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Chemistry

Chemistry
The element used for making solar cells is

Magnesium
Sodium
Silicon
Calcium

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Chemistry
Alum is used as

An analgesic
A disinfectant
A purifier for water
A fertilizer

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Chemistry
Sour milk contains

Citric acid
Acetic acid
Lactic acid
Tartaric acid

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Chemistry
If lime water is kept in the air, it turns milky due to presence of :

Sulphurdioxide
Nitrogen
Oxygen
Carbondioxide

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Chemistry
The main buffer system of the human blood is

H2CO3 - CO32-
NH2CONH2 - NH2CONH+
CH3COOH - CH3COO-
H2CO3 - HCO3

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Chemistry
The strongest oxidizing agent among the following is:

Fluorine
Oxygen
Chlorine
Iodine

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MORE MCQ ON Chemistry

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