ورقة عمل الكيمياء لامتحانات القبول في التمريض مع الإجابات

Which group of biological molecules includes fats, oils and cholesterol?

1. ANucleic acids
2. BCarbohydrates
3. CLipids
4. DProteins

What does the rate of a reaction measure?

1. AHow quickly reactants are used up or products are formed
2. BHow hot the reaction gets
3. CHow much energy the final products contain
4. DHow much product forms in total by the end

What is the SI unit of energy?

1. AKelvin
2. BWatt
3. CNewton
4. DJoule

What is the molar mass of sulfuric acid, H₂SO₄ (H = 1, S = 32, O = 16 g/mol)?

1. A96 g/mol
2. B98 g/mol
3. C49 g/mol
4. D50 g/mol

What is carbon-14 dating used for?

1. ADetecting carbon monoxide in a room
2. BMeasuring body temperature
3. CFinding the exact age of rocks that are billions of years old
4. DEstimating the age of material that was once alive

A solution has a pH of 2. What is its hydrogen ion concentration?

1. A1 × 10² mol/L
2. B1 × 10⁻¹² mol/L
3. C2 mol/L
4. D1 × 10⁻² mol/L

5,85 g of NaCl (molar mass 58,5 g/mol) is dissolved to make 500 mL of solution. What is the molarity?

1. A0,05 M
2. B0,1 M
3. C0,2 M
4. D2 M

Why does drinking seawater make dehydration worse?

1. ASeawater is hypotonic, so water rushes into cells and makes them burst
2. BSeawater is isotonic, so it cannot be absorbed
3. CSeawater contains no water molecules the body can use
4. DSeawater is hypertonic, so the body loses extra water getting rid of the salt