set 1 MCQ Questions & Answers Detailed Explanation

MOST IMPORTANT general science mcq - 2 EXERCISES

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The following question based on some important man made materials topic of general science mcq

Questions : Which of the statements about glass are correct?
  1. Glass is a super-cooled liquid having infinite viscosity.
  2. Violet coloured glass is obtained by adding MnO2 .
  3. Glass is a man-made silicate.
  4. Glass is a crystalline substance.
Select the correct answer using the codes given below.

(a) 1, 2 and 3

(b) 2, 3 and 4

(c) 1, 2 and 4

(d) 1 and 3

The correct answers to the above question in:

Answer: (d)

Glass is an amorphous substance.

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Question : 1

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: (a)

Question : 2

Which one of the following contains cobalt ?

a) Vitamin A

b) Vitamin B12

c) Riboflavin

d) Vitamin B6

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 : 3

Which one of the following is a vitamin?

a) Oxalic acid

b) Ascorbic acid

c) Benzoic acid

d) Formic acid

Answer: (b)

Vitamin C is chemically ascorbic acid.

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