Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

DNA belongs to which group of biological molecules?

1. ACarbohydrates
2. BLipids
3. CProteins
4. DNucleic acids

Katıdan doğrudan gaza geçişe ne denir?

1. AYoğuşma
2. BSüblimleşme
3. CKırağılaşma (depozisyon)
4. DErime

What is the normal pH range of human arterial blood?

1. A7,35 to 7,45
2. B7,85 to 7,95
3. C7,00 to 7,10
4. D6,35 to 6,45

How does a mixture of iron filings and sulfur powder differ from the compound iron sulfide?

1. AThe mixture has a fixed ratio of iron to sulfur
2. BThe mixture is formed by a chemical reaction between the two elements
3. CThe mixture can be separated physically, for example with a magnet
4. DThe compound keeps the magnetic properties of iron

How many lone (non-bonding) pairs of electrons are on the oxygen atom in a water molecule?

1. A1
2. B4
3. C0
4. D2

A red blood cell is placed in a concentrated (hypertonic) salt solution. What happens?

1. AWater leaves the cell, which shrinks
2. BThe cell stays the same size and shape
3. CWater enters the cell, which swells and may burst
4. DSalt leaves the cell, which swells

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

1. A160 g
2. B48 g
3. C40 g
4. D80 g

Bir örnek 3,01 × 10²³ su molekülü içeriyor. Bu kaç moldür?

1. A2 mol
2. B0,5 mol
3. C1,81 mol
4. D3,01 mol