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 range does the common pH scale cover?

1. A1 to 10
2. B0 to 100
3. C0 to 14
4. D−7 to +7

What does the law of conservation of mass state?

1. AThe mass of products is always greater than the mass of reactants
2. BGases have no mass
3. CMass is neither created nor destroyed in a chemical reaction
4. DMass is lost as heat in every reaction

Какое соединение образуется между кальцием (Ca²⁺) и хлором (Cl⁻)?

1. ACaCl₂
2. BCaCl
3. CCa₂Cl
4. DCa₂Cl₃

How does ionisation energy (the energy needed to remove an outer electron) generally change from left to right across a period?

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

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

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

Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁵?

1. ASulfur
2. BArgon
3. CFluorine
4. DChlorine

Vitamin C is water-soluble and vitamin D is fat-soluble. What does this suggest about their molecules?

1. AVitamin C is polar, while vitamin D is mostly nonpolar
2. BBoth are equally polar
3. CVitamin C is nonpolar, while vitamin D is strongly polar
4. DBoth are ionic compounds