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Chemistry

Chemistry
Catalytic converters are generally made from :

Transition metals
Hydrogen
Alkaline metals
Carbon

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Chemistry
Spontaneous change is one in there is:

A lowering of entropy
A lowering of free energy
Increase in free energy
An increase in Internal energy

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

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

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Chemistry
During fermentation of sugar, the compound which is always formed is :

Ethyl Alcohol
Ethylene
Methyl Alcohol
Acetic Acid

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Chemistry
Which of the following is also used as a Bio fertilizer?

None of these
Urea
Ammonia
Uric Acid

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Chemistry
Two elements which can form a large number of compounds are

Carbon and Oxygen
Carbon and Sulphur
Carbon and Nitrogen
Carbon and Hydrogen

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