ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What is gamma radiation?

1. AHigh-energy electromagnetic radiation with no mass or charge
2. BA fast stream of protons from the nucleus
3. CA slow-moving electron
4. DA stream of helium nuclei with a positive charge

Which group contains the alkaline earth metals, such as magnesium and calcium?

1. AGroup 17
2. BGroup 18
3. CGroup 2
4. DGroup 1

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

1. AIt increases
2. BIt stays exactly the same
3. CIt decreases
4. DThe balloon bursts

Which element has chemical properties most similar to calcium?

1. AMagnesium
2. BScandium
3. CPotassium
4. DCarbon

For the gas reaction N₂ + 3H₂ ⇌ 2NH₃, what is the effect of increasing the pressure?

1. AThe equilibrium shifts to the right, toward NH₃
2. BThe NH₃ breaks down completely
3. CThere is no effect on the equilibrium
4. DThe equilibrium shifts to the left, toward N₂ and H₂

Which nuclear process powers the Sun?

1. AAlpha decay of helium
2. BCombustion of hydrogen gas with oxygen in its core
3. CFusion of hydrogen nuclei to form helium
4. DFission of uranium into smaller nuclei

โมเลกุลกลูโคส C₆H₁₂O₆ หนึ่งโมเลกุลมีกี่อะตอม

1. A72
2. B3
3. C18
4. D24

Which statement correctly distinguishes a scientific law from a scientific theory?

1. ALaws apply only to chemistry, theories only to biology
2. BA law is only a guess, while a theory is a proven fact
3. CA law describes what happens; a theory explains why it happens
4. DA theory becomes a law once it is proved