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

What is a beta particle?

1. AA helium nucleus with two protons and two neutrons
2. BA neutron that leaves the nucleus
3. CA wave of visible light
4. DA high-energy electron released from a nucleus

In a solution, what is the solvent?

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

What is the SI base unit of mass?

1. APound
2. BGram
3. CNewton
4. DKilogram

Which nuclear process powers the Sun?

1. AFission of uranium into smaller nuclei
2. BFusion of hydrogen nuclei to form helium
3. CAlpha decay of helium
4. DCombustion of hydrogen gas with oxygen in its core

What is the molar mass of sulfuric acid, H₂SO₄ (H = 1, S = 32, O = 16 g/mol)?

1. A98 g/mol
2. B50 g/mol
3. C96 g/mol
4. D49 g/mol

Какова формула оксида алюминия, состоящего из ионов Al³⁺ и O²⁻?

1. AAl₂O₃
2. BAl₃O₂
3. CAlO₃
4. DAlO

Which of these is a redox reaction?

1. ACaCO₃ → CaO + CO₂
2. BAgNO₃ + NaCl → AgCl + NaNO₃
3. CZn + CuSO₄ → ZnSO₄ + Cu
4. DNaOH + HCl → NaCl + H₂O

An element in period 3 forms an oxide with the formula X₂O₃. Which element is X?

1. APhosphorus
2. BMagnesium
3. CSodium
4. DAluminium