Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.

Zinc amalgam and dilute hydrochloric acid

Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.

Semicarbazide and weak acid

Predict the products formed when cyclohexanecarbaldehyde reacts with following reagents.

Excess ethanol and acid

Which of the following compounds would undergo aldol condensation, which the Cannizzaro reaction and which neither? Write the structures of the expected products of aldol condensation and Cannizzaro reaction.

(i) Methanal

(ii) 2-Methylpentanal

(iii) Benzaldehyde

(iv) Benzophenone

(v) Cyclohexanone

(vi) 1-Phenylpropanone

(vii) Phenylacetaldehyde

(viii) Butan-1-ol

(ix) 2,2-Dimethylbutanal

How will you convert ethanal into the following compounds?

Butane-1,3-diol