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Chemistry

Chemistry
White lung cancer' is caused by

Silica
Asbestos
Paper
Textiles

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Chemistry
When a spoon is to be electroplated with nickel the spoon is

Dipped in a nickel sulphate solution
Made cathode and a pure nickel red, the anode
Coated with nickel sulphate and dried
Made anode and a pure nickel rod, the cathode

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Chemistry
The element used for making solar cells is

Silicon
Calcium
Magnesium
Sodium

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Chemistry
A matured mammalian cell without nucleus is

Erythrocyte
Spermatozoan
Lymphocyte
Oocyte

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Chemistry
Sea water is saltier than rain water because

Rivers wash away salts from earth and pour them into the sea
The air around the sea is saltish
Sea animals are salt producing
Sea beds have salt producing mines

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Chemistry
Which type of fire extinguisher is used for petroleum fire ?

None of these
Foam type
Powder type
Soda acid type

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