Question # 1

Area around nucleus where electrons are found are called.

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Orbit

Shell

Both a and b

None of these

Value of g on moon is

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1.6 N/kg

16 N /kg

10 N/g

1 N/kg

Outermost shell of chlorine stom has................. electrons.

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1

2

6

7

The thin transparent membrane around heart is called.

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Pericardium

Atria

Veins

Ventricle

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 total numebr of electrons which M shell can accommodate

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2

8

18

32

------------- in mouth has antiseptic property and kills microogansms in food.

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Tongue

Teeth

Saliva

Trachea

The average energy due to movement of molecules in a substances is called.

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Potenital energy

Electric energy

Kinetic energy

Chemical energy

What are teh products when electric current is passed through water.

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Only steam

Hydrogen and steam

Hydrogen and oxygen

Oxygen and steam

Freezing of a liquid is a

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Chemical change

Chemicla property

Physical change

None of these

------------ waves are produced in stretched string.

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Longitudinal wave

Elecromagnetic wave

Transverse wave

None of these

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