This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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11. Step 1: Examine the table to find the time taken for the reaction to be completed at each pH value. Step 2: Identify the pH at which the time taken is the shortest, as this indicates the optimum pH for the enzyme's activity. At pH 1, time = 95 s At pH 3, time = 64 s At pH 5, time = 42 s At pH 7, time = 35 s At pH 9, time = 66 s At pH 11, time = 88 s Step 3: The shortest time is 35 seconds, which occurs at pH 7. C 12. Step 1: Recall the basic chemical composition of carbohydrates. Step 2: Carbohydrates are organic compounds primarily composed of carbon, hydrogen, and oxygen atoms, typically in a ratio of C_x(H_2O)_y. A 13. Step 1: Understand the function of protease enzymes. Protease enzymes break down proteins. Step 2: Identify the products of protein digestion. Proteins are polymers made of amino acids, so their breakdown yields amino acids. Step 3: Interpret the observation. The change from a cloudy suspension to a clear solution indicates that the large protein molecules (which cause cloudiness) have been broken down into smaller, soluble molecules. A 14. Step 1: Write down the word equation for photosynthesis. Carbon dioxide + Water light and chlorophyll Glucose + Oxygen Step 2: Match the given phrases to the components of the equation: 1. carbon dioxide and water (reactants) 2. light and chlorophyll (conditions) 3. glucose and oxygen (products) Step 3: Arrange these phrases into the correct sequence for the word equation. 1 in the presence of 2 3 B 15. Step 1: Recall the symptoms associated with scurvy. Step 2: Scurvy is caused by a deficiency of vitamin C, and common symptoms include general weakness, anemia, and gum disease, which manifests as bleeding gums. A Drop the next question.