Same chapter2 marksDifficulty: Easy
What is valency? State the valency of oxygen, aluminium and the sulphate radical.
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2 marksDifficulty: Easy
Write the symbols of iron, sodium, potassium, silver and lead, and say why they differ from the English names.
Original Khojo Papers practice question — not from a past board paper.
Answer
Fe, Na, K, Ag and Pb. They are taken from the Latin names ferrum, natrium, kalium, argentum and plumbum.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The symbols were fixed before English became the dominant language of science.
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