Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

What is the formula of methane, the main gas in natural gas?

1. ACH₂
2. BCO₂
3. CCH₄
4. DC₂H₆

Which two substances must be present for iron to rust?

1. ACarbon dioxide and salt
2. BHydrogen and oxygen gas only
3. COxygen and water
4. DNitrogen and water

Klor, brom ve iyot hangi grubun örnekleridir?

1. ASoy gazlar
2. BGeçiş metalleri
3. CAlkali metaller
4. DHalojenler

A red blood cell is placed in pure water (a hypotonic solution). What happens?

1. ASalt enters the cell, which shrinks
2. BWater leaves the cell, which shrinks and wrinkles
3. CNothing happens to the cell
4. DWater enters the cell, which swells and may burst

Nitric acid (HNO₃) reacts with potassium hydroxide (KOH). Which salt forms?

1. APotassium nitrate, KNO₃
2. BPotassium hydride, KH
3. CNitrogen hydroxide, NOH
4. DPotassium nitrite, KNO₂

2Mg + O₂ → 2MgO tepkimesinde hangi madde yükseltgenir?

1. AMagnezyum, çünkü elektron kazanır
2. BHiçbirinin yükü değişmez
3. CMagnezyum, çünkü elektron kaybeder
4. DOksijen, çünkü elektron kaybeder

Olive oil is liquid at room temperature, while butter is solid. Which explanation is correct?

1. AOlive oil molecules are ionic, while butter molecules are covalent
2. BOlive oil has more C=C double bonds, which kink the chains so they cannot pack closely
3. CButter contains more water, which freezes at room temperature
4. DOlive oil has no C=C double bonds, so its chains stay straight and pack tightly

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. AC₂HO
2. BCHO
3. CCH₂O
4. DCH₄O