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

Which electrons take part in chemical bonding?

1. AThe electrons closest to the nucleus
2. BAll electrons take part equally
3. CThe valence (outermost) electrons
4. DOnly the electrons in the first shell

What are the building blocks (monomers) of proteins?

1. AFatty acids
2. BSimple sugars
3. CNucleotides
4. DAmino acids

Which acid is found in the stomach?

1. ANitric acid
2. BHydrochloric acid
3. CSulfuric acid
4. DAcetic acid

A room is at 25 °C. What is this temperature in kelvin?

1. A−248 K
2. B248 K
3. C298 K
4. D77 K

Which assumption is made about an ideal gas?

1. AIts particles stay still at room temperature
2. BIts particles are large, closely packed and strongly attracted
3. CIts particles lose energy in every collision
4. DIts particles have no attraction to each other

How many molecules are in 2 mol of carbon dioxide?

1. A2,00 × 10²³
2. B1,20 × 10²⁴
3. C3,01 × 10²³
4. D6,02 × 10²³

Sulfuric acid reacts with sodium hydroxide: H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O. How many moles of NaOH neutralise 0,5 mol of H₂SO₄?

1. A0,25 mol
2. B1 mol
3. C2 mol
4. D0,5 mol

In the reaction NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq), which ions are spectator ions?

1. AAg⁺ and NO₃⁻
2. BAg⁺ and Cl⁻
3. CNa⁺ and NO₃⁻
4. DNa⁺ and Cl⁻