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461. Given below are two statements, labelled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : The flash of lightning is seen before the sound of thunder is heared.Reason (R) : The sound of thunder is produced after the flash of lightning.
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.
Explanation:
462. Given below are two statements, labelled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : Helium is chemically an inert element.Reason (R) : Helium has its outer shell fully empty.
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.
Explanation:
463. Domestic insects are controlled by
A. Microwave
B. Subsonic
C. Ultrasonic
D. Low frequency radiowave
Explanation:
464. Given below are two statements, labelled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : Red light is generally used as a caution symbol.Reason (R) : It has a longer wave length.
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.
Explanation:
465. Given below are two statements, labelled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : Most of the time individual rain drops hit the earths surface with constant velocities.Reason (R) : When an object falls through a viscous fluid, it attains a constant terminal velocity after sometime.
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.
Explanation:
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