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. A18
2. B0
3. C12
4. D6

What causes the pressure of a gas in a container?

1. AGas particles sticking to the walls
2. BGas particles stopping and pushing outward
3. CGas particles colliding with the container walls
4. DThe weight of the container pressing on the gas inside

What is an alpha particle made of?

1. A1 proton and 1 electron
2. B2 protons and 2 neutrons
3. CA single high-energy electron
4. DPure electromagnetic energy

Why does ice float on liquid water?

1. AIce is less dense than liquid water
2. BIce has a higher mass than the same volume of water
3. CIce contains trapped air from the freezer
4. DIce is denser than liquid water

Which halogen is the most reactive?

1. AChlorine
2. BIodine
3. CBromine
4. DFluorine

Water has a high specific heat capacity. How does this help the human body?

1. AIt makes water a poor solvent for salts
2. BIt helps keep body temperature stable
3. CIt makes the blood more acidic
4. DIt allows oxygen to dissolve in water more easily

What is the net ionic equation for the neutralisation of any strong acid by any strong base?

1. AH⁺ + OH⁻ → H₂O
2. BH₂ + O₂ → H₂O₂
3. CH⁺ + Cl⁻ → HCl
4. DNa⁺ + Cl⁻ → NaCl

Alkanes follow the general formula CₙH₂ₙ₊₂. What is the formula of the alkane with 4 carbon atoms?

1. AC₄H₆
2. BC₄H₁₀
3. CC₄H₈
4. DC₄H₁₂