Chemia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

According to collision theory, what must happen for particles to react?

1. AThey must stay completely still next to each other
2. BThey must have the same mass
3. CThey must collide with enough energy and the right orientation
4. DThey must both be in the solid state at the same time

What is a cation?

1. AA molecule with no charge
2. BA positively charged ion
3. CA negatively charged ion
4. DA neutral atom

What is a beta particle?

1. AA helium nucleus with two protons and two neutrons
2. BA high-energy electron released from a nucleus
3. CA neutron that leaves the nucleus
4. DA wave of visible light

Which bond joins amino acids together in a protein?

1. AA hydrogen bond
2. BA glycosidic bond
3. CAn ionic bond
4. DA peptide bond

What are London dispersion forces?

1. AWeak, temporary attractions caused by shifting electrons in molecules
2. BStrong bonds formed by transferring electrons
3. CForces that hold protons together in the nucleus
4. DAttractions between a hydrogen atom and a metal ion

What is the oxidation number of sulfur in H₂SO₄?

1. A−2
2. B+4
3. C+2
4. D+6

Which phrase best describes a 0,001 M solution of hydrochloric acid?

1. AA dilute solution of a weak acid
2. BA concentrated solution of a weak acid
3. CA dilute solution of a strong acid
4. DA concentrated solution of a strong acid

A reaction at equilibrium has a very large equilibrium constant (K much greater than 1). What does this tell you?

1. AAt equilibrium, the mixture contains mostly products
2. BAt equilibrium, the mixture contains mostly reactants
3. CThe reaction is very fast
4. DThe reaction cannot reach equilibrium