Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

Which electrons take part in chemical bonding?

1. AThe valence (outermost) electrons
2. BThe electrons closest to the nucleus
3. COnly the electrons in the first shell
4. DAll electrons take part equally

Boyle's law describes the relationship between which two properties of a gas, at constant temperature?

1. APressure and volume
2. BMass and volume
3. CPressure and temperature
4. DVolume and temperature

Which mixture is a suspension?

1. ASalt dissolved in water
2. BSand stirred into water
3. CSugar dissolved in water
4. DOxygen dissolved in water

Which of these is a colloid?

1. AMilk
2. BSalt water
3. CPure water
4. DSand in water

A reaction is at equilibrium. More of one reactant is added. According to Le Chatelier's principle, what happens?

1. ANothing changes
2. BThe equilibrium shifts toward the reactants
3. CThe reaction stops completely
4. DThe equilibrium shifts toward the products

Which statement describes a saturated fat?

1. AIt contains no carbon atoms
2. BIt is always liquid at room temperature
3. CIts fatty acid chains have no carbon–carbon double bonds
4. DIts fatty acid chains have many carbon–carbon double bonds

Sugar is heated in a pan. Which observation shows that a chemical change, not just a physical change, has happened?

1. AThe crystals become smaller when crushed
2. BIt gets hot to the touch
3. CIt turns black and gives off water vapour, leaving a solid that is no longer sweet
4. DIt melts into a clear, runny liquid that sets again when it cools

Yağ neden suda çözünmez?

1. AYağ apolar, su kutupludur ve "benzer benzeri çözer"
2. BYağ molekülleri yüklü iyonlardır
3. CYağ suyla tepkimeye girerek bir katı oluşturur
4. DSu, hiçbir şeyle karışamayacak kadar yoğundur