Question # 1

Formation of water form hydrogen and oxygen is:

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Redox reaction

Acid-base reaction

Neutralization

Decomposition

Metals are covered by using.

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Baeyer's test

Bohr's

Electrolysis

None

____________ of copper is done by electrolysis.

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Production

Refining

Both

Nil

Which of the following is less malleable?

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Sodium

Iron

Gold

Sliver

The quantity of a matter in a body is called ____________

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Mass

Weight

Atom

Molecule

A heterogeneous mixture of different substance are called:

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Solution

Suspension

Colloids

Nil

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

How many number of electrons take part in triple covalent bond?

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2

4

6

8

In a discharge tube, the pressure of a gas is kept at

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10-2 atm

10-4 atm

10-6 atm

10-8 atm

H° + H° are ________________ in energy.

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Lower

Higher

Medium

Nil

For diagnosis of goiter in thyroid gland we use

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Co-60

C-14

I-131

Sr-90

H° - H° has ________________ energy.

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Lower

Higher

Medium

Nil

An ________________ scientist arranged the elements in order in periodic table.

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English

Italian

African

Indian

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