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

Plants absorb energy from sunlight during photosynthesis. How is photosynthesis classified?

1. ANuclear
2. BNeutralisation
3. CEndothermic
4. DExothermic

What does the prefix "milli-" mean?

1. AOne-hundredth (10⁻²)
2. BOne thousand (10³)
3. COne-thousandth (10⁻³)
4. DOne-millionth (10⁻⁶)

Что из перечисленного является соединением?

1. AЖелезо (Fe)
2. BУглекислый газ (CO₂)
3. CГелий (He)
4. DГазообразный кислород (O₂)

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

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

Using significant figures, what is 2,5 cm × 3,42 cm?

1. A8,550 cm²
2. B9 cm²
3. C8,6 cm²
4. D8,55 cm²

What is the name of the molecular compound CO?

1. AMonocarbon oxide
2. BCarbon dioxide
3. CCarbon oxide
4. DCarbon monoxide

Концентрация ионов водорода в растворе равна 1 × 10⁻⁹ моль/л. Каков его pH и является ли он кислым или основным?

1. ApH 5, кислый
2. BpH 9, основный
3. CpH −9, кислый
4. DpH 9, кислый

Why is gamma radiation used to sterilise sealed medical supplies such as syringes?

1. AIt is stopped by the packaging, so it only cleans the outside
2. BIt heats the items to very high temperatures, so the microbes are burned away inside the pack
3. CIt passes through the packaging and kills microbes without making the items radioactive
4. DIt adds a protective chemical coating to the items