Question

1. choose the best answer.

when a(n) ______ agent reduces, it causes oxidation in another substance.
○ reducing
○ oxidizing
○ conserving
○ equating

1. choose the best answer.

what is likely a reactant in a combustion reaction?
○ ca⁺
○ c₂h₁₀
○ light
○ heat

Explanation:

Question 5

In redox reactions, a reducing agent donates electrons (is oxidized) and causes another substance to be reduced. However, the question states that when the agent reduces (gains electrons, is reduced), it causes oxidation in another substance. An oxidizing agent is reduced (gains electrons) and causes the oxidation of another substance. "Conserving" and "equating" are not relevant terms for redox agents. So the correct term is "oxidizing".

Combustion reactions typically involve a hydrocarbon (compound with carbon and hydrogen) reacting with oxygen to produce carbon dioxide and water. \( \text{Ca}^+ \) is an ion, light and heat are energy forms (products or conditions, not reactants of combustion). \( \text{C}_2\text{H}_{10} \) (though the correct formula for a hydrocarbon with 2 carbons is \( \text{C}_2\text{H}_6 \), likely a typo) is a hydrocarbon, so it's a likely reactant in combustion.

Answer:

B. oxidizing (assuming the options are labeled as A. reducing, B. oxidizing, C. conserving, D. equating)

Question 6