2111: A rectangular water tank measures 15 m x 6 m at top and is 10 m deep. It is full of water. If water is drawn out lowering the level by 1 metre, how much of water has been drawn out ?
(a) 45,000 litres
(b) 90,000 litres
(c) 4,500 litres
(d) 900 litres
2112: When water is heated from zero Degree Celsius to Ten Degree Celsius, its volume
(a) increases
(b) decreases
(c) does not change
(d) first decreases and then increases
2113: Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?
(a) Hydrogen and oxygen
(b) Oxygen and acetylene
(c) Methane and air
(d) Carbon dioxide and methane
2114: Consider the following pairs:
Terms sometimes seen in the news : Their origin
1. Annex Countries : Cartagena Protocol
2. Certified Emissions Reductions : Nagoya Protocol
3. Clean Development Mechanism : Kyoto Protocol
Which of the pairs given above is/are correctly matched?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
2115: Where is Bundala Bioshpere Reserve which has been recently added to the UNESCO's Man and Biosphere (MAB) network, located?
(a) Russia
(b) Bangladesh
(c) India
(d) Sri Lanka