(3) The flagpole hydrogens are present on the C-1 and C-4 carbon atoms. (4) When

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(3)

The flagpole hydrogens are present on the C-1 and C-4 carbon atoms.

(4)

When the temperature is increased, the collision frequency is increased, so the collisions with sufficient energy and with proper orientations are also increased.

Thus, the correct answer is (II), (III) and (IV).

(7)

The correct order is:

E > D > B > A > C

This is because as the 's' character in the hybrid orbitals increases, the electronegativity increases and thus the acidity also increases.

Thus ethyne is more acidic than ethene, which is more acidic than ethane.

Hope this helps !

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