JEE Main Chemistry question
Not in JEE Main or NEET syllabus
Given V, V, V. Alkali metals react with water as (M = alkali metal). It is found that Li reacts gently with water, whereas K reacts violently. What is the total score for the correct statement(s) below?
(a) [Score 4] values have nothing to do with the kinetics of the reaction.
(b) [Score 3] The metal having the larger standard oxidation potential will have lesser reactivity.
(c) [Score 2] Potassium has a low melting point and heat of reaction sufficient to melt or even vaporize it, which leads to an exponential increase in its surface area.
(d) [Score 1] The ionization potential of K is smaller than that of Li.
Solution
(a) is correct: is a thermodynamic (equilibrium) property, unrelated to the kinetics (rate) of a reaction — a reaction can be thermodynamically very favourable (very negative , as for both Li and K with water) yet proceed at very different observed rates. (b) is wrong: a metal with a larger
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