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

What is the formula of methane, the main gas in natural gas?

1. ACH₄
2. BCO₂
3. CC₂H₆
4. DCH₂

What is gamma radiation?

1. AA slow-moving electron
2. BA fast stream of protons from the nucleus
3. CHigh-energy electromagnetic radiation with no mass or charge
4. DA stream of helium nuclei with a positive charge

What should a student always wear to protect the eyes when working with chemicals?

1. ASafety goggles
2. BContact lenses
3. CReading glasses
4. DSunglasses

Water climbs up a narrow glass tube. Which property mainly causes this?

1. AEvaporation of water from the tube
2. BWater's high boiling point
3. CAdhesion of water to the glass
4. DLow density of water

Un atomo di magnesio perde due elettroni. Qual è lo ione che si forma?

1. AMg⁺
2. BMg²⁺
3. CMg²⁻
4. DMg⁻

Che cosa accade alla temperatura dell'acqua con ghiaccio mentre il ghiaccio fonde?

1. ASale costantemente per tutto il tempo
2. BSale subito a 100 °C
3. CScende sotto 0 °C
4. DResta a 0 °C finché tutto il ghiaccio non è fuso

Half-normal saline (0,45% NaCl) is compared with blood plasma, which has about the same concentration as 0,9% NaCl. How is 0,45% NaCl described, and what happens to red blood cells placed in it?

1. AHypertonic; salt moves into the cells, which then swell
2. BHypertonic; water tends to move out of the cells, which shrink
3. CHypotonic; water tends to move into the cells, which swell
4. DIsotonic; water moves equally in and out, so the cells keep their shape

A solution of a strong acid has pH 2. It is diluted with water to 10 times its original volume. What is the new pH?

1. A3
2. B0,2
3. C20
4. D1