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Which of the following statements is correct?

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Tautomers differ in the arrangement of atoms and are also in rapid equilibrium with each other

Keto-enol tautomerism is an equilibrium between two acids favouring the formation of the stronger acid.

A pair of electron in an $sp$ hybrid orbital of carbon is less near to the nucleus as compared to that in an $s p^{3}$ hybrid orbital.

2-Butyne reacts with ammoniacal silver nitrate solution.

answer is A.

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Detailed Solution

(b) Equilibrium reaction always favours the formation of weaker substances. In keto-enol tautomerism, we have

( c) An $sp$ hybrid orbital has more s-character as compared to an ${sp}^{3}$ hybrid orbital.

(d) 2-butyne does not contain acetylinic hydrogen atom.

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