Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

What does the double arrow (⇌) in a chemical equation show?

1. AThe reaction needs a catalyst
2. BThe reaction is very fast
3. CThe reaction releases heat
4. DThe reaction is reversible

What is an empirical formula?

1. AA drawing of how the atoms are bonded
2. BThe simplest whole-number ratio of atoms in a compound
3. CThe mass of one mole of a compound
4. DThe actual number of each atom in one molecule

A blown-up balloon is put in a freezer. What happens to its volume?

1. AThe balloon bursts
2. BIt stays exactly the same
3. CIt increases
4. DIt decreases

How many moles of gas are in 44,8 L at STP (0 °C and 1 atm)?

1. A2 mol
2. B22,4 mol
3. C0,5 mol
4. D44,8 mol

Which halogen is the most reactive?

1. AFluorine
2. BIodine
3. CBromine
4. DChlorine

How does evaporation differ from boiling?

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

2 M'lik 300 mL çözelti hazırlamak için 6 M'lik stok çözeltiden kaç mL gerekir?

1. A50 mL
2. B900 mL
3. C100 mL
4. D150 mL

Alpha radiation is stopped by skin, yet an alpha source is very dangerous if swallowed or inhaled. Why?

1. AInside the body, alpha particles deposit all their energy in nearby living cells
2. BAlpha particles turn into much more penetrating gamma rays once inside the body
3. CStomach acid makes the alpha source more radioactive
4. DAlpha particles are only produced at body temperature