Same chapter3 marksDifficulty: Medium
State three uses of hydrogen.
Study of the First Element: Hydrogen
3 marksDifficulty: Medium
What is the activity series, and how does it decide whether a metal will displace hydrogen from a dilute acid?
Original Khojo Papers practice question — not from a past board paper.
Answer
The activity series arranges metals in order of their tendency to lose electrons and form ions. A metal above hydrogen in the series will displace hydrogen from a dilute acid, and one below it will not.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Zinc, iron and magnesium displace hydrogen; copper, silver and gold do not.
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