Chemical Composition of Air-Classification of Elements (CBSE-NET (UGC) Environmental Science (Paper-II & Paper-III)): Questions 1 - 2 of 2

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Question number: 1

» Chemical Composition of Air » Classification of Elements

Appeared in Year: 2009

MCQ▾

Question

The mass of 1 mole of electron is equal to (December)

Choices

Choice (4) Response
a.

9.1094×6.16×1028g

b.

9.1094×1031×6.023×1023kg

c.

(9.1094×1031)/6.023×1023kg

d.

(6.023×1023)/6.1094×1028gm

Question number: 2

» Chemical Composition of Air » Classification of Elements

Appeared in Year: 2009

MCQ▾

Question

Which one of the following is not a permitting cryoprotectant? – (December)

Choices

Choice (4) Response
a.

Glycerol

b.

Sucrose

c.

DMSO

d.

1, 2 – propanediol

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