Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

What does the law of conservation of mass state?

1. AMass is lost as heat in every reaction
2. BGases have no mass
3. CThe mass of products is always greater than the mass of reactants
4. DMass is neither created nor destroyed in a chemical reaction

Which method separates sand from water?

1. AFiltration
2. BDistillation
3. CEvaporation of the sand
4. DChromatography

Which state of matter has a fixed volume but takes the shape of its container?

1. APlasma
2. BLiquid
3. CGas
4. DSolid

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

1. AMass number falls by 4 and atomic number falls by 2
2. BMass number falls by 2 and atomic number falls by 4
3. CNeither changes
4. DMass number stays the same and atomic number rises by 1

How does an antacid tablet relieve heartburn caused by excess stomach acid?

1. AA weak base in it neutralises some of the acid
2. BIt coats the stomach and stops all acid production
3. CIt turns the acid into a gas that is absorbed
4. DAn acid in it lowers the stomach pH further

How does atomic radius change going down a group?

1. AIt decreases, then increases
2. BIt decreases
3. CIt stays the same
4. DIt increases

Frying an egg turns the clear egg white solid and white. What happens to the proteins?

1. AThey are hydrolysed, so the peptide bonds break into separate amino acids
2. BThey are denatured: their shape changes, but the peptide bonds stay intact
3. CThey are converted into fats
4. DThey are burned to carbon dioxide and water

2H₂ + O₂ → 2H₂O tepkimesinde 4 g hidrojen (mol kütlesi 2 g/mol) bol oksijenle tepkimeye giriyor. Kaç gram su oluşur (mol kütlesi 18 g/mol)?

1. A72 g
2. B18 g
3. C36 g
4. D4 g