2771: The water pollution in river is measured by the dissolved amount of
(a) Chlorine
(b) Ozone
(c) Nitrogen
(d) Oxygen
2772: Cover of a solar cooker is made of glass. Why ?
(a) It absorbs sun rays
(b) It reflects sun rays
(c) Sun heat is transmitted through glass without much absorption
(d) None of these
2773: A small wooden block is floating in a tub of water. The water is gradually heated. The volume of the wooden block visible above the water level:
(a) Increases
(b) Decreases
(c) Fluctuates
(d) Remains the same
2774: In which of the following regions of India are you most likely to come across the 'Great Indian Hornbill' in its natural habitat?
(a) Sand deserts of northwest India
(b) Higher Himalayas of Jammu and Kashmir
(c) Salt marshes of western Gujarat
(d) Western Ghats
2775: World's longest ruling head of government is from:
(a) Switzerland
(b) Cuba
(c) Zimbabwe
(d) New Zealand