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Chemistry

Chemistry
Which one of the following is most acidic

CaO
Al22O3
Na2O
MgO

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Chemistry
Which one of the following elements is used in the manufacture of safety matches?

Phosphorus
Sodium
Silicon
Graphite

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Chemistry
Cyanide poisoning causes death in seconds because

It breaks the electron transport chain
It denatures enzymes of the heart/muscle
It causes Lysis of red blood cells
It causes cardiac arrest

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Chemistry
1 carat of diamond is equal to

100 g
100 mg
200 g
200 mg

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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
Bhopal gas tragedy is associated with leakage of

Methyl isocyanate
Carbon dioxide
Sulphur dioxide
Nitrogen dioxide

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