Q5 of 56 Page 84

Write true or false for the following statements:

The elements having one valency are called monovalent.

True

The elements having one valency are called monovalent. The given statement is correct.


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3

Write true or false for the following statements:

Iron shows valency of Fe2+ and Fe3+.

 4

Write true or false for the following statements:

The formulae of cupric oxide and cuprous oxide are CuO and Cu2O respectively.

 6

Write true or false for the following statements:

A group of atoms carrying a charge are called bivalent ions.

 7

Write true or false for the following statements:

Atomicity of phosphorus is 5 and that of sulphur is 6.