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

What is oxidation, in terms of electrons?

1. AGain of neutrons
2. BGain of electrons
3. CLoss of protons
4. DLoss of electrons

Which of these is a heterogeneous mixture?

1. AOil and water
2. BAir
3. CSalt dissolved in water
4. DSugar dissolved in tea

What does the subscript 2 in H₂O tell you?

1. AWater has a charge of 2
2. BEach molecule contains two hydrogen atoms
3. CEach molecule contains two oxygen atoms
4. DThere are two water molecules

Water can act as an acid in some reactions and as a base in others. What is such a substance called?

1. ANeutral
2. BIsotonic
3. CSaturated
4. DAmphoteric

What is the molar mass of sodium chloride, NaCl (Na = 23, Cl = 35,5 g/mol)?

1. A58,5 g/mol
2. B23 g/mol
3. C12,5 g/mol
4. D81,5 g/mol

Phần trăm khối lượng muối trong dung dịch pha từ 15 g muối và 135 g nước là bao nhiêu?

1. A11%
2. B90%
3. C10%
4. D15%

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

1. A168 g/mol
2. B96 g/mol
3. C29 g/mol
4. D180 g/mol

Frying an egg turns the clear egg white solid and white. What happens to the proteins?

1. AThey are hydrolysed, so the peptide bonds break into separate amino acids
2. BThey are burned to carbon dioxide and water
3. CThey are converted into fats
4. DThey are denatured: their shape changes, but the peptide bonds stay intact