Language of Chemistry - Class 8

A dish is given to you, which contains a blackish-yellow powder. When you move a magnet over it, black particles fly upwards and get stuck to the magnet. All left in the dish is a yellow powder, which you discover to be sulphur.

Was your original powder an element, compound, or mixture?

The symbol of tungsten is ?

• Tu

• T

• W

• Ts

What does an upward arrow (⬆) indicate in a chemical reaction ?

• Formation of a precipitate

• Evolution of a gas

• Change of state

• Catalyst

In an exothermic reaction.....?

• Energy is released

• Change of energy doesn't occur

• Energy is evolved

• None of these

A ________ is an insoluble solid substance formed when two solutions are mixed.

What is formula of Ammonia ?

• NH₃

• NH₄

• CH₄

• Am

________ was the first to suggest that Latin names of elements be used as their symbols.

• John Dalton

• Berzillius

• Aristotle

• Antoine Lavoisier

If an element has two different valencies, the suffix ____ is used for the higher valency.

• ous

• ic

• ide

• ite

The first element in the Periodic table is _________.

The Latin name of Tin is ______.

• Stannum

• Stibium

• Tungsten