15
Question
What are the valencies of cuprous and cupric ions?
What are the valencies of cuprous and cupric ions?
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Solution
The correct option is A +1 and +2
The explanation for the correct option:
The valencies of cuprous and cupric ions are +1 and +2. Some elements like copper and iron exhibit more than one valency. That is they have variable valencies.
Generally the name of the element end in 'ous' for lower valency and ends in 'ic' for higher valency.
The valency of cuprous is 1 and the valency of cupric is 2.
The explanation for incorrect options:
Other valencies are not the answer as these valencies are not possible for copper compounds.
Hence, option (A) is the correct answer.
+1 and +2
The explanation for the correct option:
The valencies of cuprous and cupric ions are +1 and +2. Some elements like copper and iron exhibit more than one valency. That is they have variable valencies.
Generally the name of the element end in 'ous' for lower valency and ends in 'ic' for higher valency.
The valency of cuprous is 1 and the valency of cupric is 2.
The explanation for incorrect options:
Other valencies are not the answer as these valencies are not possible for copper compounds.
Hence, option (A) is the correct answer.
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