Chemistry
'M' is an element above lead in the activity series of metals. Select the correct answer in each case from (i) to (iii).
(a) M - 3e- ⟶ M3+: The process takes place by oxidation/reduction.
(b) M3+ ⟶ M: The cation gets reduced/oxidised to neutral atom.
(c) M reacts with dil. H2SO4 - to liberate hydrogen/sulphur dioxide gas.
Sulphuric Acid
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Answer
(a) oxidation
(b) reduced
(c) hydrogen
Reason — Since M is above lead in the reactivity series, it is reactive enough to displace hydrogen from dilute acids. Therefore, it will liberate hydrogen gas (H2) when reacting with dilute sulphuric acid.
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