ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What kind of carbon–carbon bonds do alkanes contain?

1. AAt least one double bond
2. BAt least one triple bond
3. COnly single bonds
4. DIonic bonds

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

1. AIt increases
2. BThe balloon bursts
3. CIt stays exactly the same
4. DIt decreases

Which gas is needed for a fuel to burn (combustion)?

1. AOxygen
2. BNitrogen
3. CCarbon dioxide
4. DHelium

Which list is in order from smallest to largest mass?

1. AKilogram, gram, milligram
2. BMilligram, gram, kilogram
3. CGram, milligram, kilogram
4. DMilligram, kilogram, gram

A bag of 5% (w/v) glucose solution (called 5% dextrose in the US) contains 5 g of glucose per 100 mL. How many grams of glucose are in 1 L?

1. A0.5 g
2. B50 g
3. C500 g
4. D5 g

ที่อุณหภูมิคงที่ ปริมาตรของแก๊สลดลงครึ่งหนึ่ง ความดันจะเป็นอย่างไร

1. Aลดลงครึ่งหนึ่ง
2. Bเหลือหนึ่งในสี่
3. Cคงเดิม
4. Dเพิ่มเป็นสองเท่า

Diamond is extremely hard and has a very high melting point. Which explanation is correct?

1. AIt is held together by ionic bonds between C⁺ and C⁻ ions
2. BIt contains delocalised electrons like a metal
3. CEach carbon is covalently bonded to four others in a giant network
4. DIt is made of separate small molecules with strong forces between them

100 mL of 1 M NaCl is mixed with 100 mL of 3 M NaCl. What is the concentration of the mixture?

1. A4 M
2. B3 M
3. C2 M
4. D1.5 M