Assertion and Reason – Practice Questions

DIRECTIONS for the question 1 to 20: In each of the questions given below, there are two statements marked as Assertion (A) and Reason (R). Mark your answer as per the codes provided below:
  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
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  1. Assertion (A): When lightning strikes, the sound is heard a little after the flash is seen.
    Reason (R): The velocity of light is greater than that of the sound.
  2. Assertion (A): A ship rises as it enters the sea from a river.
    Reason (R): The density of sea water is higher as compared to river water.
  3. Assertion (A): Indian President is the head of the State.
    Reason (R): Indian Parliament consists of the President, Lok Sabha and Rajya Sabha.
  4. Assertion (A): The British sovereignty continued to exist in f India.
    Reason (R): The British sovereign appointed the last Governor-General of free India
  5. Assertion (A): Sprouting should not be done before consuming the grains.
    Reason (R): Sprouting kills many vital vitamins.
  6. Assertion (R): Alcohol rather than mercury is used in a thermometer to measure a temperature of 60oC.
    Reason (R): Alcohol has a lower freezing point than mercury.
  7. Assertion (A): Pipes carrying water often burst in cold countries during severe winter.
    Reason (R): Water expands on freezing.
  8. Assertion (A): An electric bulb makes a 'bang' when it is broken.
    Reason (R): The air inside the bulb rushes out immediately on breaking.
  9. Assertion (A): Salt is an ingredient used to cook food at higher altitudes.
    Reason (R):  Temperature is lower at higher altitudes.
  10. Assertion (A): Carbon monoxide when inhaled causes death.
    Reason (R): Carbon monoxide combines with hemoglobin.
  11. Assertion (A): It's colder on mountains than it is on plains.
    Reason (R): When altitude decreases, so does the temperature.
  12. Assertion (A): Inside the earth metals are present in molten state.
    Reason (R): Earth absorbs the sun's rays.
  13. Assertion (A): AIDS does not have a vaccine.
    Reason (R): The AIDS virus alters its genetic code.
  14. Assertion (A): Clothes are not washed properly in hot water.
    Reason (R): Hard water contains many minerals.
  15. Assertion (A): In India, females have higher life expectancy than the males.
    Reason (R): Females receive a better diet.
  16. Assertion (A): On 26th January, 1950, the Indian Constitution came into force.
    Reason (R): 26th January is celebrated as the Republic Day.
  17. Assertion (A): Appendix is a vestigial organ in human body.
    Reason (R): It does not participate in digestion.
  18. Assertion (A): Himalayas used to lay under the sea.
    Reason (R): Fossils of various marine creatures are traced on the Himalayas.
  19. Assertion (A): Shivaji developed the guerilla Warfare.
    Reason (R): Shivaji feared the Mughals.
  20. Assertion (A): Legumes revive the soil fertility.
    Reason (R): Microbes in the root nodules of legumes fix the atmospheric nitrogen.
DIRECTIONS for questions 21 to 40: In each of the questions given below, there are two statements labeled as Assertion (A) and Reason (R). Mark your answer as per the number codes provided below:
  1. Both A and R are true. R is the correct explanation of A.
  2. Both A and R are true but R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
  1. Assertion (A): In winters, people prefer wearing white clothes.
    Reason (R): White clothes are great reflectors of heat.
  2. Assertion (A): In India, people elect-4heir own representatives.
    Reason (R): India is a democracy.
  3. Assertion (A): Vaccines prevent diseases.
    Reason (R): Vaccines must be given to children.
  4. Assertion (A): Downpour of rain helps lessen the humidity in the atmosphere.
    Reason (R): Rains are caused when atmosphere cannot hold more moisture.
  5. Assertion (A): Unpolished rice should be eaten.
    Reason (R): Polished rice lacks Vitamin B.
  6. Assertion (A): Bats possess the ability to fly at night.
    Reason (R): Bats emit ultrasonics.
  7. Assertion (A): Iltutmish's daughter was Razia Sultan.
    Reason (R): Iltutmish was a rebel.
  8. Assertion (A): Silver is not used in making electric wires.
    Reason (R): Silver is a poor conductor.
  9. Assertion (A): Gandhiji withdrew the non-cooperation movement.
    Reason (R): There was violence at the Chauri Chaura outrage.
  10. Assertion (A): Carbon forms the largest number of compounds.
    Reason (R): Carbon has the catenation property
  11. Assertion (A): Uttar Pradesh is termed as the 'Sugar Bowl' of India.
    Reason (R): Uttar Pradesh is the leading producer of sugarcane.
  12. Assertion (A): When the bus starts, the person inside it falls forward.
    Reason (R): The bus pushes the man forward.
  13. Assertion (A): In winter, a Glass tumbler breaks when hot water is poured in it.
    Reason (R): The outer surface of glass expands when hot water is poured into it.
  14. Assertion (A): The blood is red due to the presence of haemoglobin.
    Reason (R): Haemoglobin is a red pigment.
  15. Assertion (A): Carbohydrates provide energy to the body.
    Reason (R): Excessive intake of carbohydrates causes obesity.
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  17. Assertion (A): A rainbow forms in the sky only after rains.
    Reason (R): Water drops suspended in the air break up sun's rays into seven colours.
  18. Assertion (A): Nuclear fusion is used to generate electricity.
    Reason (R): Nuclear power is not used because it cannot be controlled.
  19. Assertion (A): River Narmada flows towards in the western direction.
    Reason (R): Narmada falls into the Bay of Bengali.
  20. Assertion (A): Cotton is grown in alluvial soils.
    Reason (R): Alluvial soils are very fertile.
  21. Assertion (A): India has a tropical monsoon type climate.
    Reason (R): India is located exactly between the tropical latitudes.
  1. 1    R provides the correct reason for A.
  2. 1    Due to higher density of sea water, the upthrust produced by the sea water on the ship is greater as compared to that produced by river water.
  3. 2    Both A and R are true. Indian President is the constitutional or titular head of the executive, the real power being vested in the Council of Ministers.
  4. 4    India drafted its own Constitution and formed its own government after gaining independence. So, A is false. But R is true.
  5. 2    Diamond is hard due to its rigid three dimensional structure and so, it is used for cutting glass Refractive inbox of diamond is high and this gives is greater transparency and brilliance.
  6. 1    Mercury freezes at - 39°C, while alcohol freezes at a point far below - 100o C. So, alcohol is used to measure lower temperatures. Similarly, mercury boils at 357oC, while alcohol boils at 78°C. So, mercury is used to measure high temperatures.
  7. 1    During severe winters, water in the pipes freezes to ice and expands, resulting in bursting of pipes.
  8. 3    There is a vacuum inside the electric bulb. When the bulb breaks, air rushes in at great speed from all sides to fill the vacuum, thus producing a 'bang'.
  9. 2    Due to decrease in pressure at higher altitudes, water boils much below 100oC so that the food does not get sufficient heat for being cooked. Salt increases the bed point of water.
  10. 1    Carbon monoxide, when inhaled, combines with haemoglobin of blood to form carboxy- haemoglobin which inhibits the transport of oxygen.
  11. 1    Higher above the sea level, temperature decreases at the rate of 1°C for every 165 metres of ascent making mountain peaks colder.
  12. 3    Inside the earth, the high temperature and pressure keep metals molten. The earth reflects the sun's rays rather than absorbing them.
  13. 1    A vaccine contains the inactivated germs of the disease. But the AIDS virus changes its genetic code and so no vaccine has been invented for it.
  14. 2     In hard water, clothes do not get washed properly because hard water doesn't form lather with soap. Having said that, hard water does contains many minerals.
  15. 5    In India, due to high birth rate and due to neglect, females have a lower life expectancy as compared to males and although females need a better diet, they do not receive
  16. 2    The Indian Constitution came into force with effect from January 26, 1950 and since then this day is celebrated as the Republic Day.
  17. 1    Appendix, an organ that once aided in the digestion of raw vegetable matter, is now considered a functionless organ in human body.
  18. 1    Himalayas are the young fold mountains that at one time are believed to lie inside the Tethys Sea. This is evident from the recovery of fossils of marine creatures on its peaks.
  19. 3    Although Shivaji  initiated the guerilla warfare to defeat the Mughals, he did not fear them.
  20. 1    The root nodules of leguminous plants contain nitrogen fixing bacteria which absorb the atomspheric nitrogen and convert it into nitrogenous compounds useful for the plants reviving soil fertility.
  21. 4    We prefer to wear dark clothes in winter because they absorb the heat and keep the body warm. However, while clothes are good reflectors of heat and are worn in summer.
  22. 2    India, being a democracy, it is a government run by the representatives elected by its people.
  23. 2    To develop immunity inside one's body, Vaccines are given since they fend off diseases.  Children must take them to build immunity within their body.
  24. 4    Rains are caused when the atmosphere in upper reaches cannot hold more water. But the downpour of rain increases the humidity in the atmosphere near the earth's surface.
  25. 1    The husk of unpolished rice contains Vitamin Bl, deficiency of which causes the disease Beri-beri. So, rice should be eaten unpolished.
  26. 1    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.
  27. 3    Iltutmish was a ruler of slave dynasty and Razia was his daughter.
  28. 3    Although a good conductor of electricity, silver is not used to make electric wires because it is expensive.
  29. 1    Gandhiji withdrew the non-cooperation movement because of the violence in the Chauri Chaura outrage.
  30. 4    Carbon's ability to forms chains and rings of varying sizes helps make a very large number of compounds. This property of Carbon is called catenation property. However, the largest number of compounds are formed by hydrogen.
  31. 1    Uttar Pradesh, being the leading producer of sugarcane in India, is called the 'Sugar Bowl' of India.
  32. 5    The person inside a bus falls backward because when the bus starts the bus since it moves forward however due to the property of inertia, the man tends to be in the initial state of rest.
  33. 3    When in winter, hot water is poured in the glass tumbler, its inner surface tends to expand while the outer surface in contact with cold atmosphere does not. This opposite interaction causes the tumbler to break
  34. 1    Haemoglobin is the blood pigment that imparts red colour to the blood.
  35. 3    Carbohydrates are the source of energy in the body. However, obesity is the product of excessive intake of fats that accumulate in the body.
  36. 1    Water droplets act like prisms. The sun's rays fall on water droplets, faces dispersion, and produces a spectrum.
  37. 5    A controlled nuclear fission reaction is used to generate electricity. Nowadays, controlled nuclear power finds many important applications.
  38. 3    River Narmada flows westward and drains into Arabian sea.
  39. 4    Alluvial soils comprising of silt and sand carried down by the rivers, are very fertile. However, cotton is grown in black soil that suits its mineral requirements.
  40. 3    India has a tropical monsoon type climate owing to its geographical relief. Only the lower half of India lies amidst tropical latitudes, as the Tropic of Cancer passes through its centre.
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