set 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 2 EXERCISES
The following question based on some important man made materials topic of general science mcq
(a) calcium silicate
(b) sodium borate
(c) silica
(d) sodium silicate
The correct answers to the above question in:
Answer: (c)
The major component used in the preparation of different types of glasses is silica.
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Question : 1
The principle of cleaning by soap is
a) viscosity
b) floatation
c) surface tension
d) elasticity
Answer »Answer: (c)
Soaps form surface films, reduce surface tension of solution and help in removing dirt and dust by emulsifying grease.
Question : 2
The aqueous solution of one of the following vitamins is dark in colour
a) B6
b) B2
c) B1
d) B12
Answer »Answer: (d)
The aqueous solution of vitamin B12 is dark in colour.
Question : 3
The property of plasticity is shown by clay , when it is
a) dried at room temperature after kneading
b) heated strongly
c) mixed with proper proportion of water
d) glazed
Answer »Answer: (c)
Question : 4
Which one of the following is a vitamin?
a) Oxalic acid
b) Ascorbic acid
c) Benzoic acid
d) Formic acid
Answer »Answer: (b)
Vitamin C is chemically ascorbic acid.
Question : 5
Which one of the following contains cobalt ?
a) Vitamin A
b) Vitamin B12
c) Riboflavin
d) Vitamin B6
Answer »Answer: (b)
Vitamin B12 (Cyanocobalamines): Cobalamine has by far the most complicated structure of all the vitamins.
It has a cobalt atom in the centre. It also has – CN groups in its structure.
It is a pink-coloured crystalline, water soluble vitamin.
Question : 6
Potash (Potassium carbonate) is used as a fertilizer. It is also known as
a) pearl ash
b) oil of vitriol
c) azo compound
d) Glauber’s salt
Answer »Answer: (a)
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