ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What do the letters STP stand for in gas chemistry?

1. AStandard time and pressure
2. BStandard temperature and pressure
3. CSpecific temperature and particles
4. DStable temperature point

What is the formula of methane, the main gas in natural gas?

1. ACH₄
2. BCH₂
3. CCO₂
4. DC₂H₆

ที่ระดับน้ำทะเล น้ำบริสุทธิ์เดือดที่อุณหภูมิเท่าใด

1. A0 °C (32 °F)
2. B50 °C (122 °F)
3. C37 °C (98.6 °F)
4. D100 °C (212 °F)

Which gas forms when hydrochloric acid reacts with calcium carbonate?

1. AHydrogen
2. BOxygen
3. CCarbon dioxide
4. DChlorine

การเพิ่มอุณหภูมิมักส่งผลต่ออัตราการเกิดปฏิกิริยาอย่างไร

1. Aทำให้ปฏิกิริยาหยุดโดยสิ้นเชิง
2. Bเพิ่มอัตรา
3. Cลดอัตรา
4. Dไม่มีผลต่ออัตรา

Water climbs up a narrow glass tube. Which property mainly causes this?

1. AEvaporation of water from the tube
2. BLow density of water
3. CAdhesion of water to the glass
4. DWater's high boiling point

Half-normal saline (0.45% NaCl) is compared with blood plasma, which has about the same concentration as 0.9% NaCl. How is 0.45% NaCl described, and what happens to red blood cells placed in it?

1. AHypertonic; water tends to move out of the cells, which shrink
2. BHypotonic; water tends to move into the cells, which swell
3. CIsotonic; water moves equally in and out, so the cells keep their shape
4. DHypertonic; salt moves into the cells, which then swell

At room temperature chlorine (Cl₂) is a gas, bromine (Br₂) is a liquid and iodine (I₂) is a solid. What best explains this trend?

1. AIodine forms hydrogen bonds but chlorine does not
2. BChlorine is ionic, while iodine is metallic
3. CThe covalent bond in I₂ is much stronger than in Cl₂
4. DLarger molecules with more electrons have stronger dispersion forces