정답이 있는 간호학 입학 시험 대비 화학 학습지

In a solution, what is the solvent?

1. AAny solid that will not dissolve, however long it is stirred
2. BThe gas given off when a solid dissolves
3. CThe substance that is dissolved, usually present in the smaller amount
4. DThe substance that does the dissolving, usually present in the larger amount

A blown-up balloon is put in a freezer. What happens to its volume?

1. AIt stays exactly the same
2. BThe balloon bursts
3. CIt increases
4. DIt decreases

What is activation energy?

1. AThe energy stored in the products
2. BThe minimum energy reacting particles need for a reaction to happen
3. CThe total energy released once the reaction has finished
4. DThe energy needed to melt a solid

Why does water boil at a lower temperature at the top of a high mountain?

1. AThe air is colder, so the water loses heat and boils sooner
2. BThe air pressure is lower, so less vapour pressure is needed to boil
3. CGravity is weaker, so the molecules escape more easily
4. DThere is less oxygen dissolved in the water up there

온도가 일정할 때 기체의 부피를 절반으로 줄였습니다. 압력은 어떻게 되나요?

1. A4분의 1이 된다
2. B절반이 된다
3. C그대로이다
4. D두 배가 된다

What is carbon-14 dating used for?

1. AFinding the exact age of rocks that are billions of years old
2. BMeasuring body temperature
3. CEstimating the age of material that was once alive
4. DDetecting carbon monoxide in a room

Glucose (C₆H₁₂O₆) and fructose (C₆H₁₂O₆) join by a condensation reaction to form sucrose. What is the formula of sucrose?

1. AC₆H₁₂O₆
2. BC₁₂H₂₄O₁₂
3. CC₁₂H₂₂O₁₁
4. DC₁₂H₂₀O₁₀

Why does food cook faster in a pressure cooker?

1. AThe higher pressure raises the boiling point, so the water is hotter
2. BSteam is trapped, so the water boils at a lower temperature
3. CPressure itself breaks down the food, regardless of temperature
4. DThe higher pressure lowers the boiling point