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

What is the SI unit of pressure?

1. ALitre (L)
2. BJoule (J)
3. CNewton (N)
4. DPascal (Pa)

In a chemical reaction, what is the limiting reactant?

1. AThe reactant that runs out first and stops the reaction
2. BThe reactant that is left over at the end
3. CThe reactant with the largest mass
4. DThe catalyst that controls the speed

Which property is typical of nonmetals?

1. AThey are shiny and easily bent into wires
2. BThey easily lose electrons to form positive ions
3. CThey are poor conductors of heat and electricity
4. DThey are all solids at room temperature

Percorrendo un periodo da sinistra a destra, come cambia in generale il raggio atomico?

1. AResta esattamente uguale
2. BPrima raddoppia, poi si dimezza
3. CDiminuisce
4. DAumenta

When two monomers join to form a larger molecule and a water molecule is released, what is the reaction called?

1. AHydrolysis (splitting with water)
2. BNeutralisation
3. CCombustion
4. DCondensation (dehydration synthesis)

In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, which species loses electrons?

1. ACu²⁺
2. BCu
3. CZn²⁺
4. DZn

What is (8 × 10⁶) ÷ (2 × 10⁻²)?

1. A4 × 10⁻¹²
2. B4 × 10⁸
3. C16 × 10⁴
4. D4 × 10⁴

Which pair of substances could form a buffer solution?

1. AHydrochloric acid (HCl) and sodium hydroxide (NaOH)
2. BCarbonic acid (H₂CO₃) and bicarbonate (HCO₃⁻)
3. CSodium chloride (NaCl) and water
4. DHydrochloric acid (HCl) and chloride (Cl⁻)