Reasoning - Assertion and Reason
Directions to solve :
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 R are false.
In each of the following questions, there are two statements labelled as A (Assertion) and R (Reason). Mark your answers as per codes given below :
A. - Both A and R are true and R correctly explains 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 R are false.
11.
A : Plaster of Paris is used by doctors for setting fractured bones.
R : When Plaster of Paris is mixed with water and applied around the fractured limbs, it sets into a hard mass.
Answer
Plaster of Paris when mixed with water applied around the fractured limbs, it sets into a hard mass and keeps the bone joints in a fixed position.
So, it can be used for setting fractured bones.
Answer :
Option AExplanation :
Plaster of Paris when mixed with water applied around the fractured limbs, it sets into a hard mass and keeps the bone joints in a fixed position.
So, it can be used for setting fractured bones.
12.
A : Cotton is grown in alluvial soils.
R : Alluvial soils are very fertile.
Answer
Cotton is grown in black soil. R is true.
Answer :
Option DExplanation :
Cotton is grown in black soil. R is true.
13.
A : DDT has nowadays lost its use as an insecticide.
R : DDT is harmful to man.
Answer
DDT has lost its use as an insecticide because insects have developed immunity against it. However it is true that DDT is harmful to man.
Answer :
Option BExplanation :
DDT has lost its use as an insecticide because insects have developed immunity against it. However it is true that DDT is harmful to man.
14.
A : An electric bulb makes a 'bang' when it is broken.
R : The air inside the bulb rushes out immediately on breaking.
Answer
There is a vaccum inside the electric bulb. When the bulb breaks, air rushes in at a great speed from all sides to fill the vaccum, thus producing a bang.
Answer :
Option CExplanation :
There is a vaccum inside the electric bulb. When the bulb breaks, air rushes in at a great speed from all sides to fill the vaccum, thus producing a bang.
15.
A : Beri-beri is a viral infection.
R : Vitamin deficiency causes diseases.
Answer
Beri-Beri is caused by deficiency of Viamin B1 but it is not a viral infection.
Answer :
Option DExplanation :
Beri-Beri is caused by deficiency of Viamin B1 but it is not a viral infection.
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