1.Dễ
Which quantity is the same for 1 mole of any substance?
- AThe volume as a liquid
- BThe number of particles
- CThe mass in grams
- DThe number of atoms per molecule
Phiếu bài tập Hóa học cho kỳ thi đầu vào điều dưỡng có đáp án
2.Dễ
What is the formula of methane, the main gas in natural gas?
- ACH₂
- BCO₂
- CC₂H₆
- DCH₄
3.Dễ
What does the rate of a reaction measure?
- AHow hot the reaction gets
- BHow much energy the final products contain
- CHow quickly reactants are used up or products are formed
- DHow much product forms in total by the end
4.Trung bình
What is the formula of the hydroxide ion?
- AOH⁺
- BH₃O⁺
- COH⁻
- DO²⁻
5.Trung bình
Water climbs up a narrow glass tube. Which property mainly causes this?
- AAdhesion of water to the glass
- BLow density of water
- CEvaporation of water from the tube
- DWater's high boiling point
6.Trung bình
Which element has the most metallic character?
- AAluminium (Al)
- BSodium (Na)
- CCaesium (Cs)
- DChlorine (Cl)
7.Khó
How many atoms in total are in 0,5 mol of water, H₂O?
- A1,81 × 10²⁴
- B6,02 × 10²³
- C3,01 × 10²³
- D9,03 × 10²³
8.Khó
A sealed bag of crisps (potato chips) packed at sea level looks puffed up when it is carried to a high mountain. Why?
- AThe outside air pressure is lower, so the gas inside expands
- BThe gas inside the bag is heated strongly by the mountain sunlight
- CThe bag becomes thinner and weaker at altitude
- DMore gas is produced by the crisps at altitude
Đáp án
- 1. B · The number of particles
- 2. D · CH₄
- 3. C · How quickly reactants are used up or products are formed
- 4. C · OH⁻
- 5. A · Adhesion of water to the glass
- 6. C · Caesium (Cs)
- 7. D · 9,03 × 10²³
- 8. A · The outside air pressure is lower, so the gas inside expands
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