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Chemistry

Chemistry
When cathode rays strike a target of high atomic weight, they give rise to

?-rays
Positive rays
X-rays
? and ? rays

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Chemistry
Particulates (< 1 µm size) remaining suspended in air indefinitely and transported by wind currents are called

Fumes
Smoke
Aerosols
Mists

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Chemistry
Of the following compounds of calcium, the one having highest covalent character is

CaF2
Cal2
CaBr2
Cacl2

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Chemistry
The addition of gypsum to portland cement helps in :

Reduction in the cost of cement
Preventing rapid setting of cement
Increasing the strength of cement
Rapid setting of cement

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Chemistry
Sea water can be purified by the process of

Filtration
Fractional distillation
Distillation
Evaporation

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Chemistry
The material used in the manufacture of lead pencil is

Mica
Graphite
Lead
Carbon

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MORE MCQ ON Chemistry

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