Among the following the one that gives positives iodoform test upon reaction with $${I_2}$$ and $$NaOH$$ is

Acid catalyzed hydration of alkenes except ethene leads to the formation of

The best reagent to convert pent -3- en-2-ol into pent -3-en-2-one is

Acetyl bromide reacts with excess of CH₃MgI followed by treatment with a saturated solution of NH₄Cl given