Chemistry for nursing entrance exams worksheet with answers

What is an electrolyte?

1. AA substance that forms ions and conducts electricity when dissolved in water
2. BA substance that dissolves as whole molecules without forming any ions
3. CA gas that dissolves in blood
4. DA metal that conducts electricity as a solid

Which type of bond holds sodium chloride (table salt) together?

1. AMetallic bonding
2. BHydrogen bonding
3. CCovalent bonding
4. DIonic bonding

What is absolute zero?

1. A0 K, about −273 °C, the lowest possible temperature
2. B0 °C, the point at which pure water freezes into ice
3. C−100 °C, the coldest temperature on Earth
4. D0 °F, the temperature of a salt and ice mixture

What are isomers?

1. AMolecules that contain the same number of bonds
2. BAtoms of the same element with different numbers of neutrons
3. CCompounds with the same structure but different molecular formulas
4. DCompounds with the same molecular formula but different structures

In a reaction at equilibrium, a product is continuously removed. What happens?

1. AThe equilibrium shifts to the left to form more reactants
2. BMore product keeps forming as the equilibrium shifts to the right
3. CThe reaction rate drops to zero
4. DThe reactants run out immediately

In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, which species loses electrons?

1. ACu
2. BCu²⁺
3. CZn
4. DZn²⁺

Equal masses of sand and water sit in the sun and absorb the same amount of heat. Which warms up more, and why?

1. ASand, because it has a lower specific heat capacity than water
2. BWater, because it has a higher specific heat capacity than sand
3. CBoth warm equally, because they absorbed the same heat
4. DSand, because it has a higher specific heat capacity than water

Under which conditions does a real gas behave least like an ideal gas?

1. AHigh temperature and large container
2. BLow pressure and high temperature
3. CLow pressure and low volume of particles
4. DHigh pressure and low temperature