Chemistry for nursing entrance exams worksheet with answers

Which element is a metalloid?

1. AArgon
2. BSulfur
3. CSodium
4. DSilicon

Which two substances must be present for iron to rust?

1. AOxygen and water
2. BHydrogen and oxygen gas only
3. CCarbon dioxide and salt
4. DNitrogen and water

For a given substance, in which state do its particles move fastest?

1. AGas
2. BLiquid
3. CThey move at the same speed in all states
4. DSolid

When two monomers join to form a larger molecule and a water molecule is released, what is the reaction called?

1. AHydrolysis (splitting with water)
2. BCondensation (dehydration synthesis)
3. CCombustion
4. DNeutralisation

What does a buffer solution do?

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

What happens to the temperature of ice water while the ice is melting?

1. AIt falls below 0 °C
2. BIt rises steadily the whole time
3. CIt rises to 100 °C straight away
4. DIt stays at 0 °C until all the ice has melted

What is a triglyceride made of?

1. AThree glucose molecules joined together
2. BOne fatty acid joined to three glycerol molecules
3. CThree amino acids joined by peptide bonds
4. DOne glycerol molecule joined to three fatty acids

Hydrogen is usually placed at the top of group 1. Which statement about hydrogen is correct?

1. AIt has one valence electron like group 1 metals, but it is a nonmetal gas
2. BIt always forms H⁺ ions and never shares electrons
3. CIt has a full outer shell like the noble gases
4. DIt is an alkali metal that is solid at room temperature