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

Which acid is found in the stomach?

1. AAcetic acid
2. BNitric acid
3. CHydrochloric acid
4. DSulfuric acid

What does organic chemistry study?

1. ACompounds based on carbon
2. BOnly compounds found in plants
3. COnly the noble gases
4. DCompounds made of metals

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

1. ADistillation
2. BSieving
3. CFiltration
4. DUsing a magnet

Which measurement has three significant figures?

1. A0,00560
2. B5,0006
3. C56
4. D0,0056

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 happens throughout the liquid at a set temperature; boiling happens only at the surface
4. DEvaporation produces a solid, while boiling produces a gas

How many covalent bonds does a carbon atom usually form?

1. A3
2. B1
3. C2
4. D4

At the top of a high mountain, air still contains about 21% oxygen. Why do climbers still get less oxygen with each breath?

1. ACold air contains no oxygen
2. BOxygen is heavier, so it all sinks to sea level
3. CThe total air pressure is lower, so the partial pressure of oxygen is lower
4. DThe percentage of oxygen in the air falls sharply as you climb higher

Quale volume di una soluzione madre 6 M serve per preparare 300 mL di una soluzione 2 M?

1. A150 mL
2. B50 mL
3. C100 mL
4. D900 mL