VI JEE Mock 2 27/11

The symbolic representation of actual number of atoms in molecule is called

• Valency

• Formula

• Both 1&2

• Ion

A formula has

• Qualitative significance

• Quantitative significance

• Both qualitative and quantitative

• None

The chemical formula for water is

• H2O2

• H2O

• O2

• H2

What is the formula of hydrochloric acid?

• HCl

• H2

• Cl2

• H2SO4

Chemical formula for calcium sulphate is CaSO4. The formula for Ferric sulphate will be____

• Fe2(P2O7) 3

• Fe4P3O14

• Fe2(SO4) 3

• Fe3(PO4)

Identify correct statement

• The representation of molecule of substance in terms of symbols and subscript numbers is known as formula

• Atoms of different elements combine in certain fixed ratio to form a compound

• All chemical compounds are represented by their respective formula

• All the above

Chemical formula of aluminum sulphide is

• Al2S3

• Al2(SO4) 3

• Al3S2

• Al Cl3

Chemical formula for ammonium nitrite is

• NH4( NO) 2

• (NH4) 2NO

• NH4NO3

• NH4NO2

Chemical formula of sodium acetate is

• NaHCO

• NaHCO3

• CH3COONa

• Chocolate Ne

The symbol of dichromate ion is

• Cr2O4-

• Cr2O7 -2

• Cr2O4 +2

• Cr2O4 +3