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

Какой тип реакции показан в реакции AB → A + B?

1. AРазложение
2. BНейтрализация
3. CОбмен
4. DСоединение

A blown-up balloon is put in a freezer. What happens to its volume?

1. AIt increases
2. BIt decreases
3. CThe balloon bursts
4. DIt stays exactly the same

What is the change from a gas directly to a solid, skipping the liquid state, called?

1. AFreezing
2. BSublimation
3. CCondensation
4. DDeposition

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

1. ACa₂Cl
2. BCaCl
3. CCa₂Cl₃
4. DCaCl₂

When the diaphragm contracts and the chest cavity gets bigger, what happens to the air pressure inside the lungs?

1. AIt rises, so air flows in
2. BIt falls, so air flows in
3. CIt does not change
4. DIt falls, so air flows out

A radioactive isotope has a half-life of 5 days. A sample starts with 80 g. How much is left after 10 days?

1. A0 g
2. B20 g
3. C10 g
4. D40 g

What is the net ionic equation for the neutralisation of any strong acid by any strong base?

1. AH₂ + O₂ → H₂O₂
2. BH⁺ + Cl⁻ → HCl
3. CNa⁺ + Cl⁻ → NaCl
4. DH⁺ + OH⁻ → H₂O

Half-normal saline (0,45% NaCl) is compared with blood plasma, which has about the same concentration as 0,9% NaCl. How is 0,45% NaCl described, and what happens to red blood cells placed in it?

1. AHypertonic; salt moves into the cells, which then swell
2. BHypotonic; water tends to move into the cells, which swell
3. CIsotonic; water moves equally in and out, so the cells keep their shape
4. DHypertonic; water tends to move out of the cells, which shrink