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Chemistry

Chemistry
Cinnabar is an ore/mineral of

Lead
Molybdenum
Manganese
Mercury

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Chemistry
Helium is added to the oxygen supply of deep sea divers because it is

Readily miscible with oxygen
Less soluble in blood than nitrogen at high pressure
Lighter than nitrogen
Less poisonous than nitrogen

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Chemistry
Electric bulbs are filled with :

Argon
Carbon dioxide
Oxygen
Nitrogen

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Chemistry
Bleaching powder is prepared by passing :

Carbon dioxide over slaked lime
Chlorine over quick lirne
Chlorine over slaked lime
Oxygen over slaked lime

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Chemistry
Which one of the following contains maximum percentage of carbon ?

Wrought iron
High speed steel
Stainless steel
Cast iron

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Chemistry
In its reaction with silver nitrate, C2H2 shows

Acidic property
Oxidising property
Reducing property
Basic property

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