Chemistry for nursing entrance exams worksheet with answers

Which state of matter has a fixed volume but takes the shape of its container?

1. ALiquid
2. BSolid
3. CPlasma
4. DGas

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

1. AThey move at the same speed in all states
2. BGas
3. CLiquid
4. DSolid

An instant cold pack feels cold when the substance inside dissolves. How is this dissolving process classified?

1. AA combustion reaction
2. BA neutralisation reaction
3. CExothermic
4. DEndothermic

Oxygen has 8 electrons. What is its electron configuration?

1. A1s² 2s⁶
2. B1s² 2p⁶
3. C1s² 2s² 2p⁶
4. D1s² 2s² 2p⁴

What does Avogadro's law state?

1. AOne mole of any gas has a mass of 22.4 g
2. BThe pressure of a gas doubles when its temperature is halved
3. CEqual masses of all gases contain equal numbers of molecules under any conditions
4. DEqual volumes of gases at the same temperature and pressure contain equal numbers of molecules

How does increasing the temperature usually affect the rate of a reaction?

1. AIt stops the reaction completely
2. BIt decreases the rate
3. CIt increases the rate
4. DIt has no effect on the rate

In the Bohr model, what happens when an electron drops from a higher energy level to a lower one?

1. AThe atom gains a proton
2. BThe electron leaves the atom
3. CEnergy is absorbed from the surroundings
4. DEnergy is released, often as light

In terms of bonds, why is a reaction exothermic?

1. ANo bonds are broken in exothermic reactions
2. BMore energy is released forming new bonds than is absorbed breaking old ones
3. CForming bonds always absorbs energy
4. DMore energy is absorbed breaking old bonds than is released forming new ones