解答つき看護学校入学試験のための化学ワークシート

Which is a sign that a chemical reaction may have taken place?

1. AWater freezes into ice when put in a freezer
2. BA block of wax melts when it is heated
3. CA gas is produced when two liquids are mixed
4. DSugar dissolves completely when stirred into water

触媒は何をするか。

1. A自身は消費されずに反応を速める
2. B反応を遅くし、消費される
3. C反応の反応物を供給する
4. D反応の生成物を変える

What are the units of molarity?

1. AMoles of solute per kilogram of the solvent used
2. BGrams of solute per litre of solution (g/L)
3. CMoles of solute per litre of solution (mol/L)
4. DGrams of solute per 100 g of solution

When the diaphragm contracts and the chest cavity gets bigger, what happens to the air pressure inside the lungs?

1. AIt falls, so air flows in
2. BIt rises, so air flows in
3. CIt does not change
4. DIt falls, so air flows out

To which family of organic compounds does ethanol, C₂H₅OH, belong?

1. AAlcohols
2. BEsters
3. CAlkanes
4. DCarboxylic acids

In the ideal gas law, PV = nRT, what does n stand for?

1. AThe number of atoms per molecule
2. BThe density of the gas
3. CThe number of molecules of gas
4. DThe number of moles of gas

Why does food cook faster in a pressure cooker?

1. ASteam is trapped, so the water boils at a lower temperature
2. BThe higher pressure lowers the boiling point
3. CThe higher pressure raises the boiling point, so the water is hotter
4. DPressure itself breaks down the food, regardless of temperature

砂糖が水に溶けることが化学変化ではないのはなぜか。

1. A砂糖が溶けるときは、常に熱が放出されるから
2. B砂糖が壊れて水に置き換わるから
3. C砂糖が水と反応して新しい化合物ができるから
4. D砂糖の分子は砂糖のままで、取り戻せるから