ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What is a hydrocarbon?

1. AA compound made of hydrogen and oxygen
2. BAny compound that dissolves in water
3. CA compound made of only hydrogen and carbon
4. DA carbon atom with a positive charge

Which element is a metalloid?

1. ASodium
2. BSilicon
3. CArgon
4. DSulfur

What is a beta particle?

1. AA helium nucleus with two protons and two neutrons
2. BA wave of visible light
3. CA neutron that leaves the nucleus
4. DA high-energy electron released from a nucleus

สัมประสิทธิ์ชุดใดดุลสมการ __H₂ + __O₂ → __H₂O

1. A1, 1, 1
2. B1, 2, 1
3. C2, 1, 2
4. D2, 2, 2

How much heat is needed to raise the temperature of 100 g of water by 10 °C (specific heat of water = 4.18 J/g·°C)?

1. A418 J
2. B4180 J
3. C41,800 J
4. D41.8 J

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

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

Water is split as 2H₂O → 2H₂ + O₂. What volume of O₂ at STP (0 °C and 1 atm) forms from 2 mol of water?

1. A22.4 L
2. B11.2 L
3. C67.2 L
4. D44.8 L

Ethene has the structure H₂C=CH₂. How many electrons are shared between the two carbon atoms?

1. A8
2. B6
3. C4
4. D2