Phiếu bài tập Hóa học cho kỳ thi đầu vào điều dưỡng có đáp án

What is an electrolyte?

1. AA substance that dissolves as whole molecules without forming any ions
2. BA gas that dissolves in blood
3. CA substance that forms ions and conducts electricity when dissolved in water
4. DA metal that conducts electricity as a solid

Which of these is a chemical property?

1. AColour
2. BBoiling point
3. CFlammability
4. DDensity

Sodium và potassium thuộc nhóm nào?

1. AHalogen (nhóm 17)
2. BKim loại kiềm (nhóm 1)
3. CKim loại kiềm thổ (nhóm 2)
4. DKhí hiếm (nhóm 18)

Why can a very high fever disrupt the body's chemical reactions?

1. AHigh temperatures make every enzyme work faster without any limit
2. BHigh temperatures turn enzymes into fats
3. CHigh temperatures can change the shape of enzymes so they stop working
4. DHigh temperatures remove the water from blood

How does ionisation energy (the energy needed to remove an outer electron) generally change from left to right across a period?

1. AIt stays the same
2. BIt increases
3. CIt first falls, then rises sharply
4. DIt decreases

Which assumption is made about an ideal gas?

1. AIts particles are large, closely packed and strongly attracted
2. BIts particles have no attraction to each other
3. CIts particles lose energy in every collision
4. DIts particles stay still at room temperature

Why does food cook faster in a pressure cooker?

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

Orange bromine water is shaken with two hydrocarbons. With hexene it turns colourless; with hexane it stays orange. What does this show?

1. ABoth contain double bonds, but hexane reacts more slowly
2. BHexene contains a C=C double bond; hexane does not
3. CHexane contains a C=C double bond; hexene does not
4. DHexene is an alcohol and hexane is an acid