Explore topic-wise MCQs in Assertion and Reason.

This section includes 161 Mcqs, each offering curated multiple-choice questions to sharpen your Assertion and Reason knowledge and support exam preparation. Choose a topic below to get started.

51.

Assertion (A) : When a body is dipped in liquid fully or partially, there is a decrease in weight. Reason (R) : The decrease in weight is due to the higher density of the displaced liquid.

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.
Answer» D. A is false but R is true.
52.

Assertion (A) : When common salt is kept open, it absorbs moisture from the air. Reason (R) : Common salt contains magnesium chloride.

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.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
53.

Assertion (A) : A little gap is left between iron rails. Reason (R) : Iron expands in summer.

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.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
54.

Assertion (A) : Uranium undergoes nuclear fusion reaction. Reason (R) : It has a big, unstable nucleus.

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.
Answer» E.
55.

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.

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.
Answer» D. A is false but R is true.
56.

Assertion (A) : Copper is used to make electric wires. Reason (R) : Copper has very low electrical resistance.

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.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
57.

Assertion (A) : In India, the judiciary is independent of the executive. Reason (R) : Judiciary favours the government and helps in the implementation of its plans.

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.
Answer» D. A is false but R is true.
58.

Assertion (A) : Baking soda creates acidity in the stomach. Reason (R) : Baking soda is alkaline.

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.
Answer» E.
59.

Assertion (A) : Tamil Nadu gets most of the rainfall in winter. Reason (R) : Tamil Nadu gets rainfall from retreating monsoons.

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. Both A and R are false
D. A is true but R is false.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
60.

Assertion (A) : Increase in carbon dioxide would melt polarice. Reason (R) : Global temperature would rise.

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. Both A and R are false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
61.

Assertion (A) : The Steam engine was invented by James Watt. Reason (R) : There was a problem of taking out water from flooded mines.

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.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
62.

Assertion (A) : Bangladesh imports jute from India. Reason (R) : Bangladesh has most of the jute mills

A. Both A and R are true and R is the correct explanation of A.
B. A is true but R is false.
C. Both A and R are false.
D. A is false but R is true.
Answer» D. A is false but R is true.
63.

Assertion (A) : Goitre is a common disease in mountainous regions. Reason (R) : The diet of the people in mountains lacks iodine content.

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
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
64.

Assertion (A) : Roughage prevents constipation. Reason (R) : Roughage adds bulk to the food.

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. Both A and R are false
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
65.

Assertion (A) : Sprouting should not be done before consuming the grains. Reason (R) : Sprouting kills many vital vitamins.

A. Both A and R are true and R is the correct explanation of A.
B. A is true but R is false.
C. Both A and R are false
D. A is false but R is true.
Answer» D. A is false but R is true.
66.

Assertion (A) : Milk production in India is low a compared to other countries of the world. Reason (R) : The animal rearers in India are poor.

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.
Answer» D. A is false but R is true.
67.

Assertion (A) : The body of the fish is streamlined. Reason (R) : The streamlined body helps the fish to cut its way through the water.

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
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
68.

Assertiona (A) : Food materials should not be soaked in water for a long time. Reason (R) : Washing leads to loss of Vitamin A and Vitamin D from the foodstuff.

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.
Answer» D. A is false but R is true.
69.

Assertion (A) : Buddha left home after his marriage. Reason (R) : He wished to be free of all worldly ties and become an ascetic.

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.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
70.

Assertion (A) : Most of the ancient civilisations grew near the rivers. Reason (R) : The main occupation of man was agriculture

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.
Answer» C. A is true but R is false.
71.

Assertion (A) : In the upper course, the main work of the river is erosion. Reason (R) : River flows swiftly in the upper course.

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. Both A and R are false
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
72.

Assertion (A) : Pluto is the coldest planet. Reason (R) : It receives slanting rays of the sun.

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.
Answer» D. A is false but R is true.
73.

Assertion (A) : Safety fuses are made up of materials having a high melting point. Reason (R) : Safety fuses should be resistant to electric current.

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. Both A and R are false
D. A is false but R is true.
Answer» D. A is false but R is true.
74.

Assertion (A) : Water kept in earthen pots gets cooled in summer. Reason (R) : Evaporation causes cooling.

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. Both A and R are false
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
75.

Assertion (A) : We feel comfortable in hot and humid climate. Reason (R) : Sweat evaporates faster in humid climate.

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. Both A and R are false.
D. A is false but R is true.
Answer» D. A is false but R is true.
76.

Assertion (A) : Leaves of plants are green. Reason (R) : Plants contain Chromoplasts, the green pigment.

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.
Answer» D. A is false but R is true.
77.

Assertion (A) : India is facing the problem of inflation. Reason (R) : We have to failed to check the growth of black money.

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.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
78.

Assertion (A) : Bronze is used for making statues. Reason (R) : Bronze is an alloy of copper and tin.

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.
Answer» C. A is true but R is false.
79.

Assertion (A) : The use of Chlorofluorocarbon carbons is banned throughout the world nowadays. Reason (R) : These chemicals cause skin cancer.

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.
Answer» D. A is false but R is true.
80.

Assertion (A) : Plaster of Paris is used by doctors by setting fractured bones. Reason (R) : When plaster of Paris is mixed with water and applied around the fractured limbs, it sets in to a hard mass.

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.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
81.

Assertion (A) : Land breeze blows during night. Reason (R) : Land gets heated up quickly.

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.
Answer» C. A is true but R is false.
82.

Assertion (A) : Mohammad-bin-Tughluq is called the 'wisest fool'. Reason (R) : He had wise plans but implemented them foolishly.

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.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
83.

Assertion (A) : Land breeze blows during night. Reason (R) : Land gets heated up quickly.

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.
Answer» C. A is true but R is false.
84.

Assertion (A) : Simla is colder than Delhi. Reason (R) : Simla is at a higher altitude as compared to Delhi.

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.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
85.

Assertion (A) : Leakages in household gas cylinders can be detected. Reason (R) : LPG has a strong smell.

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.
Answer» D. A is false but R is true.
86.

Assertion (A) : We prefer to wear white clothes in winter. Reason (R) : White clothes are good reflectors of heat.

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.
Answer» E.
87.

Assertion (A) : Leaves of plants are green. Reason (R) : Plants contain chromoplasts, the green pigment.

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.
Answer» D. A is false but R is true.
88.

Assertion (A) : India is facing the problem of inflation. Reason (R) : We have failed to check the growth of black money.

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
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
89.

Assertion (A) : Bronze is used for making statues. Reason (R) : Bronze is an alloy of copper and trin.

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
Answer» C. A is true but R is false.
90.

Assertion (A) : The use of chlorofluoro carbons is banned throughout the world nowadays. Reason (R) : These chemicals cause skin cancer.

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.
Answer» D. A is false but R is true.
91.

Assertion (A) : We feel comfortable in hot and humid climate. Reason (R) : Sweat evaporates faster in humid climate.

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
Answer» E.
92.

Assertion (A) : The freezing of sea water during winter does not kill the fishes. Reason (R) : Only surface water is frozen.

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.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
93.

Assertion (A) : Plaster of Paris is used by doctors for setting fractured bones. Reason (R) : When Plaster of Paris is mixed with water and applied around the fractured limbs, it sets into a hard mass.

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
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
94.

Assertion (A) : Amoebiasis is an occupational disease. Reason (R) : Amoebiasis is caused by inhalation of asbestos dust.

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
Answer» E.
95.

Assertion (A) : Most of the ancient civilisations grew near the river. Reason (R) : The main occupation of man was agriculture.

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.
Answer» C. A is true but R is false.
96.

Assertion (A) : Pluto is the coldest planet. Reason (R) : It receives slanting rays of the sun.

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.
Answer» D.
97.

Assertion (A) : In the upper course, the main work of the river is erosion. Reason (R) : River flows swiftly in the upper course.

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. Both A and R are false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
98.

Assertion: The president dissolved the 12th Lok Sabha but asked the present government to continue as a caretaker government. RI. New government cannot be formed immediately. RII. The country cannot run without a government.

A. Only RI and not RII is the reason for the assertion.
B. only RII and not RI is the reason for the assertion.
C. either RI or RII, but not both, is the reason for the assertion.
D. both RI and RII are the reason for the assertion.
Answer» E.
99.

Assertion (A) : Safety fuses are made up of materials having a high melting point. Reason (R) : Safety fuses should be resistant to electric current.

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.
Answer» E.
100.

Assertion: Computer coaching centres are mushrooming all over India. RI. Other than computer education, no other education is useful these days. RII. People are opting for computer education in a big way.

A. Only RI and not RII is the reason for the assertion.
B. only RII and not RI is the reason for the assertion.
C. either RI or RII, but not both, is the reason for the assertion.
D. neither RI nor RII is the reason for the assertion.
Answer» C. either RI or RII, but not both, is the reason for the assertion.