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Chemistry

Chemistry
The gas used in the manufacture of vanaspati from vegetable oil is

hydrogen
nitrogen
carbon dioxide
oxygen

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Chemistry
Which one element from below list is liquid at room temperature

Argon
Zinc
Lead
Bromine

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Chemistry
Which of the following vitamins is generally excreted by human in urine?

None of these
Vitamin C
Vitamin B
Vitamin D

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

Glucose isomerase
Mild sulphuric acid
Hydrogen peroxide
Iodine and water

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Chemistry
Nitrification is the biological process of converting

Ammonia into nitrite
Ammonia into N2
N2 into nitrate
N2into nitrite

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Chemistry
Major portion of the earth’s crust is mainly constituted by

Oxygen and Silicon
Oxygen and Iron
Silicon and Iron
Silicon and Aluminium

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