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

Which property is typical of nonmetals?

1. AThey easily lose electrons to form positive ions
2. BThey are all solids at room temperature
3. CThey are poor conductors of heat and electricity
4. DThey are shiny and easily bent into wires

What is the change from a gas directly to a solid, skipping the liquid state, called?

1. ACondensation
2. BSublimation
3. CFreezing
4. DDeposition

What is osmosis?

1. AThe breaking of a solid into ions
2. BThe movement of solute particles against a gradient using energy
3. CThe dissolving of a gas in a liquid
4. DThe movement of water across a semipermeable membrane

Why does water boil at a lower temperature at the top of a high mountain?

1. AThere is less oxygen dissolved in the water up there
2. BThe air pressure is lower, so less vapour pressure is needed to boil
3. CThe air is colder, so the water loses heat and boils sooner
4. DGravity is weaker, so the molecules escape more easily

Which coefficients balance __KClO₃ → __KCl + __O₂?

1. A2, 1, 3
2. B1, 1, 1
3. C1, 1, 3
4. D2, 2, 3

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 reaction rate
3. CThe temperature
4. DThe type of beaker used

Який зразок містить найбільшу кількість атомів?

1. A1 mol He
2. B1 mol CH₄
3. C1 mol H₂O
4. D1 mol O₂

Diamond is extremely hard and has a very high melting point. Which explanation is correct?

1. AIt is made of separate small molecules with strong forces between them
2. BIt contains delocalised electrons like a metal
3. CIt is held together by ionic bonds between C⁺ and C⁻ ions
4. DEach carbon is covalently bonded to four others in a giant network