Which Reaction Is a Good Small-Scale Laboratory Method for the Preparation

question 49

Multiple Choice

Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

• A) CH₄(g) + H₂O(g) → CO(g) + 3H₂(g)
• B) 3FeCl₂(s) + 4H₂O(g) → Fe₃O₄(s) + 6HCl(g) + H₂(g)
• C) NaH(s) + H₂O(l) → NaOH(aq) + H₂(g)
• D) CO(g) + H₂O(g) → CO₂(g) + H₂(g)
• E) None of these methods is useful.

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Definitions:

Fixed Manufacturing Overhead

Indirect manufacturing costs that remain relatively constant regardless of the level of production, such as rent, salaries, and insurance.

Contribution Margin

The amount remaining from sales revenue after variable expenses are deducted, indicating how much contributes to covering fixed costs and generating profit.

Net Operating Income

The income generated from normal business operations after subtracting operating expenses from gross profit.

Fixed Expenses

Costs that do not fluctuate with changes in production level or sales volume, ensuring stability in budget planning.