Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

What is a cation?

1. AA molecule with no charge
2. BA positively charged ion
3. CA neutral atom
4. DA negatively charged ion

What do the letters STP stand for in gas chemistry?

1. ASpecific temperature and particles
2. BStandard temperature and pressure
3. CStable temperature point
4. DStandard time and pressure

Which state of matter has neither a fixed shape nor a fixed volume?

1. ASolid
2. BGas
3. CLiquid
4. DCrystal

Daha yüksek sıcaklık, bir katının suda ne kadar çözüneceğini genellikle nasıl etkiler?

1. ADaha fazla katı çözünür
2. BKatı gaza dönüşür
3. CDaha az katı çözünür
4. DKatılar üzerinde etkisi yoktur

For the gas reaction N₂ + 3H₂ ⇌ 2NH₃, what is the effect of increasing the pressure?

1. AThe NH₃ breaks down completely
2. BThe equilibrium shifts to the right, toward NH₃
3. CThe equilibrium shifts to the left, toward N₂ and H₂
4. DThere is no effect on the equilibrium

Uranium-235 and uranium-238 both have 92 protons. How many more neutrons does an atom of uranium-238 have?

1. A3
2. B0
3. C146
4. D92

How much water must be added to 50 mL of a 10% solution to make a 2% solution?

1. A250 mL
2. B40 mL
3. C200 mL
4. D100 mL

Raising the temperature by 10 °C can roughly double the rate of many reactions. What is the main reason?

1. AThe reaction becomes more exothermic
2. BMany more collisions have at least the activation energy
3. CThe particles become larger and easier to hit
4. DThe activation energy itself is lowered by the extra heat