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Chemistry

Page 16

Which of the following is used as an anti-knock in automobile engines?

a.

Tetramethylsilane

b.

Leadtetraethyl

c.

Glycerol

d.

N-heptane

The use of diamond in abrasives is due to its

a.

high melting point

b.

hardness

c.

octahedral shape

d.

durability

Which of the following terms indicates the number of bonds that can be formed by an atom?

a.

Oxidation number

b.

Valence

c.

Atomic number

d.

Electronegativity

The refreshing characteristic taste of fizzy drinks is due to the presence of:

a.

carbon(IV) oxide

b.

glucose

c.

hydrogen

d.

sodium citrate

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