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

Che cosa fa un catalizzatore?

1. ARallenta una reazione e si consuma
2. BAccelera una reazione senza consumarsi
3. CCambia i prodotti di una reazione
4. DFornisce i reagenti per una reazione

Quale di questi è un cambiamento fisico?

1. AIl pane tostato fino a dorarsi
2. BIl latte che inacidisce
3. CL'acqua che bolle e diventa vapore
4. DIl ferro che arrugginisce

Which method separates two liquids with different boiling points, such as alcohol and water?

1. ADistillation
2. BUsing a magnet
3. CSieving
4. DFiltration

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

How should the volume of water in a graduated cylinder be read?

1. AAt any angle, from the middle of the cylinder
2. BFrom below, at the highest point the water touches the glass
3. CFrom above the cylinder, at the top edge of the curved surface
4. DAt eye level, from the bottom of the curved surface (meniscus)

How does evaporation differ from boiling?

1. AEvaporation needs a higher temperature than boiling
2. BEvaporation happens only at the surface and at any temperature; boiling happens throughout the liquid at a set temperature
3. CEvaporation produces a solid, while boiling produces a gas
4. DEvaporation happens throughout the liquid at a set temperature; boiling happens only at the surface

A gas occupies 4 L at 2 atm and 200 K. What is its volume at 1 atm and 400 K?

1. A4 L
2. B1 L
3. C8 L
4. D16 L

Alkanes follow the general formula CₙH₂ₙ₊₂. What is the formula of the alkane with 4 carbon atoms?

1. AC₄H₆
2. BC₄H₁₀
3. CC₄H₁₂
4. DC₄H₈