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Chemistry

Chemistry
Which among the following is a carbohydrate ?

Nylon
Hydrogen peroxide
Cane-sugar
Turpentine

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Chemistry
What is the principal ore of aluminium ?

Lignite
Bauxite
Dolomite
Copper

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Chemistry
Which of the following is caused by the higher concentration of Nitrogen and Phosphorous ?

Acidity
Alkalinity
Hardness
Eutrophication

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

Vitamin D
Vitamin B
Vitamin C
None of these

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Chemistry
Formation of ozone hole is maximum over

India
Africa
Antarctica
Europe

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Chemistry
In arc welding, Argon is used because of its

Low reactivity with metal
High flammability
Ability to lower the melting point of the metal
High calorific value

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