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

В атоме 6 протонов, 6 нейтронов и 6 электронов. Каково его массовое число?

1. A6
2. B0
3. C18
4. D12

Where are the metalloids found on the periodic table?

1. AIn the two separate rows at the bottom of the table
2. BIn group 18, at the far right edge of the table
3. CAlong the staircase line between the metals and the nonmetals
4. DIn group 1, at the far left edge of the table

Where are the transition metals located on the periodic table?

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

An exothermic reaction is at equilibrium. What happens if the temperature is raised?

1. AThe equilibrium does not change
2. BThe reaction becomes endothermic
3. CThe equilibrium shifts toward the products, raising the yield
4. DThe equilibrium shifts toward the reactants

A solution has a pH of 2. What is its hydrogen ion concentration?

1. A1 × 10⁻¹² mol/L
2. B2 mol/L
3. C1 × 10⁻² mol/L
4. D1 × 10² mol/L

Which type of bond holds the two atoms together in a nitrogen molecule, N₂?

1. AA single covalent bond
2. BA double covalent bond
3. CA triple covalent bond
4. DAn ionic bond

Уравняйте __Fe + __O₂ → __Fe₂O₃ наименьшими целыми числами. Каковы коэффициенты?

1. A2, 1, 1
2. B4, 3, 4
3. C2, 3, 1
4. D4, 3, 2

A piece of copper is placed in zinc sulfate solution. Zinc is more reactive than copper. What happens?

1. ANo reaction occurs
2. BZinc metal coats the copper and the solution turns blue
3. CHydrogen gas is produced
4. DCopper replaces zinc, forming copper sulfate