Химия для вступительных экзаменов на сестринские программы: лист заданий с ответами

What are the usual units of molar mass?

1. Ag/mol
2. Bmol/L
3. Cg/L
4. Dmol/g

Which functional group is found in all alcohols?

1. ACarbonyl group (C=O) only
2. BCarboxyl group (–COOH)
3. CAmino group (–NH₂)
4. DHydroxyl group (–OH)

In a solution, what is the solvent?

1. AThe substance that is dissolved, usually present in the smaller amount
2. BThe substance that does the dissolving, usually present in the larger amount
3. CThe gas given off when a solid dissolves
4. DAny solid that will not dissolve, however long it is stirred

Какова молярная масса воды (H = 1 г/моль, O = 16 г/моль)?

1. A18 г/моль
2. B17 г/моль
3. C32 г/моль
4. D10 г/моль

How is 0,00045 written in scientific notation?

1. A4,5 × 10⁻⁴
2. B4,5 × 10⁻³
3. C4,5 × 10⁴
4. D4,5 × 10⁻⁵

Вы разбавляете 100 мл 2 М раствора до общего объёма 400 мл. Какова новая концентрация?

1. A0,5 М
2. B1 М
3. C8 М
4. D2 М

Сколько граммов NaOH (молярная масса 40 г/моль) нужно для приготовления 500 мл 0,2 М раствора?

1. A40 г
2. B4 г
3. C8 г
4. D0,1 г

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

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