A teacher gives three examples: air, salt water, and brass. What are the states of the solvents respectively?
Answer and explanation
Correct answer: Gas, liquid, solid
The concept is that the solvent is usually the component present in the larger amount and its physical state determines the solution’s state. In air, the major component is gaseous, so the solvent is a gas. In salt water, water is the liquid solvent. In brass, copper is commonly the major metal and acts as the solid solvent. Thus the sequence is gas, liquid, solid, making A correct; the other sequences misassign at least one solvent state.
Frequently asked questions
What is the correct answer to this question?
Gas, liquid, solid
Why is this the correct answer?
The concept is that the solvent is usually the component present in the larger amount and its physical state determines the solution’s state. In air, the major component is gaseous, so the solvent is a gas. In salt water, water is the liquid solvent. In brass, copper is commonly the major metal and acts as the solid solvent. Thus the sequence is gas, liquid, solid, making A correct; the other sequences misassign at least one solvent state.
Which subject and chapter does this question cover?
This is a Class 9 Science question. Chapter: Exploring Mixtures and Their Separation. Topic: Solute and solvent.
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