Question # 1

Negatively charged atom or grop of atoms is called.

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Proton

Electron

Anion

Cation

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

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

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Thermometer

Galvanometer

Stethoscope

Ammeter

Valency of nitrogen is

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1

2

3

4

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

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.

Which gas reacts with food to convert it into carbon dioxide and water.

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Oxygen

Nitrogen

Phosphorus

Argon

The Earth's pull on the objects is called.

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Gravity

Frictional force

Electrostatic force

Magnetic force

The ... prevents food from entering the trachea.

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Glottis

Epiglottis

Bronchi

Alveoli

A gas produced on heating solid potassium chlorate is.

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Hydrogen

Carbon dioxide

Oxygen

Methane

Value of "g" is taken on Earth is.

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1.6 N/kg

9 N/kg

10 N /kg

100 N /kg

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