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

What does the rate of a reaction measure?

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

Как называется переход непосредственно из твёрдого состояния в газообразное?

1. AДесублимация
2. BКонденсация
3. CПлавление
4. DСублимация

What is the change from a gas to a liquid called?

1. AEvaporation
2. BCondensation
3. CSublimation
4. DFreezing

How does atomic radius change going down a group?

1. AIt decreases
2. BIt decreases, then increases
3. CIt increases
4. DIt stays the same

At STP (0 °C and 1 atm), what volume does 1 mole of an ideal gas occupy?

1. A273 L
2. B1,0 L
3. C22,4 L
4. D6,02 L

On an energy diagram, the products are at a lower energy than the reactants. What kind of reaction is shown?

1. AReversible only
2. BExothermic
3. CNuclear
4. DEndothermic

A scuba diver breathes compressed air deep underwater. Why must the diver breathe out while swimming up to the surface?

1. AThe air in the lungs shrinks as the outside pressure falls
2. BThe water gets warmer near the surface
3. COxygen turns to liquid at the surface
4. DThe air in the lungs expands as the outside pressure falls

Water is split as 2H₂O → 2H₂ + O₂. What volume of O₂ at STP (0 °C and 1 atm) forms from 2 mol of water?

1. A22,4 L
2. B11,2 L
3. C44,8 L
4. D67,2 L