Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

What is activation energy?

1. AThe energy stored in the products
2. BThe minimum energy reacting particles need for a reaction to happen
3. CThe energy needed to melt a solid
4. DThe total energy released once the reaction has finished

What is plasma, as a state of matter?

1. AThe liquid part of blood
2. BA liquid that has been cooled below its freezing point
3. CA very hot gas in which atoms have lost electrons and become ions
4. DA solid that conducts electricity

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

What is the molar mass of calcium carbonate, CaCO₃ (Ca = 40, C = 12, O = 16 g/mol)?

1. A116 g/mol
2. B84 g/mol
3. C68 g/mol
4. D100 g/mol

Which of these is a colloid?

1. ASalt water
2. BSand in water
3. CPure water
4. DMilk

How does a catalyst speed up a reaction?

1. AIt makes the reaction more exothermic
2. BIt raises the temperature of the reactants so they move faster
3. CIt adds extra reactant to the mixture
4. DIt provides a different pathway with a lower activation energy

A reaction at equilibrium has a very large equilibrium constant (K much greater than 1). What does this tell you?

1. AThe reaction cannot reach equilibrium
2. BThe reaction is very fast
3. CAt equilibrium, the mixture contains mostly products
4. DAt equilibrium, the mixture contains mostly reactants

Bir metal bir asitle tepkimeye giriyor ve çıtırtılı bir sesle yanan bir gaz çıkıyor. Bu hangi gazdır?

1. AKarbondioksit
2. BAzot
3. CHidrojen
4. DOksijen