解答つき看護学校入学試験のための化学ワークシート

Apart from mercury, which element is a liquid at room temperature?

1. AChlorine
2. BIodine
3. CSodium
4. DBromine

What is absolute zero?

1. A−100 °C, the coldest temperature on Earth
2. B0 K, about −273 °C, the lowest possible temperature
3. C0 °C, the point at which pure water freezes into ice
4. D0 °F, the temperature of a salt and ice mixture

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

1. ADensity and mass
2. BVolume and temperature
3. CPressure and number of moles
4. DPressure and volume

How much heat is needed to raise the temperature of 100 g of water by 10 °C (specific heat of water = 4.18 J/g·°C)?

1. A4180 J
2. B41.8 J
3. C418 J
4. D41,800 J

At 20 °C, about 36 g of NaCl dissolves in 100 g of water. If 50 g of NaCl is stirred into 100 g of water at 20 °C, what happens?

1. AAll 50 g dissolves
2. BNone of the salt dissolves
3. CAbout 14 g dissolves and about 36 g stays undissolved
4. DAbout 36 g dissolves and about 14 g stays undissolved

温度一定で、気体の体積を半分にした。圧力はどうなるか。

1. A4 分の 1 になる
2. B変わらない
3. C半分になる
4. D2 倍になる

Pepsin digests protein in the stomach at about pH 2, but it stops working once food moves into the small intestine, where the pH is higher. Why?

1. AThe small intestine is too cold for any enzyme
2. BPepsin only works on fats in the small intestine
3. CPepsin is used up completely in the stomach, just like a reactant
4. DThe change in pH alters the shape of pepsin's active site

An isotope has a half-life of 8 days. How long does it take for 100 g to decay to 12.5 g?

1. A24 days
2. B64 days
3. C16 days
4. D32 days