Робочий аркуш «Хімія для вступних іспитів на медсестринство» з відповідями

What is an acid–base indicator?

1. AA substance that changes colour depending on pH
2. BA gas given off by acids
3. CA device that measures temperature
4. DA substance that neutralises every acid

Що з наведеного є фізичною зміною?

1. AСкисання молока
2. BПідсмажування хліба до рум'яності
3. CІржавіння заліза
4. DКипіння води з утворенням пари

What are the building blocks of carbohydrates such as starch?

1. AFatty acids joined to a glycerol molecule
2. BAmino acids
3. CNucleotides
4. DMonosaccharides (simple sugars) such as glucose

Uranium-235 and uranium-238 both have 92 protons. How many more neutrons does an atom of uranium-238 have?

1. A0
2. B92
3. C146
4. D3

What is the normal boiling point of a liquid?

1. AThe temperature at which its particles stop moving
2. BThe temperature at which its vapour pressure equals 1 atmosphere
3. CThe temperature at which its density is greatest
4. DThe temperature at which it first starts to evaporate

Water can act as an acid in some reactions and as a base in others. What is such a substance called?

1. ASaturated
2. BNeutral
3. CIsotonic
4. DAmphoteric

A reaction should produce 2 mol of a product with a molar mass of 30 g/mol, but only 48 g is collected. What is the percent yield?

1. A80%
2. B60%
3. C48%
4. D125%

What is the formula of iron(III) chloride?

1. AFe₂Cl₃
2. BFeCl₂
3. CFeCl₃
4. DFe₃Cl