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General Chemistry MCQ Question with Answer

General Chemistry MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 29
The substance preserved under water is

potassium
sodium
red phosphorus
white phosphorus

Question No : 30
The metal which reacts most violently with cold water is

calcium
sodium
magnesium
potassium

Question No : 31
Clark's method for removal of temporary hardness in water uses

calcium hydroxide
washing soda
calcium chloride
zeolite

Question No : 32
Suspended impurities in water are effectively removed by

adding milk of lime
filtering through sand
adding filter alum
chlorination

Question No : 33
Heavy water was discovered by

TW Richards
FW Aston
Stas
Urey

Question No : 34
White vitriol is

ZnSO4 . 7H2O
FeSO4 . 7H2O
MgSO4 . 7H2O
CaSO4 . 2H2O

Question No : 35
The human body contains about

50% water
10% water
70% water
20% water