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

Which functional group is found in all alcohols?

1. AHydroxyl group (–OH)
2. BCarboxyl group (–COOH)
3. CCarbonyl group (C=O) only
4. DAmino group (–NH₂)

Какой тип связи удерживает вместе хлорид натрия (поваренную соль)?

1. AИонная связь
2. BВодородная связь
3. CМеталлическая связь
4. DКовалентная связь

DNA belongs to which group of biological molecules?

1. AProteins
2. BNucleic acids
3. CCarbohydrates
4. DLipids

Nitrogen is in group 15 of the periodic table. How many valence electrons does a nitrogen atom have?

1. A3
2. B7
3. C15
4. D5

What are isomers?

1. ACompounds with the same structure but different molecular formulas
2. BMolecules that contain the same number of bonds
3. CCompounds with the same molecular formula but different structures
4. DAtoms of the same element with different numbers of neutrons

A bag of 5% (w/v) glucose solution (called 5% dextrose in the US) contains 5 g of glucose per 100 mL. How many grams of glucose are in 1 L?

1. A500 g
2. B5 g
3. C0,5 g
4. D50 g

In the reaction 2Na + Cl₂ → 2NaCl, which substance is the oxidising agent?

1. ANa⁺
2. BNa
3. CNaCl
4. DCl₂

Methane burns as CH₄ + 2O₂ → CO₂ + 2H₂O. What mass of CO₂ (44 g/mol) forms from 16 g of CH₄ (16 g/mol)?

1. A88 g
2. B16 g
3. C22 g
4. D44 g