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

Come sono disposti gli elementi nella tavola periodica moderna?

1. AIn base alla data di scoperta
2. BIn ordine crescente di numero atomico
3. CIn ordine alfabetico dei simboli
4. DIn ordine crescente di numero di neutroni

Which technique is used to separate the different coloured dyes in an ink?

1. ADistillation of the ink
2. BFiltration
3. CMagnetism
4. DChromatography

Which acid is found in the stomach?

1. AHydrochloric acid
2. BSulfuric acid
3. CAcetic acid
4. DNitric acid

What is the molar mass of sulfuric acid, H₂SO₄ (H = 1, S = 32, O = 16 g/mol)?

1. A50 g/mol
2. B49 g/mol
3. C98 g/mol
4. D96 g/mol

A plastic block has a density of 0,8 g/cm³. What happens when it is placed in water (density 1,0 g/cm³)?

1. AIt dissolves
2. BIt floats
3. CIt sinks
4. DIt stays suspended halfway down

What is the oxidation number of an element in its uncombined (elemental) form, such as Fe or O₂?

1. A+1
2. B−1
3. C0
4. DIt equals the group number

Quanti atomi ci sono in una molecola di glucosio, C₆H₁₂O₆?

1. A3
2. B18
3. C72
4. D24

A scuba diver breathes compressed air deep underwater. Why must the diver breathe out while swimming up to the surface?

1. AThe air in the lungs expands as the outside pressure falls
2. BOxygen turns to liquid at the surface
3. CThe water gets warmer near the surface
4. DThe air in the lungs shrinks as the outside pressure falls