NATURE OF MATTER

The smallest unit of an element which always takes part in a chemical reaction is

• Mixture

• Atom

• Molecule

• Compound

A state of matter that has a definite volume but has no definite shape is a

• Solid

• Liquid

• Gas

• All the above

Which one of the following is a liquid metal?

• Mercury

• Argon

• Iron

• Bromine

Which one of the following has a fixed shape and definite volume?

• Solids

• Liquids

• Gases

• All the above

Which of the following is a pure substance ?

• Mixtures only

• Elements only

• Compounds only

• Elements and Compounds

An element

• is made up of 2 or more different atoms

• is made up of only one type of atoms

• cannot be chemically combined with other elements

• cannot be physically combined with other elements

Matter occupies

• space

• has mass

• space and has mass

An example of Noble gas is

• Carbon- dioxide

• Nitrogen

• Argon

• Oxygen

Metals are

• Ductile

• Malleable

• Sonorous

• All the above

Which one of the following is not a Non -Metal

• Nitrogen

• Zinc

• Sulphur

• Hydrogen