Same chapter2 marksDifficulty: Easy
Write the symbols of iron, sodium, potassium, silver and lead, and say why they differ from the English names.
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2 marksDifficulty: Easy
What is valency? State the valency of oxygen, aluminium and the sulphate radical.
Original Khojo Papers practice question — not from a past board paper.
Answer
Valency is the combining capacity of an element or radical, that is the number of hydrogen atoms it can combine with or displace. Oxygen has a valency of 2, aluminium of 3 and the sulphate radical of 2.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The valency of an element is decided by the number of electrons it gains, loses or shares.
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