Question

1. which of the following substances would be classified as an acid?

a. $\ce{h_{2}c_{4}h_{4}o_{6}}$ b. $\ce{he}$ c. $\ce{al(oh)_{3}}$ d. $\ce{c_{6}h_{12}}$

1. which of the following is a binary acid?

Explanation:

Step1: Define acid classification rules

Acids typically release H⁺ in solution; binary acids have H + 1 non-metal.

Step2: Analyze Question 7 options

• a. $\text{H}_2\text{C}_4\text{H}_4\text{O}_6$ (tartaric acid): Releases H⁺, is an acid.
• b. $\text{He}$: Noble gas, not an acid.
• c. $\text{Al(OH)}_3$: Hydroxide, is a base.
• d. $\text{C}_6\text{H}_{12}$: Hydrocarbon, not an acid.

Step3: Analyze Question 8 options

• a. Hydrophosphoric acid: Formula $\text{H}_3\text{P}$, binary (H + P, non-metal).
• b. (No option text, incomplete)
• c. Hydrosulfuric acid: Formula $\text{H}_2\text{S}$, binary (H + S, non-metal).

Answer:

1. a. $\text{H}_2\text{C}_4\text{H}_4\text{O}_6$
2. c. hydrosulfuric acid, a. hydrophosphoric acid (note: option b is incomplete, but the valid binary acids from given options are these two)