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

Che cosa producono un acido e una base quando si neutralizzano a vicenda?

1. ASolo anidride carbonica
2. BUn acido più forte
3. CUn sale e acqua
4. DUn metallo e idrogeno gassoso

For a given substance, in which state do its particles move fastest?

1. AThey move at the same speed in all states
2. BLiquid
3. CSolid
4. DGas

Which process is exothermic (releases heat)?

1. APhotosynthesis
2. BEvaporating water
3. CMelting a block of ice
4. DBurning methane gas

0,5 mol of KCl is dissolved to make 250 mL of solution. What is its molarity?

1. A0,125 M
2. B2 M
3. C0,5 M
4. D125 M

To which family of organic compounds does ethanol, C₂H₅OH, belong?

1. AAlkanes
2. BCarboxylic acids
3. CAlcohols
4. DEsters

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

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

Why is it easier to remove the outer electron from a potassium atom than from a lithium atom?

1. ALithium has more electron shells than potassium
2. BPotassium has fewer protons, so its nucleus pulls much more weakly on every electron
3. CPotassium's outer electron is farther from the nucleus and more shielded by inner electrons
4. DPotassium's outer electron is in a full shell

Perché l'olio non si scioglie in acqua?

1. AL'olio reagisce con l'acqua formando un solido
2. BL'olio è apolare e l'acqua è polare, e «il simile scioglie il simile»
3. CL'acqua è troppo densa per mescolarsi con qualsiasi cosa
4. DLe molecole dell'olio sono ioni carichi