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Chemistry

Chemistry
The nuclear particle having no mass and no charge, but only spin is

Electron
Neutrino
Meson
Proton

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Chemistry
Which one of the following is also known as solution ?

A heterogeneous mixture
A homogeneous mixture
A suspension
A compound

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Chemistry
Total number of halogen elements found in the periodic table is

5
13
3
8

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Chemistry
Which of the following is not present in RNA

Thymine
Phosphate
Ribose
Uracil

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Chemistry
Air is said to be saturated when :

Its thickness is maximum
It blows over the barren land
It contains maximum content of water vapour
Its pressure is minimum

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Chemistry
What is the element that is in the highest percentage in the composition of the earth ?

Iron
Oxygen
Magnesium
Silicon

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