Question # 1

Which of the following is used to cheek heart beat and blood pressure.

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Thermometer

Galvanometer

Stethoscope

Ammeter

The Earth completes one revolutin around the Sun in days.

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28

29

365

370

During combustion, a substance reacts with

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Hydrogen

Water

Oxygen

Carbon di oxide

Chemical reaction of oxygen with other substances is called.

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Oxidation

Reduction

Rusting

None of these

The particles of an element having different mass numbers.

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Proton

Neutrons

Isotopes

Atoms

Original colur or Nichrome wire is.

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Silver grey

Red hot

White hot

None of these

A pigment in the skin that protcts harmful effects of sunlight.

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Haemoglobin

Melanin

Lysozyme

Lymphocyte

Rusting of iron takes place in the presence of.

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Moisture

O2

Both moisture and O2

Dry air

Chemical bond in O2 is.

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Ionic

Covalent

Metallic

None of these

Oxygen is a

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Monoalent element

Divalent element

Trivalent element

Tertravalent element

What is the season on 22 June in the southern hemisphere.

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Spring

Autumn

Sumer

Winter

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