ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

How many electrons are shared in a double covalent bond?

1. A4
2. B6
3. C2
4. D8

Carbon has an atomic mass of 12. What is the mass of 1 mole of carbon atoms?

1. A1 g
2. B6 g
3. C12 g
4. D24 g

Which mixture is a suspension?

1. ASand stirred into water
2. BOxygen dissolved in water
3. CSalt dissolved in water
4. DSugar dissolved in water

Drops of water form on the outside of a glass of ice water. Where does this water come from?

1. AWater leaks through tiny holes in the glass
2. BThe glass releases water when it gets cold
3. CWater vapour in the air condenses on the cold glass
4. DThe ice evaporates through the glass

What is nuclear fission?

1. AThe splitting of a heavy nucleus into smaller nuclei
2. BThe burning of uranium in oxygen
3. CThe loss of electrons from an atom
4. DThe joining of two light nuclei to form a heavier nucleus

Which property stays the same whether you have a small sample or a large sample of a pure substance?

1. AVolume
2. BDensity
3. CTotal heat content
4. DMass

ผสม H₂ 2 mol กับ O₂ 2 mol แล้วทำปฏิกิริยา 2H₂ + O₂ → 2H₂O สารตั้งต้นใดเป็นสารกำหนดปริมาณ

1. Aน้ำ เพราะเป็นผลิตภัณฑ์
2. Bไฮโดรเจน เพราะ H₂ 2 mol ใช้ O₂ เพียง 1 mol
3. Cไม่มีสารใด เพราะปริมาณเท่ากัน
4. Dออกซิเจน เพราะมีออกซิเจนน้อยกว่าไฮโดรเจน

Haemoglobin binds oxygen reversibly: Hb + O₂ ⇌ HbO₂. How does this equilibrium help deliver oxygen to tissues?

1. AHigh O₂ in tissues shifts it to the left, absorbing oxygen
2. BLow O₂ in tissues shifts it to the left, releasing oxygen
3. CLow O₂ in tissues shifts it to the right, releasing oxygen
4. DThe equilibrium does not change anywhere in the body