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Chemistry

Chemistry
0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by

3
7
4
6

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Chemistry
Sulphur dioxide bleaches colouring matter by :

Oxidation
Dehydration
Decomposition
Reduction

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Chemistry
Which of the following is ozone depleting pesticide ?

Methyl bromide
Ethylene ozonide
D.T.
Benzene

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Chemistry
The heaviest naturally occurring element is:

Thorium
Mercury
Polonium
Uranium

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Chemistry
Which metal is extracted from sea water?

Aluminium
Magnesium
Potassium
Beryllium

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Chemistry
Setting of plaster of paris involves

Hydration to form other hydrates
Reduction process
Oxidation process
Dehydration process

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