Questions

The city Chandigarh, being a union territory is the capital city of both Haryana and Punjab. As it is a union territory it is ruled directly by the central government and not by either states.

Echolocation is an adaptation bats use to hunt insects in flight, locate flowering plants and find warm places for hibernation.

According to a Report by analyst firm Canalys, India has become the second largest smartphone market in the world.

Black  surfaces are good emitters of heat ( They are also good absorbers of heat). If the black surface is rough too, the emitting will be better. So (b) is the correct answer. Shining surfaces reflect back radiation. So if the black surface is also shining the effectiveness of emitting heat is lessened.

By trial and error method,

P=0, Q=9, R=0 satisfies the values.