Predict the products formed when cyclohexane carbaldehyde reacts with the following reagents:
i. PhMgBr and then `H_(3)O^(+)`
ii. Tollens reagent
iii. Semicarbazine and weak acid
iv. Excess ethanol and acid
v. Zinc amalgam and dilute hydrochloric acid

Explanation

To predict the products formed when cyclohexane carbaldehyde reacts with the given reagents, we will analyze each reaction step by step.

### Given: Cyclohexane Carbaldehyde (C6H11CHO)

### i. Reaction with PhMgBr followed by H3O+
1. **Formation of Grignard Reagent**: PhMgBr is a Grignard reagent. The nucleophilic phenyl ion (Ph-) will attack the electrophilic carbon of the carbonyl group (C=O) in cyclohexane carbaldehyde.

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