Химия для вступительных экзаменов на сестринские программы: лист заданий с ответами
Бесплатный лист заданий для печати по теме «Химия для вступительных экзаменов на сестринские программы»: 8 задач от простых до экзаменационного уровня, с ответами. Распечатайте его или сохраните как PDF.
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1.Лёгкая
Which property is typical of nonmetals?
AThey are poor conductors of heat and electricity
BThey easily lose electrons to form positive ions
CThey are shiny and easily bent into wires
DThey are all solids at room temperature
2.Лёгкая
What is an alloy?
AA compound formed when a metal reacts with oxygen
BA mixture of a metal with one or more other elements
CA nonmetal that conducts electricity
DA pure metal in its natural state
3.Лёгкая
Что такое ион?
AАтом, у которого в ядре больше нейтронов, чем у других атомов
BМолекула из двух одинаковых атомов
CЧастица без электронов
DАтом или группа атомов с электрическим зарядом
4.Средняя
Why must temperatures be in kelvin in gas law calculations?
AThe kelvin scale has smaller degrees, which gives more precise answers
BGas volume and pressure are proportional to the absolute temperature
CKelvin values are always below 100
DCelsius can only be used for liquids
5.Средняя
Why does keeping food in a refrigerator slow down spoilage?
ALower temperatures raise the activation energy of every reaction
BCold air contains no oxygen
CLower temperatures slow down chemical and microbial reactions
DCold temperatures add preservatives to the food
6.Средняя
Which type of radiation can be stopped by a sheet of paper?
AAlpha particles
BGamma rays
CX-rays
DBeta particles (fast electrons)
7.Сложная
Samples of hydrogen gas (H₂) and oxygen gas (O₂) are at the same temperature. Which statement is correct?
AThey have the same average kinetic energy, but H₂ molecules move faster
BO₂ molecules move faster because they are heavier
CH₂ molecules have more kinetic energy and move faster
DBoth move at the same average speed
8.Сложная
How does soap help remove grease from skin?
ASoap makes the grease more dense so it sinks
BSoap molecules are completely nonpolar, so they dissolve grease like a solvent
CEach soap molecule has a polar end that attracts water and a nonpolar end that attracts grease
DSoap reacts with grease to form water and carbon dioxide
Ответы
1. A · They are poor conductors of heat and electricity
2. B · A mixture of a metal with one or more other elements
3. D · Атом или группа атомов с электрическим зарядом
4. B · Gas volume and pressure are proportional to the absolute temperature
5. C · Lower temperatures slow down chemical and microbial reactions
6. A · Alpha particles
7. A · They have the same average kinetic energy, but H₂ molecules move faster
8. C · Each soap molecule has a polar end that attracts water and a nonpolar end that attracts grease
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