Робочий аркуш «Хімія для вступних іспитів на медсестринство» з відповідями

What does the rate of a reaction measure?

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

What is an unsaturated solution?

1. AA solution with no solute at all
2. BA solution that holds the maximum possible solute
3. CA solution that can still dissolve more solute
4. DA solution with undissolved solid at the bottom

Що з наведеного є сполукою?

1. AВуглекислий газ (CO₂)
2. BГелій (He)
3. CЗалізо (Fe)
4. DГазоподібний кисень (O₂)

Rubbing alcohol evaporates faster than water at room temperature. What does this suggest?

1. AIt has a higher boiling point than water
2. BIts intermolecular forces are stronger than water's
3. CIts molecules are heavier than water molecules
4. DIts intermolecular forces are weaker than water's

A student tests how temperature affects the rate of a reaction. What is the independent variable?

1. AThe volume of acid, which is kept the same
2. BThe temperature
3. CThe type of beaker used
4. DThe reaction rate

Drops of water form on the outside of a glass of ice water. Where does this water come from?

1. AWater vapour in the air condenses on the cold glass
2. BThe ice evaporates through the glass
3. CWater leaks through tiny holes in the glass
4. DThe glass releases water when it gets cold

A catalyst is added to an exothermic reaction. How does the energy diagram change?

1. AThe peak is lower, but the energy of reactants and products stays the same
2. BThe reactants start at a higher energy
3. CThe reaction becomes endothermic
4. DThe products end up at a lower energy, so more heat is released

Яке рівняння правильно зрівноважене?

1. A2Na + Cl₂ → NaCl₂
2. BNa + Cl₂ → NaCl
3. CNa + Cl → NaCl₂
4. D2Na + Cl₂ → 2NaCl