Scheda di esercizi di Chimica per i test di ammissione a infermieristica con soluzioni

Which three elements make up carbohydrates?

1. ACarbon, hydrogen and nitrogen
2. BCarbon, nitrogen and sulfur
3. CHydrogen, nitrogen and phosphorus
4. DCarbon, hydrogen and oxygen

What is a dilute solution?

1. AOne with a large amount of solute in a little solvent
2. BOne with no solvent at all
3. COne in which the solute has reacted with the solvent
4. DOne with a small amount of solute in a lot of solvent

In quale stato della materia le particelle hanno forma e volume fissi?

1. ASolido
2. BGas
3. CPlasma
4. DLiquido

What is the formula of sodium sulfate, made from Na⁺ and SO₄²⁻ ions?

1. ANaSO₄
2. BNa₂SO₄
3. CNa(SO₄)₂
4. DNa₄SO₂

How many covalent bonds does a carbon atom usually form?

1. A3
2. B2
3. C1
4. D4

Come influisce di solito una temperatura più alta sulla quantità di solido che si scioglie in acqua?

1. ANon ha effetto sui solidi
2. BSi scioglie più solido
3. CIl solido si trasforma in gas
4. DSi scioglie meno solido

Which compound contains both ionic and covalent bonds?

1. ASodium chloride, NaCl
2. BWater, H₂O
3. CMethane, CH₄
4. DSodium sulfate, Na₂SO₄

Hyperbaric oxygen therapy places a patient in a chamber with oxygen at higher than normal pressure. Why does this raise the oxygen dissolved in blood plasma?

1. AHigher pressure turns the oxygen into a liquid
2. BGas solubility in a liquid increases with the partial pressure of the gas
3. CHigher pressure makes red blood cells divide faster
4. DHigher pressure lowers body temperature, so the blood can hold much more gas