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Chemistry

Chemistry
A pungent smell often present near the urinals is due to

Sulphur-di- oxide
Chlorine
Urea
Ammonia

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Chemistry
Which one of the following is commonly used for pulp bleaching in the paper industry?

Mild sulphuric acid
Iodine and water
Hydrogen peroxide
Glucose isomerase

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Chemistry
Nitrogen fixation is a process of

Utilisation of nitrogen gas
Conversion of molecular nitrogen to ammonia
Assimilation of nitrate
Conversion of organic nitrogen to proteins

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Chemistry
Urea is a

Nitrogenous fertilizer
Potassium fertilizer
Phosphatic fertilizer
Sodium fertilizer

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Chemistry
The function of skimming tank in sewage treatment is to remove

Oil and fatty substances
Suspended solids
Gritty substances
Inorganic substances

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Chemistry
Which of the following is not a nucleon?

Neutron
Proton
Positron
Electron

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