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

Hạt nào trong nguyên tử mang điện tích dương?

1. AElectron
2. BNeutron
3. CProton
4. DPhoton

Which gas is needed for a fuel to burn (combustion)?

1. AOxygen
2. BNitrogen
3. CHelium
4. DCarbon dioxide

What does the rate of a reaction measure?

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

Cấu hình electron của nguyên tử sodium (11 electron) là gì?

1. A2, 8, 2
2. B2, 8, 1
3. C2, 9
4. D8, 2, 1

What percentage of the mass of water (H₂O, 18 g/mol) is hydrogen (H = 1 g/mol)?

1. AAbout 89%
2. BAbout 67%
3. CAbout 5,6%
4. DAbout 11%

What is the normal boiling point of a liquid?

1. AThe temperature at which its density is greatest
2. BThe temperature at which its vapour pressure equals 1 atmosphere
3. CThe temperature at which its particles stop moving
4. DThe temperature at which it first starts to evaporate

Một ion có 12 proton và 10 electron. Đó là ion nào?

1. ANa⁺
2. BMg²⁺
3. CNe
4. DMg²⁻

A student tests whether water temperature affects how fast sugar dissolves. Which set of factors should be kept the same in every trial?

1. AThe mass of sugar, the type of sugar, the volume of water and the amount of stirring
2. BThe water temperature and the dissolving time
3. CNothing, because changing several factors at once gives more useful data
4. DOnly the colour of the cup