Chemia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

Where are the transition metals located on the periodic table?

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

What causes the pressure of a gas in a container?

1. AGas particles stopping and pushing outward
2. BGas particles sticking to the walls
3. CThe weight of the container pressing on the gas inside
4. DGas particles colliding with the container walls

What is a precipitate?

1. AA liquid that forms when a solid melts
2. BA gas that bubbles out when two solutions are mixed
3. CAn insoluble solid that forms when two solutions react
4. DA substance that speeds up a reaction

A student tests how temperature affects the rate of a reaction. What is the independent variable?

1. AThe reaction rate
2. BThe type of beaker used
3. CThe volume of acid, which is kept the same
4. DThe temperature

Jak roztwór o pH 3 wypada w porównaniu z roztworem o pH 5?

1. AMa taką samą liczbę jonów wodoru
2. BMa 2 razy więcej jonów wodoru
3. CMa 100 razy więcej jonów wodoru
4. DMa 100 razy mniej jonów wodoru

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

1. A4
2. B1
3. C2
4. D3

For N₂ + 3H₂ → 2NH₃, 1 mol of N₂ is mixed with 2 mol of H₂. Which reactant is limiting?

1. AH₂, because 1 mol of N₂ would need 3 mol of H₂
2. BN₂, because there is less of it
3. CNeither, because both are used up exactly
4. DNH₃, because it is the product

Frying an egg turns the clear egg white solid and white. What happens to the proteins?

1. AThey are hydrolysed, so the peptide bonds break into separate amino acids
2. BThey are burned to carbon dioxide and water
3. CThey are converted into fats
4. DThey are denatured: their shape changes, but the peptide bonds stay intact