Question # 1

In .... elements are arranged in order of increasing atomic numbers.

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Group

Period

Orbit

Shell

A piece of iron is kept in open air for 5 days. A film of corrosion formed over it is.

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Iron oxide

Iron sulphide

Iron Chloride

Iron Hydride

There are ............ groups in periodic table.

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2

8

18

32

An object produce a sound with a frequency of 50 Hz. Find its tiem period.

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0.01 sec

0.03 sec

0.02 sec

0.04 sec

The contraction of the objects on cooling is due to.

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Reduction in size of the particles

Increase in size of the particles

Increase in inter particles distances

Decrease in inter particle distances

The Earth completes one revolutin around the Sun in days.

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28

29

365

370

Which is not used in the preparation of orange juice.

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Garlic

Orange

Sugar

Water

Which blood vessesl have valves in it.

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Capillaries

Artery

Vein

Arteriole

The maximum numebr of electrons that N-Shell accomodate are.

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2

8

18

32

The particle of an atom having negative charge on it.

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Electron

Proton

Neutron

Nucleus

Chemical bond teh forms between metallic and non-metallic atoms.

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Covalent

Ionic

Metalic

None of these

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