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Chemistry

Chemistry
Atoms of same element having different mass numbers are called________

Isomers
Isotopes
Isotones
Isobars

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Chemistry
In vulcanisation process, rubber can be hardened by adding

Silicon
Alcohol
Sulphur
Nitrogen

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Chemistry
The purest form of water is

Distilled water
Rain water
Ground water
Tap water

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Chemistry
Acid rain is caused by

SO2 and NO2
CO2and CFCs
NO2and particulates
SO2 and particulates

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Chemistry
The gas that is used in the manufacture of vanaspati ghee is :

Nitrogen
Hydrogen
Oxygen
Carbon dioxide

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Chemistry
Atomic number is the number equal to

None of these
Electrons
Protons
Neutrons

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