Question

Which of the following is an anion with Valency two?
(A)Sulphate
(B) Carbonate
(C) hydride
(D)Phosphate.

Answer 1

The answer is sulphate

Answer 2

Given:

4 anionic radicals have been provided.

To find:

Which among them have a valency 2 ?

Calculation:

• Please try to remember the valencies of as many radicals as possible as a piece of information.

1. $(SO_{4})^{2-}$ Sulphate : 2

2. $(CO_{3})^{2-}$ Carbonate : 2

3. Hydride $H^{-}$ : 1

4. Phosphate $(PO_{4})^{3-}$ : 3

In this question, sulphate and carbonate have valency 2.

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Some of the other radicles you need to remember:

• Sulphite : 2
• Hydroxide : 1
• Oxide : 2
• Sulphide : 2
• Halides : 1
• Permanganate : 1
• Bisulphite : 1
• Phosphide : 3
• Nitride : 3
• Nitrate : 1
• Chlorate : 1

$\star$ Hope It Helps.