Užduočių lapas tema Chemija slaugos stojamiesiems egzaminams su atsakymais

Kuris iš šių pokyčių yra fizikinis?

1. ADuonos paskrudinimas iki rusvos spalvos
2. BPieno surūgimas
3. CVandens virimas į garus
4. DGeležies rūdijimas

According to the kinetic molecular theory, how do gas particles move?

1. AConstantly, randomly and in straight lines between collisions
2. BAlways in a single direction, set by the pull of gravity
3. CSlowly in fixed positions
4. DOnly when heated, and then in neat lines between the walls

What is a dilute solution?

1. AOne with a small amount of solute in a lot of solvent
2. BOne with no solvent at all
3. COne with a large amount of solute in a little solvent
4. DOne in which the solute has reacted with the solvent

When diluting a concentrated acid, which method is safe?

1. AAdd the water quickly to the acid
2. BMix them in any order, as long as it is fast
3. CAdd the water slowly to the acid
4. DAdd the acid slowly to the water

How many grams are in 2,5 kg?

1. A2500 g
2. B250 g
3. C25 g
4. D0,0025 g

Which bond joins amino acids together in a protein?

1. AAn ionic bond
2. BA glycosidic bond
3. CA hydrogen bond
4. DA peptide bond

When water boils, what is overcome?

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

Magnesium burns as 2Mg + O₂ → 2MgO. What mass of MgO (40 g/mol) forms from 48 g of Mg (24 g/mol)?

1. A80 g
2. B48 g
3. C40 g
4. D160 g