When a solid directly turns into gaseous state, it is called:

___________ is known as blue Vitriol.

Melting of ice is an example of:

Dissolving salt in water is a/an:

When nitrogen reacts with hydrogen under high temperature and pressure ammonia, which is also a gas is formed. This is an example of:

Properties such as shape,size,colour and state of a substance are called its ________ properties.

Chemical changes are 

Photosynthesis is a _________ change.

Burning of Magnesium ribbon is a ________ change.

The process of depositing a layer of zinc on iron is called