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Chemistry

Chemistry
Which of the following gases will effuse out of football bladder most quickly ?

N 2
O2
H2
He

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Chemistry
The gas that causes suffocation and death when coal or coke is burnt in a closed room is

Ethane
Carbon di-oxide
Carbon monoxide
Methane

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Chemistry
The mass number of an atom is equal to

the number of protons and electrons
the number of nucleons
the number of neutrons
the number of protons

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Chemistry
Trinitrotoluene is

Used to melt metals
Used as an abrasive
Used as an explosive
Used to fuse two metals

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Chemistry
Sodium Carbonate is commonly known as

Caustic Soda
Washing Soda
Caustic Potash
Baking Soda

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Chemistry
Conversion of chemical energy into electrical energy occurs in

Electric heaters
A battery
Atomic bombs
Dynamo

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