ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

เมื่อกรดและเบสทำปฏิกิริยาสะเทินกัน จะได้อะไร

1. Aเกลือและน้ำ
2. Bโลหะและแก๊สไฮโดรเจน
3. Cคาร์บอนไดออกไซด์เพียงอย่างเดียว
4. Dกรดที่แรงกว่า

What is the molar mass of oxygen gas, O₂ (O = 16 g/mol)?

1. A32 g/mol
2. B48 g/mol
3. C8 g/mol
4. D16 g/mol

Apart from mercury, which element is a liquid at room temperature?

1. ASodium
2. BChlorine
3. CIodine
4. DBromine

A reaction is at equilibrium. More of one reactant is added. According to Le Chatelier's principle, what happens?

1. AThe equilibrium shifts toward the reactants
2. BNothing changes
3. CThe equilibrium shifts toward the products
4. DThe reaction stops completely

In 2KClO₃ → 2KCl + 3O₂, how many moles of O₂ form from 4 mol of KClO₃?

1. A6 mol
2. B8 mol
3. C4 mol
4. D3 mol

Which property stays the same whether you have a small sample or a large sample of a pure substance?

1. ADensity
2. BMass
3. CVolume
4. DTotal heat content

At room temperature chlorine (Cl₂) is a gas, bromine (Br₂) is a liquid and iodine (I₂) is a solid. What best explains this trend?

1. AIodine forms hydrogen bonds but chlorine does not
2. BLarger molecules with more electrons have stronger dispersion forces
3. CChlorine is ionic, while iodine is metallic
4. DThe covalent bond in I₂ is much stronger than in Cl₂

What is the formula of iron(III) chloride?

1. AFe₂Cl₃
2. BFe₃Cl
3. CFeCl₂
4. DFeCl₃