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Chemistry

Chemistry
The coloured discharge tubes for advertisement mainly contain

Helium
Xenon
Argon
Neon

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Chemistry
Philosopher’s wool is chemically

Magnesium oxide
Zinc oxide
Calcium oxide
Aluminium oxide

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Chemistry
Black lung disease occurs in people working in

Electroplating industry
Coal mines
Paint manufacturing industry
Organic solvents industry

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Chemistry
Sulphur dioxide present in the industrial chimney exhaust causes

Respiratory and lung disease
All of these
Reduction in plant's productivity owing to acid rain
Corrosion building materials

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Chemistry
Which of the following is not a derivative of barbituric acid

Nembutal
Equanil
Amytal
Veronal

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Chemistry
Dry powder fire extinguishers contain

Sand
Sand and sodium bicarbonate
Sand and sodium carbonate
Sand and potassium carbonate

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