clothes in winter as they absorb the heat and keep the body warm.
However, white clothes are good reflectors of heat and are warm in summer.
Answer: (d)
We prefer to wear dark clothes in winter as they absorb the heat and keep the body warm.
However, white clothes are good reflectors of heat and are warm in summer.
Question 220.
Directions: In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R). Mark your answer as per the codes provided below: (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. (e) Both A and are false.
- Assertion (A):
- The use of chlorofluorocarbons is banned throughout the world nowadays.
- Reason (R):
- These chemicals cause skin cancer.
Answer: Option C. -> A is true but R is false.
Answer: (c)
The use of chlorofluorocarbons is banned nowadays because these cause holes in the ozone layer through which ultraviolet rays penetrate and may cause skin cancer.
Answer: (c)
The use of chlorofluorocarbons is banned nowadays because these cause holes in the ozone layer through which ultraviolet rays penetrate and may cause skin cancer.
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