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Chemistry

Chemistry
Which among the following elements is found in maximum percentage in the human body ?

Carbon
Hydrogen
Oxyzen
Nitrozen

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Chemistry
The octane number of zero is assigned to

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

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Chemistry
A balloon filled with helium rises in air because

The balloon is weightless
Helium pushes down on the air below the balloon
Air exerts an upward force on the balloon
Helium is less dense than air

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Chemistry
The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of

periodic table of contents
discovery of elements
metallurgy
atomic structure

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Chemistry
Aspirin is common name of

Salicylic Acid
Salicylate
Methyl Salicylate
Acetyl Salicylic Acid

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Chemistry
An emulsion is a colloidal solution of

Solid in liquid
Gas in solid
Liquid in liquid
Solid in Solid

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