Užduočių lapas tema Chemija slaugos stojamiesiems egzaminams su atsakymais

What does organic chemistry study?

1. AOnly compounds found in plants
2. BCompounds made of metals
3. CCompounds based on carbon
4. DOnly the noble gases

What are the units of molarity?

1. AGrams of solute per 100 g of solution
2. BMoles of solute per litre of solution (mol/L)
3. CMoles of solute per kilogram of the solvent used
4. DGrams of solute per litre of solution (g/L)

Kurioje grupėje yra tauriosios dujos, pavyzdžiui, helis ir neonas?

1. A18 grupėje
2. B17 grupėje
3. C1 grupėje
4. D2 grupėje

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

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

Which equation shows a combustion reaction?

1. AC₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
2. BCaCO₃ → CaO + CO₂
3. CNaOH + HCl → NaCl + H₂O
4. DZn + CuSO₄ → ZnSO₄ + Cu

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 × 10² mol/L
4. D1 × 10⁻² mol/L

A gas occupies 4 L at 2 atm and 200 K. What is its volume at 1 atm and 400 K?

1. A1 L
2. B4 L
3. C16 L
4. D8 L

When water boils, what is overcome?

1. AThe ionic bonds between H⁺ and O²⁻
2. BThe covalent O–H bonds inside each molecule
3. CHydrogen bonds between water molecules
4. DThe forces holding the oxygen nucleus together