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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Here are the solutions to the questions: Question 3: Complete the table below by stating one source and one function of each. | Class of Food | Source | Function | | :------------ | :----------------------------------- | :---------------------------------------- | | Water | Drinking water, fruits, vegetables | Regulates body temperature, transports nutrients | | Protein | Meat, fish, eggs, beans, nuts | Growth and repair of tissues, enzyme production | Question 4: The diagrams below are scientific apparatus. Study them and answer questions. a) Name the apparatus shown in the diagrams above, and state one use of each. i. Apparatus: Thermometer* Use: To measure temperature. ii. Apparatus: Beaker* Use: To hold and mix liquids, or to measure approximate volumes. b) Some common substances were added to three liquids (water, kerosene, alcohol) shown in the table below. Use it to answer question 4. b(i) and b(ii). | Substance | Water | Kerosene | Alcohol | | :-------- | :-------- | :-------- | :-------- | | Salt | soluble | insoluble | insoluble | | Sugar | soluble | insoluble | soluble | | Iodine | insoluble | soluble | soluble | i) Name the substance that can dissolve in both water and alcohol. Based on the table, Sugar is soluble in both water and alcohol. Sugar ii) Which liquid is the best solvent for salt? Based on the table, Salt is soluble in water but insoluble in kerosene and alcohol. Therefore, water is the best solvent for salt among the given options. Water Drop the next question!