Химия для вступительных экзаменов на сестринские программы: лист заданий с ответами
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Имя: ____________________ Дата: ____________
1.Лёгкая
Какой тип реакции показан в реакции AB → A + B?
AРазложение
BСоединение
CОбмен
DНейтрализация
2.Лёгкая
What does organic chemistry study?
AOnly the noble gases
BOnly compounds found in plants
CCompounds based on carbon
DCompounds made of metals
3.Лёгкая
What is a hydrocarbon?
AA carbon atom with a positive charge
BA compound made of only hydrogen and carbon
CA compound made of hydrogen and oxygen
DAny compound that dissolves in water
4.Средняя
Сколько молей содержится в 88 г углекислого газа (молярная масса 44 г/моль)?
A3872 моль
B2 моль
C44 моль
D0,5 моль
5.Средняя
During digestion, large molecules are broken down by adding water across their bonds. What is this reaction called?
ACombustion
BCondensation
CHydrolysis
DPolymerisation
6.Средняя
In a closed container, 10 g of substance A reacts completely with 5 g of substance B. What is the total mass of the products?
A5 g
B15 g
C50 g
D10 g
7.Сложная
Olive oil is liquid at room temperature, while butter is solid. Which explanation is correct?
AOlive oil has no C=C double bonds, so its chains stay straight and pack tightly
BButter contains more water, which freezes at room temperature
COlive oil molecules are ionic, while butter molecules are covalent
DOlive oil has more C=C double bonds, which kink the chains so they cannot pack closely
8.Сложная
Raising the temperature by 10 °C can roughly double the rate of many reactions. What is the main reason?
AThe activation energy itself is lowered by the extra heat
BThe particles become larger and easier to hit
CThe reaction becomes more exothermic
DMany more collisions have at least the activation energy
Ответы
1. A · Разложение
2. C · Compounds based on carbon
3. B · A compound made of only hydrogen and carbon
4. B · 2 моль
5. C · Hydrolysis
6. B · 15 g
7. D · Olive oil has more C=C double bonds, which kink the chains so they cannot pack closely
8. D · Many more collisions have at least the activation energy
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