1. Which among the following are generally used in the absorption refrigerators used in warehouses?
[A]Ammonia and Hydrogen
[B]Ammonia and Hydrofluorocarbon
[C]Hydrofluorocarbon
[D]Hydrochlorofluorocarbon
2. Which of the following can be used to absorb neutrons to control the chain reaction during nuclear fission?
[A]Boron
[B]Plutonium
[C]Uranium
[D]Heavy Water
3. Troposphere is the hottest part of the atmosphere because _________________________________.
[A]It is heated by the earth's surface
[B]Heat is generated in it
[C]It is closest to the sun
[D]There are charged particles in it
4. Which dried flower buds are used as spice?
[A]Cloves
[B]Cardamom
[C]Cinnamon
[D]Saffron
5. Which of the following are warm blood animals?
[A]Whales
[B]Draco
[C]Alytes
[D]Sharks
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