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

Nella reazione AB → A + B, che tipo di reazione è rappresentata?

1. ADecomposizione
2. BSintesi
3. CDoppio scambio
4. DNeutralizzazione

Come si chiama il passaggio da liquido a gas?

1. ACongelamento
2. BFusione
3. CCondensazione
4. DEvaporazione (vaporizzazione)

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

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

Rubbing alcohol evaporates faster than water at room temperature. What does this suggest?

1. AIts intermolecular forces are stronger than water's
2. BIts intermolecular forces are weaker than water's
3. CIts molecules are heavier than water molecules
4. DIt has a higher boiling point than water

When the diaphragm contracts and the chest cavity gets bigger, what happens to the air pressure inside the lungs?

1. AIt falls, so air flows out
2. BIt does not change
3. CIt falls, so air flows in
4. DIt rises, so air flows in

When water boils, what is overcome?

1. AThe covalent O–H bonds inside each molecule
2. BThe forces holding the oxygen nucleus together
3. CThe ionic bonds between H⁺ and O²⁻
4. DHydrogen bonds between water molecules

A compound is a gas at room temperature, does not conduct electricity in any state, and is made of two nonmetals. What kind of substance is it most likely?

1. AA simple molecular (covalent) substance
2. BA giant covalent network solid
3. CAn ionic compound (a lattice of ions)
4. DA metal with delocalised electrons