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Chemistry

Chemistry
Molasses a by-product in the manufacture of sugar, is converted into

Fuel
Paper
Pulp
Alcohol

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Chemistry
Spontaneous change is one in there is:

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

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Chemistry
The absolute temperature of a gas is doubled and the pressure is reduced to half, the volume of the gas

Will increase four-fold
Remains unchanged
Will be doubled
Will be reduced to half

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Chemistry
The three elements most needed in common fertilisers are :

Phosphorous, Sodium and Nitrogen
Calcium, Phosphorous and Potassium
Sulphur, Phosphorous and Sodium
Nitrogen, Potassium and Phosphorous

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Chemistry
What is the atomic number of Oxygen

12
5
22
8

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Chemistry
What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper ?

There is a crackling sound
There is no reaction.
The paper ignites
There is a violent explosion.

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