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Chemistry

Chemistry
The highest volume of gases in lower atmosphere is comprised of

Carbon dioxide
Oxygen
Hydrogen
Nitrogen

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Chemistry
The molecule which has the highest percentage of ionic character among the following is

HI
HF
HCI
HBr

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Chemistry
The degree of dissociation of an electrolyte depends on

Method of dissolution
Dilution
Atmospheric pressure
Impurities

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Chemistry
The green colour seen in firework displays is due to the chloride salt of :

Calcium
Barium
Strontium
Sodium

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Chemistry
The octane number of zero is assigned to

2-methyl octane
3-methyl octane
iso-octane
n-heptane

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Chemistry
Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water

Manganese
Calcium
Magnesium
None of these

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MORE MCQ ON Chemistry

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