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Chemistry

Chemistry
Which one of the following does not contain Silver ?

German Silver
Ruby Silver
Lunar Caustic
Horn Silver

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Chemistry
Soap helps in better cleaning of clothes because

It gives strength to solution
It absorbs the dirt
Soap acts like catalyst
It reduces the surface tension of solution

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Chemistry
Which one out of the following helps in burning ?

Carbon dioxide
Carbon monoxide
Nitrogen
Oxygen

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Chemistry
Of the following compounds of calcium, the one having highest covalent character is

CaF2
Cal2
CaBr2
Cacl2

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Chemistry
24 carat of diamond is equal to

200 g
95% mg
91% gold
200 mg

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Chemistry
Cooking gas is a mixture of

Carbon monoxide and carbon dioxide
Methane and ethylene
Carbon dioxide and oxygen
Butane and propane

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