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Which of the following is necessary for a substance to burn?

1. A gasoline
2. B hydrogen
3. C light
4. D oxygen

Which of the following is the most toxic gas?

1. A carbon dioxide
2. B carbon monoxide
3. C hydrogen
4. D nitrogen

On burning charcoal which of the following gases is produced?

1. A carbon dioxide
2. B hydrogen
3. C nitrous oxide
4. D oxygen

Where is the sea of Tranquility?

1. A In the atlantic ocean
2. B In the pacific ocean
3. C Near the bermuda triangle
4. D On the moon

Which one of the following serves as host tree for silkworm to produce good silk?

1. A banyan tree
2. B chrysanthemum
3. C hibiscus
4. D mulberry

Eskimos hunt using a dog-driven vehicle called:

1. A Bus
2. B Cart
3. C Sledge
4. D Snow cart

Which among the following is a natural polymer?

1. A plastic
2. B polyester
3. C rubber
4. D terylene

What is the name given to molten rocks that are erupted by a volcano?

1. A firestone
2. B lava
3. C marble
4. D slate

With which device are earthquakes recorded?

1. A Barometer
2. B Oscillator
3. C Seismograph
4. D Voltmeter

The Sun is a--

1. A Asteriod
2. B None of the above
3. C Planet
4. D Star

In tritinum, electrons, protons and neutrons are present in the ratio of--

1. A 1 : 1 : 0
2. B 1 : 1 : 1
3. C 1 : 1 : 2
4. D 1 : 2 : 1

Dry ice is--

1. A any frozen liquid
2. B ice with salt added
3. C solid carbon dioxide
4. D very cold ice