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

Chất nào là một base?

1. ANước chanh (citric acid)
2. BGiấm (acetic acid)
3. CSodium hydroxide (NaOH)
4. DHydrochloric acid (HCl)

What is the change from a gas to a liquid called?

1. ASublimation
2. BEvaporation
3. CCondensation
4. DFreezing

Which positive ion is found in the highest concentration inside most body cells?

1. ASodium (Na⁺)
2. BCalcium (Ca²⁺)
3. CMagnesium (Mg²⁺)
4. DPotassium (K⁺)

Which bond joins amino acids together in a protein?

1. AA peptide bond
2. BA hydrogen bond
3. CAn ionic bond
4. DA glycosidic bond

Which halogen is the most reactive?

1. AChlorine
2. BBromine
3. CIodine
4. DFluorine

Zn + 2HCl → ZnCl₂ + H₂ là loại phản ứng nào?

1. APhản ứng thế đơn
2. BPhản ứng hóa hợp
3. CPhản ứng trao đổi kép
4. DPhản ứng phân hủy

Cells oxidise glucose to CO₂ and water, as burning glucose does. How does cellular respiration differ from burning?

1. AIt does not need oxygen at any stage
2. BIt releases the energy in many small, enzyme-controlled steps
3. CIt releases much more total energy than burning the same glucose
4. DIt produces different products from burning

Ethanol (CH₃CH₂OH) and dimethyl ether (CH₃OCH₃) have the same formula, C₂H₆O, but ethanol boils at a much higher temperature. Why?

1. ADimethyl ether is ionic and ethanol is covalent
2. BEthanol has an O–H group, so its molecules form hydrogen bonds with each other
3. CEthanol has more carbon atoms
4. DEthanol molecules are heavier than dimethyl ether molecules