Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

What colour does blue litmus paper turn in an acid?

1. AGreen
2. BPurple
3. CRed
4. DBlue (no change)

Which gas is needed for a fuel to burn (combustion)?

1. AHelium
2. BNitrogen
3. CCarbon dioxide
4. DOxygen

What does the rule "like dissolves like" mean?

1. APolar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar ones
2. BEvery substance dissolves in water
3. CSolids dissolve only in other solids
4. DOnly substances with identical formulas can ever dissolve in each other

How does evaporation differ from boiling?

1. AEvaporation happens only at the surface and at any temperature; boiling happens throughout the liquid at a set temperature
2. BEvaporation needs a higher temperature than boiling
3. CEvaporation happens throughout the liquid at a set temperature; boiling happens only at the surface
4. DEvaporation produces a solid, while boiling produces a gas

A reaction is at equilibrium. More of one reactant is added. According to Le Chatelier's principle, what happens?

1. AThe equilibrium shifts toward the reactants
2. BThe reaction stops completely
3. CThe equilibrium shifts toward the products
4. DNothing changes

Which of these is a colloid?

1. APure water
2. BMilk
3. CSalt water
4. DSand in water

Each C=O bond in carbon dioxide is polar, yet the CO₂ molecule is nonpolar. Why?

1. ACarbon and oxygen have the same electronegativity
2. BThe molecule is linear, so the two bond dipoles cancel out
3. CCarbon has lone pairs that cancel the dipoles
4. DThe bonds are ionic, not covalent

Eşit hacimlerde 1 M HCl ve 1 M NaOH karıştırılıyor. Sonucun yaklaşık pH değeri nedir?

1. A3,5
2. B7
3. C14
4. D1