Робочий аркуш «Хімія для вступних іспитів на медсестринство» з відповідями

How many electrons are shared in a double covalent bond?

1. A8
2. B4
3. C6
4. D2

Which method separates sand from water?

1. AFiltration
2. BDistillation
3. CChromatography
4. DEvaporation of the sand

According to the Arrhenius definition, what does a base produce in water?

1. AChloride ions (Cl⁻)
2. BCarbonate ions (CO₃²⁻)
3. CHydroxide ions (OH⁻)
4. DHydrogen ions (H⁺)

Яка формула алюміній оксиду, утвореного йонами Al³⁺ та O²⁻?

1. AAl₃O₂
2. BAl₂O₃
3. CAlO₃
4. DAlO

When a nucleus emits a beta particle, how do its mass number and atomic number change?

1. AMass number rises by 1 and atomic number stays the same
2. BMass number falls by 4 and atomic number falls by 2
3. CMass number stays the same and atomic number rises by 1
4. DBoth fall by 1

How should the volume of water in a graduated cylinder be read?

1. AAt any angle, from the middle of the cylinder
2. BFrom below, at the highest point the water touches the glass
3. CAt eye level, from the bottom of the curved surface (meniscus)
4. DFrom above the cylinder, at the top edge of the curved surface

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. C44 g
4. D22 g

Газ перебуває під тиском 1 atm у контейнері об'ємом 6 L. За тієї самої температури його стискають до 2 L. Який новий тиск?

1. A3 atm
2. B0,33 atm
3. C4 atm
4. D12 atm