Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

What is a molecule?

1. AA mixture of two different elements
2. BA single atom with a positive charge
3. CThe nucleus of an atom
4. DTwo or more atoms held together by covalent bonds

What does the rate of a reaction measure?

1. AHow hot the reaction gets
2. BHow much product forms in total by the end
3. CHow much energy the final products contain
4. DHow quickly reactants are used up or products are formed

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

1. ACrystal
2. BSolid
3. CLiquid
4. DGas

Bir magnezyum atomu iki elektron kaybediyor. Oluşan iyon nedir?

1. AMg⁻
2. BMg⁺
3. CMg²⁻
4. DMg²⁺

A reaction has ΔH = −890 kJ/mol. What does the negative sign tell you?

1. AThe reaction is at equilibrium
2. BThe reaction needs a catalyst
3. CThe reaction is endothermic
4. DThe reaction is exothermic

During digestion, large molecules are broken down by adding water across their bonds. What is this reaction called?

1. ACombustion
2. BPolymerisation
3. CCondensation
4. DHydrolysis

A salt is dissolved in water in an insulated cup, and the water temperature falls from 25 °C to 20 °C. Which statement is correct?

1. ADissolving is endothermic; the water took heat from the salt
2. BNo energy change occurred, because the temperature fell
3. CDissolving is endothermic; the dissolving salt took heat from the water
4. DDissolving is exothermic; the dissolving salt released heat into the water

100 mL of 1 M NaCl is mixed with 100 mL of 3 M NaCl. What is the concentration of the mixture?

1. A3 M
2. B1,5 M
3. C4 M
4. D2 M