ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What are the building blocks (monomers) of proteins?

1. AFatty acids
2. BAmino acids
3. CNucleotides
4. DSimple sugars

ข้อใดต่อไปนี้เป็นสารประกอบ

1. Aแก๊สออกซิเจน (O₂)
2. Bเหล็ก (Fe)
3. Cฮีเลียม (He)
4. Dคาร์บอนไดออกไซด์ (CO₂)

น้ำบริสุทธิ์ที่ 25 °C มี pH เท่าใด

1. A1
2. B0
3. C14
4. D7

Why does the vapour pressure of a liquid increase as it is heated?

1. AThe liquid's volume decreases and squeezes out vapour
2. BMore molecules have enough energy to escape into the gas phase
3. CThe attractions between the molecules become stronger
4. DThe molecules become heavier and press harder on the surface

Why do group 1 metals such as sodium react so easily?

1. ATheir nuclei contain no neutrons
2. BThey have a full outer shell of electrons
3. CThey easily gain one extra electron
4. DThey have one outer electron that is easily lost

A red blood cell is placed in a concentrated (hypertonic) salt solution. What happens?

1. AWater leaves the cell, which shrinks
2. BThe cell stays the same size and shape
3. CSalt leaves the cell, which swells
4. DWater enters the cell, which swells and may burst

A patient's temperature is 104 °F. What is it in degrees Celsius?

1. A43 °C
2. B72 °C
3. C58 °C
4. D40 °C

An isotope has a half-life of 8 days. How long does it take for 100 g to decay to 12.5 g?

1. A16 days
2. B24 days
3. C64 days
4. D32 days