Chemistry for nursing entrance exams worksheet with answers

What is a solution?

1. AA pure compound made of two elements
2. BA mixture in which particles settle out on standing
3. CA solid that has been melted
4. DA mixture that is the same throughout (homogeneous)

What range does the common pH scale cover?

1. A0 to 100
2. B0 to 14
3. C−7 to +7
4. D1 to 10

What is a cation?

1. AA molecule with no charge
2. BA positively charged ion
3. CA neutral atom
4. DA negatively charged ion

What does a buffer solution do?

1. AIt speeds up neutralisation reactions so that the pH quickly reaches exactly 7
2. BIt turns any acid into a strong base
3. CIt keeps the temperature of a solution constant
4. DIt resists pH changes when a little acid or base is added

Vinegar contains acetic acid, CH₃COOH. Which functional group makes it an acid?

1. AThe carboxyl group, –COOH
2. BThe hydroxyl group of an alcohol, –OH
3. CThe methyl group, –CH₃
4. DThe amino group, –NH₂

What is the name of the molecular compound CO?

1. ACarbon oxide
2. BCarbon monoxide
3. CCarbon dioxide
4. DMonocarbon oxide

Which list puts the elements in order of increasing atomic radius?

1. AC, N, O, F
2. BNa, Mg, Al, Si
3. CO, F, N, C
4. DF, O, N, C

Frying an egg turns the clear egg white solid and white. What happens to the proteins?

1. AThey are hydrolysed, so the peptide bonds break into separate amino acids
2. BThey are denatured: their shape changes, but the peptide bonds stay intact
3. CThey are converted into fats
4. DThey are burned to carbon dioxide and water