Химия для вступительных экзаменов на сестринские программы: лист заданий с ответами

Which property is typical of nonmetals?

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

What is a molecule?

1. AA single atom with a positive charge
2. BA mixture of two different elements
3. CTwo or more atoms held together by covalent bonds
4. DThe nucleus of an atom

What is osmosis?

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

Which list is in order from smallest to largest mass?

1. AGram, milligram, kilogram
2. BMilligram, kilogram, gram
3. CKilogram, gram, milligram
4. DMilligram, gram, kilogram

What is the molar mass of sodium chloride, NaCl (Na = 23, Cl = 35,5 g/mol)?

1. A23 g/mol
2. B81,5 g/mol
3. C12,5 g/mol
4. D58,5 g/mol

How does dissolving salt in water affect the water's boiling point?

1. AIt makes the water boil at room temperature
2. BIt raises the boiling point slightly
3. CIt has no effect on the boiling point
4. DIt lowers the boiling point slightly

Какой ряд располагает элементы в порядке возрастания атомного радиуса?

1. AC, N, O, F
2. BNa, Mg, Al, Si
3. CF, O, N, C
4. DO, F, N, C

A nurse wipes a patient's arm with an alcohol swab and the patient says the skin feels cold. What explains this?

1. AThe alcohol absorbs heat from the skin as it evaporates
2. BThe alcohol reacts with the skin in an endothermic chemical reaction
3. CThe alcohol blocks the skin's nerve endings for warmth
4. DThe alcohol is stored at a much lower temperature than the room