Question # 1

What is transferred by teh movement of waves.

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matter

energy

both a and b

None of these

Which of the following features of a wave is the number of waves that pass by each second.

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Loudness

Amplitude

Frequency

Wave speed

An element with fifteen protons in its atomic nucleus has atomic numebr.

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5

10

15

20

Which of the following is insoluble in water.

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Sodium chloride

Oil

Table salt

Baking Powder

Formula showing maximum number of electrons in a shell.

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n2

2n2

3n2

4n2

Which of teh following is cation.

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H2

H2O

CO2

NH+4

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

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2

8

18

32

Which of the following is the major cause of tides.

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Heating oceans by the Sun

Changein the wind direction

Gravitaational pull of the Moon

Earthquakes on the surface of the ocean floor.

Dolphins can hear sound underwater from up to ............ away

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15 km

20 km

25 km

30 km

On heating sugar changes into

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Carbon

Water

Both carbon and water

Heat

Chemical reaction of oxygen with other substances is called.

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Oxidation

Reduction

Rusting

None of these

Oxygen and .... are the products of photosynthesis.

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Water

Carbon di oxide

Glucose

Chlorophyll

Conservation of water means.

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A using water

Save water

Avoiding water

Wasting water

Nuclear membrane is not found in.

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Plant cell

Animal cell

Bacterial cell

Fungal cell

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

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