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Class 9 Physics — Online Test

Chapter 9: Transfer of Heat

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📋 Instructions: Select one answer for each question, then click Submit Test at the bottom to see your score and correct answers.

Q1 Which surface is the best absorber of heat radiation?

White and shiny Black and dull White and dull Silver and shiny

Q2 Which surface is the best reflector of heat radiation?

Black and dull White and shiny Black and shiny Red and dull

Q3 A thermos flask reduces heat transfer by:

Conduction only Convection only Radiation only All three methods

Q4 Land breeze blows from:

Sea to land during day Land to sea during night Sea to land during night Land to sea during day

Q5 Sea breeze blows from:

Sea to land during day Land to sea during night Sea to land during night Land to sea during day

Q6 Greenhouse effect is caused by trapping of:

UV rays Infrared radiation X-rays Visible light

Q7 Good conductors of heat are generally:

Non-metals Gases Metals Liquids

Q8 Which is the poorest conductor of heat?

Copper Iron Water Air

Q9 During evaporation, temperature of liquid:

Increases Decreases Remains same First increases then decreases

Q10 Global warming is mainly caused by increase in:

Oxygen Nitrogen Carbon dioxide Hydrogen

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