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Chemistry

Chemistry
Which of the following alkali metals has highest specific heat?

Potassium
Rubidium
Caesium
Lithium

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Chemistry
Main source of lead pollution is from

Leaded gasoline
Insecticides
Sewage
Tobacco

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Chemistry
Milk is a colloidal system in which:

Fat and water are dispersed in each other
Fat is dissolved
Fat is dispersed in water
Water is dispersed in fat

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Chemistry
Which of the following is used for refrigeration?

Chlorine
Freon
Sulphur dioxide
Phosphine

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Chemistry
Oxygen has (+) oxidation number only in

H2O (2)
C12O
OF2
N2O

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Chemistry
The acid which fails to liberate carbon dioxide from sodium bicarbonate is :

Carbonic acid
Sulphuric acid
Acetic acid
Formic acid

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