Užduočių lapas tema Chemija slaugos stojamiesiems egzaminams su atsakymais

Which acid is found in the stomach?

1. ASulfuric acid
2. BHydrochloric acid
3. CAcetic acid
4. DNitric acid

What is an unsaturated solution?

1. AA solution with undissolved solid at the bottom
2. BA solution that holds the maximum possible solute
3. CA solution that can still dissolve more solute
4. DA solution with no solute at all

Which process is exothermic (releases heat)?

1. AEvaporating water
2. BPhotosynthesis
3. CBurning methane gas
4. DMelting a block of ice

Rubbing alcohol evaporates faster than water at room temperature. What does this suggest?

1. AIt has a higher boiling point than water
2. BIts intermolecular forces are stronger than water's
3. CIts molecules are heavier than water molecules
4. DIts intermolecular forces are weaker than water's

What is carbon-14 dating used for?

1. AEstimating the age of material that was once alive
2. BDetecting carbon monoxide in a room
3. CMeasuring body temperature
4. DFinding the exact age of rocks that are billions of years old

What is the molar mass of calcium carbonate, CaCO₃ (Ca = 40, C = 12, O = 16 g/mol)?

1. A84 g/mol
2. B100 g/mol
3. C116 g/mol
4. D68 g/mol

Kuri iš šių reakcijų yra neutralizacijos reakcija?

1. AH₂SO₄ + 2KOH → K₂SO₄ + 2H₂O
2. BCH₄ + 2O₂ → CO₂ + 2H₂O
3. C2H₂O → 2H₂ + O₂
4. DZn + CuSO₄ → ZnSO₄ + Cu

A compound is 40% carbon, 6,7% hydrogen and 53,3% oxygen by mass (C = 12, H = 1, O = 16). What is its empirical formula?

1. ACH₄O
2. BCH₂O
3. CC₂HO
4. DCHO