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

What is the name for the attraction of water molecules to each other?

1. AOsmosis
2. BCohesion
3. CAdhesion
4. DDiffusion

Where are the transition metals located on the periodic table?

1. AIn group 1 on the far left
2. BAbove the noble gases
3. CIn group 18 on the far right
4. DIn the central block, groups 3 to 12

Quale tipo di legame tiene insieme il cloruro di sodio (sale da cucina)?

1. AIl legame metallico
2. BIl legame a idrogeno
3. CIl legame covalente
4. DIl legame ionico

How does a catalyst speed up a reaction?

1. AIt provides a different pathway with a lower activation energy
2. BIt raises the temperature of the reactants so they move faster
3. CIt makes the reaction more exothermic
4. DIt adds extra reactant to the mixture

In the balanced equation __Mg + __HCl → __MgCl₂ + __H₂, what is the coefficient of HCl?

1. A1
2. B2
3. C3
4. D4

Quale elemento è il più elettronegativo?

1. AL'elio
2. BIl ferro
3. CIl fluoro
4. DIl sodio

100 mL of 1 M NaCl is mixed with 100 mL of 3 M NaCl. What is the concentration of the mixture?

1. A3 M
2. B2 M
3. C1,5 M
4. D4 M

A compound has the empirical formula CH₂ and a molar mass of 42 g/mol (C = 12, H = 1). What is its molecular formula?

1. AC₄H₈
2. BC₂H₄
3. CC₃H₆
4. DCH₂