States of Matter

The basic building blocks for all matter in the universe

• volume

• atoms

• molecules

• matter

Salt is made up of two types of atoms, they are......

• sodium and hydrogen

• hydrogen and oxygen

• potassium and nitrogen

• sodium and chlorine

0 degree Celcius: Freezing point of water:: ______: Boiling point of water

• 100 degree celcius

• 110 degree Celcius

• 120 degree Celcius

• 98 degree Celcius

Which of the following substance is able to sublime?

• Carbon dioxide

• Salt

• Water

• Air

Answer explanation

Carbon dioxide can easily sublime from its gaseous state to its solid state called dry ice.

Baking of cake is an example of?

• Chemical change

• Reversible change

• Irreversible change

• Both (a) and (c)

Answer explanation

Baking of cake is an example of both chemical as well as irreversible change.

Which process is taking place in the picture?

• Melting

• Precipitation

• Vapourisation

• Condensation

Which of the following has a definite volume but no definite shape?

• 
• 
• 
• All of these

Digestion of food is an example of

• Solubility

• Physical change

• No change

• Chemical change

A chemical change takes place when one form of matter changes to ______.

• An atom

• Another kind of matter

• Property

• None of these

Which of the following is an example of condensation?

• Formation of ice from water

• Conversion of water vapour from ice

• Conversion of water from water vapour

• Conversion of water vapour from water