ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What are the usual units of molar mass?

1. Ag/mol
2. Bmol/L
3. Cg/L
4. Dmol/g

What colour does blue litmus paper turn in an acid?

1. ABlue (no change)
2. BGreen
3. CRed
4. DPurple

What does organic chemistry study?

1. ACompounds made of metals
2. BOnly compounds found in plants
3. COnly the noble gases
4. DCompounds based on carbon

A solution has a pH of 10. What is its pOH at 25 °C?

1. A10
2. B4
3. C14
4. D24

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. A50 g
2. B500 g
3. C5 g
4. D0.5 g

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. A41,800 J
2. B418 J
3. C41.8 J
4. D4180 J

Starch and cellulose are both made entirely of glucose units, yet humans can digest starch but not cellulose. Why?

1. ACellulose is really made of amino acids, not glucose, so stomach acid cannot break it
2. BStarch contains nitrogen, which makes it easier to digest
3. CCellulose dissolves in water, so it is lost from the gut
4. DThe glucose units are linked differently, and humans lack an enzyme to break cellulose's links

A compound is 40% carbon, 6.7% hydrogen and 53.3% oxygen by mass (C = 12, H = 1, O = 16). What is its empirical formula?

1. ACHO
2. BC₂HO
3. CCH₂O
4. DCH₄O