726: Assertion (A) : A jet aircraft moving at Mach Number equal to 1 travels faster at an altitude of 15 km than while moving at mach number equal to 1 near the sea level.
Reason (R) : the velocity of sound depends on the temperature of the surrounding medium.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually 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
727: Consider the following which can be found in the ambient atmosphere:
1. Soot
2. Sulphur hexafluoride
3. Water vapour
Which of the above contribute to the warming up of the atmosphere ?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
728: Consider the following diseases :
1. Diphtheria
2. Chickenpox
3. Smallpox
Which of the above diseases has/ havebeen eradicated in India?
(a) 1 and 2 only
(b) 3 only
(c) 1, 2 and 3
(d) None
729: Shivaji was coronated at:
(a) Raigarh
(b) Aurangabad
(c) Peshawar
(d) Bundela
730: In the year 2001, India offered a grant of five million dollars to Tajikistan to
(a) tackle the drought situation
(b) set up a software Technology Park
(c) promote mineral exploration
(d) procure defence equipment