Question

1. which of the following is a carbohydrate? a. nh₃ b. co₂ c. c₂h₄o d. c₅h₁₀o₅

Explanation:

Step1: Recall carbohydrate formula

Carbohydrates have the general formula $C_x(H_2O)_y$.

Step2: Analyze each option

• Option a: $NH_3$ is ammonia, no carbon - hydrogen - oxygen ratio as in carbohydrates.
• Option b: $CO_2$ is carbon - dioxide, has no hydrogen in the right ratio.
• Option c: $C_2H_4O$ does not follow the $(CH_2O)$ ratio strictly.
• Option d: $C_5H_{10}O_5$ can be written as $C_5(H_2O)_5$, follows the carbohydrate formula.
• Option e: (Not shown completely in the question, but from the above analysis, $C_5H_{10}O_5$ is a carbohydrate).

Answer:

d. $C_5H_{10}O_5$