Question # 1

Which of the following has stble elecronic configuration.

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H

He

C

Li

The first cell formed due to the fusion of reproductive cells in plants in called.

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Embryo

Zygote

Root

Stem

The lowest pointof a wave is................

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Crest

Amplitude

Peak

Trough

Which of the following animals can respond to lowest frequency.

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Cat

Cow

Dog

Dolphin

Which of the following animals can respond to highest frquency.

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Bat

Cat

Frog

Dolphin

A molecule consists of two or more

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Compounds

Atoms

Formulae

Element

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

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Covalent

Ionic

Metalic

None of these

When a 10 cm iron rod is heated to hgh tempeature.

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Its volume decreases

Its volume increases

Its density deceases

Its density increses

Freezing of a liquid is a

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Chemical change

Chemicla property

Physical change

None of these

Growth of microorganisms canbe controlled by

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Dehydration

Drying

Adding preservative

a,b,c all

Is the application of scientific knowledge in daily life.

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Irrigation

Salt formation

Brine

Technology

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

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15 km

20 km

25 km

30 km

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

The weight of an object in Earth's gravitaional field depends on.

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Mass of the object

Acceleration due to gravity

Both a and b

None of these

Element present in grops have same number of ....... in their outermost shell.

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Electron

Proton

Atoms

Neutron

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