Which of the following on reaction with dil. H₂SO₄ releases hydrogen gas:
Correct answer: D. Both b and c
- A. Copper
- B. Zinc
- C. Iron
- D. Both b and c
Explanation
A metal will displace hydrogen from a dilute acid if it is more reactive than hydrogen (i.e., higher in the electrochemical series). Both Zinc (Zn) and Iron (Fe) are more reactive than hydrogen and will produce H₂ gas. Copper is less reactive and will not react.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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