Metals which liberate hydrogen on treatment with acids must be:
A
more electronegative than hydrogen
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
less electropositive than hydrogen
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
higher compound
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
more electropositive than hydrogen
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution
The correct option is C more electropositive than hydrogen Let us consider a general reaction of a metal with an acid.
2M+2HA⟶2MA+H2↑
To displace A− ion from HA, the metal M should be more electropositive than H+ so that it can form more stable oxide. If the metal is less electropositive, it would not be able to displace A− ion from HA because the H−A bond will be strong due to more difference between the electronegativity of H and A.
Thus the answer is option (D) more electropositive than hydrogen.