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

What is the change from a gas directly to a solid, skipping the liquid state, called?

1. ASublimation
2. BCondensation
3. CFreezing
4. DDeposition

An instant cold pack feels cold when the substance inside dissolves. How is this dissolving process classified?

1. AA combustion reaction
2. BEndothermic
3. CA neutralisation reaction
4. DExothermic

Which unit is commonly used for the density of a liquid?

1. Ag·mL
2. Bg/mL
3. CmL/g
4. Dkg

Dung dịch đệm có tác dụng gì?

1. ABiến bất kỳ acid nào thành base mạnh
2. BGiữ nhiệt độ của dung dịch không đổi
3. CChống lại sự thay đổi pH khi thêm một ít acid hoặc base
4. DLàm các phản ứng trung hòa nhanh hơn để pH nhanh chóng đạt đúng 7

Which halogen is the most reactive?

1. ABromine
2. BIodine
3. CChlorine
4. DFluorine

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

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

Khối lượng mol của glucose, C₆H₁₂O₆, là bao nhiêu (C = 12, H = 1, O = 16 g/mol)?

1. A96 g/mol
2. B168 g/mol
3. C180 g/mol
4. D29 g/mol

Burning a match is strongly exothermic, so why does it not catch fire until it is struck?

1. AStriking pushes extra oxygen into the chemicals of the match head
2. BStriking supplies the activation energy to start the reaction
3. CStriking makes the reaction endothermic
4. DThe match must first absorb all its energy from the air