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

What is the formula of sulfuric acid?

1. AH₂SO₄
2. BH₂SO₃
3. CHNO₃
4. DHCl

In a solution, what is the solvent?

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

Каков pH чистой воды при 25 °C?

1. A0
2. B1
3. C7
4. D14

What does Avogadro's law state?

1. AThe pressure of a gas doubles when its temperature is halved
2. BEqual masses of all gases contain equal numbers of molecules under any conditions
3. CEqual volumes of gases at the same temperature and pressure contain equal numbers of molecules
4. DOne mole of any gas has a mass of 22,4 g

For the gas reaction N₂ + 3H₂ ⇌ 2NH₃, what is the effect of increasing the pressure?

1. AThe NH₃ breaks down completely
2. BThe equilibrium shifts to the right, toward NH₃
3. CThere is no effect on the equilibrium
4. DThe equilibrium shifts to the left, toward N₂ and H₂

Какие коэффициенты уравнивают уравнение __H₂ + __O₂ → __H₂O?

1. A2, 2, 2
2. B1, 1, 1
3. C2, 1, 2
4. D1, 2, 1

Which of these is a redox reaction?

1. ANaOH + HCl → NaCl + H₂O
2. BAgNO₃ + NaCl → AgCl + NaNO₃
3. CCaCO₃ → CaO + CO₂
4. DZn + CuSO₄ → ZnSO₄ + Cu

What is the oxidation number of manganese in potassium permanganate, KMnO₄?

1. A+4
2. B+1
3. C−1
4. D+7