Variable Valency
Variable Valency
Variable Valency : Some element show more than one type of valency these types of valency are called variable valency. These types of compounds show a valency in one compound and another valency in other compounds. Variable valency is shown by elements like iron, mercury, and copper. Transition elements show variable valency.
Certain elements combine with other atoms, donating, accepting or sharing electrons in different proportions depending on the nature of the reaction.
For example : Iron combines with oxygen to form ferrous oxide as well as ferric oxide. This is termed variable valency. Transition metals nickel, copper, tin and iron exhibit variable valency.
Elements with variable valency :
Copper(Cu) = Cuprous (Cu+2) and Cupric (Cu+3)
Iron (Fe) = Ferrous (Fe+2) and Ferric (Fe+3)
Mercury (Hg) = Mercurous (Hg+1) and Mercuric (Hg+2)
Silver (Ag) = Argentous (Ag+1) and Argentic (Ag+2)
Which of the following element shows variable valency? | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following statement / statements are correct : (a) Iron reacts with oxygen to form ferrous oxide. (b) Iron reacts with oxygen to form ferric oxide. (c) Iron have variable valency i.e. 1 and 2. (d) Iron have variable valency i.e. 2 and 3. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following statement / statements are correct : (a) Copper have variable valency. (b) Oxygen do not have variable valency. (c) Neon have variable valency. (d) Iron have variable valency. | |||
| Right Option : D | |||
| View Explanation | |||
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