Assertions and Reasons Questions and answers

  1. General Science
    1. Assertions and Reasons
    2. Biology
    3. Chemistry
    4. Physics
    5. Inventions
51). Assertion (A) : Osmosis is a process in which a solvent moves from a dilute solution to a more concentrated one across a semipermeable membrane.
Reason (R ) : Osmosis continues till the concentrations of the solution on both sides of the membrane become equal.

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.
52). Assertion (A) : Fingerprints of criminals have certain special features.
Reason (R ) : No two persons have the same fingerprint patterns.

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.
53). Assertion (A) : Starch is produced by green plants in the presence of sunlight.
Reason (R ) : Chlorophyll is essential for food synthesis in plants.

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.
54). Assertion (A) : A space shuttle loses radio contact with ground stations for a while during landing.
Reason (R ) : As a space shuttle enters earth's atmosphere the shuttle's surface temperature increases, ionising the surrounding air.

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.
55). Assertion (A) : Nitrogen is increasing in the atmosphere.
Reason (R ) : Plants need nitrogen for their growth.

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.


56). Assertion (A) : Coloured objects fade when exposed to sunlight.
Reason (R ) : The ultraviolet part of sunlight alters the arrangement of electrons in the molecules of the object.

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.
57). Assertion (A) : A bit of detergent on the inside of a windscreen of a car will avoid fogging.
Reason (R ) : Detergent reduces the angle of contact between the glass and 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). A is false but R is true.
58). Assertion (A) : Sodium and chlorine are both poisonous elements but sodium chloride is a part of our regular diet.
Reason (R ) : The elements of a compound cannot be separated by any physical means.

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.
59). Assertion (A) : Currents about 0.1 A passing through the human body prove fatal.
Reason (R ) : A large current causes burns to the body.

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.
60). Assertion (A) : Mirrors used in searchlights are concave spherical.
Reason (R ) : For searchlight, a parallel beam of light is required.

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.
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