Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

What is the melting point of a substance?

1. AThe temperature at which it dissolves in water
2. BThe temperature at which its liquid turns into a gas
3. CThe temperature at which it catches fire
4. DThe temperature at which its solid turns into a liquid

Nötr bir atomun 11 protonu var. Kaç elektronu vardır?

1. A11
2. B12
3. C10
4. D22

Dünya'nın havasının çoğunu hangi gaz oluşturur?

1. AOksijen
2. BAzot
3. CHidrojen
4. DKarbondioksit

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

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

0,5 mol of KCl is dissolved to make 250 mL of solution. What is its molarity?

1. A0,125 M
2. B2 M
3. C125 M
4. D0,5 M

Which assumption is made about an ideal gas?

1. AIts particles have no attraction to each other
2. BIts particles stay still at room temperature
3. CIts particles lose energy in every collision
4. DIts particles are large, closely packed and strongly attracted

Samples of hydrogen gas (H₂) and oxygen gas (O₂) are at the same temperature. Which statement is correct?

1. AThey have the same average kinetic energy, but H₂ molecules move faster
2. BO₂ molecules move faster because they are heavier
3. CBoth move at the same average speed
4. DH₂ molecules have more kinetic energy and move faster

A catalyst is added to an exothermic reaction. How does the energy diagram change?

1. AThe peak is lower, but the energy of reactants and products stays the same
2. BThe reaction becomes endothermic
3. CThe products end up at a lower energy, so more heat is released
4. DThe reactants start at a higher energy