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

Which three elements make up carbohydrates?

1. ACarbon, hydrogen and oxygen
2. BHydrogen, nitrogen and phosphorus
3. CCarbon, hydrogen and nitrogen
4. DCarbon, nitrogen and sulfur

Which property is typical of bases?

1. AThey taste sour
2. BThey turn blue litmus red
3. CThey have a pH below 7
4. DThey feel slippery

What is plasma, as a state of matter?

1. AA solid that conducts electricity
2. BThe liquid part of blood
3. CA liquid that has been cooled below its freezing point
4. DA very hot gas in which atoms have lost electrons and become ions

Quando un gas viene riscaldato in un contenitore rigido e sigillato, che cosa accade alla sua pressione?

1. AAumenta
2. BResta uguale
3. CScende a zero
4. DDiminuisce

Nitric acid (HNO₃) reacts with potassium hydroxide (KOH). Which salt forms?

1. APotassium nitrate, KNO₃
2. BPotassium hydride, KH
3. CPotassium nitrite, KNO₂
4. DNitrogen hydroxide, NOH

A reaction has ΔH = −890 kJ/mol. What does the negative sign tell you?

1. AThe reaction is endothermic
2. BThe reaction is at equilibrium
3. CThe reaction needs a catalyst
4. DThe reaction is exothermic

Hydrogen peroxide fizzes when poured on a cut because an enzyme in blood breaks it down. What gas is produced, and what type of reaction is it?

1. AChlorine, in a synthesis reaction
2. BCarbon dioxide, in a combustion reaction
3. CHydrogen, in a single replacement reaction
4. DOxygen, in a decomposition reaction

Why does a burn from steam at 100 °C usually cause more damage than one from liquid water at 100 °C?

1. ALiquid water cannot pass any of its heat to the skin
2. BSteam releases a large amount of extra energy as it condenses on the skin
3. CSteam particles are hotter than water particles at the same reading
4. DSteam carries dissolved acid that damages the skin