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Chemistry

Chemistry
The apparatus used to test acidity of aqueous solution is

Acidmeter
PH meter
Ammeter
Hygrometer

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Chemistry
The substance which does not expand on going from liquid state to solid state is

Water
Cast-iron
Type metal
Aluminium

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Chemistry
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

magnetic separation
leaching
levigation
liquation

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Chemistry
Which of the following is not a donor atom?

Aluminium
Arsenic
Phosphorus
Antimony

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Chemistry
The depletion of Ozone layer is mainly due to

Radioactive rays
Chlorofluorocarbons
Volcanic eruptions
Aviation fuels

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Chemistry
Food cans are coated with tin and not with zinc because

Zinc is more reactive than tin
Zinc is less reactive than tin
Zinc has a higher melting point than tin
Zinc is costlier than tin

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