States of matter class 5

Burning of wood is a ______ change

• Reversible

• Irreversible

Melting of wax

• Chemical change

• Physical changes

• Reversible

• Irreversible

Rubber is a good conductor of electricity

• True

• False

Corrosion is________

• Useful

• Harmful

• Good

• Very good

Burning anything means

• Corrosion

• Combustion

• Both of these

• None of these

What is thermal conductivity?

• Electricity pass through

• Heat pass through

• Heat can not pass through

• All of these

Name the substance good conductor of electricity

• Rubber

• Glass

• Copper

• Gold

Example of two miscible liquid

• Oil

• Milk

• Water

• Kerosene

_________ attracts the iron objects

• Wood

• Magnet

• Glass

• None of these

Name the substance soluble in water

• Sand

• Salt

• Soil

• Sugar