VI Chemistry Mock test 1

______ is defined as a basic form of matter that cannot be broken down into simpler substance by chemical reactions.

• Atom

• Element

• Valency

• None of these

The scientist who suggested a method of representing elements using the English letters ( Capitals as well as small) is

• Robert

• Chadwick

• J. J. Berzelius

• None of these

____ represents short form of an element.

• Compound

• Symbol

• Elements

• None of these

______ represents one atom of an element

• Qualitative

• Quantitative

• Aptitude

• None of these

____ is an example of compound

• Air

• Water

• Molecules

• None of these

The smallest particle of an element or compound which is independent existence and can retain all the properties is called a _______

• Atom

• Mixture

• Molecule

• None of these

NaCl in water is an example of ____

• Mixture

• Molecule

• Valency

• None of these

Number of atoms present in one molecule of an element is called _____

• Aoms

• Atomicity

• Aomic structure

• None of these

H2 is an example of

• Atom

• Molecule

• Element

• None of these

Atomicity of ozone is

• 4

• 5

• 3

• 1