ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

Which method separates two liquids with different boiling points, such as alcohol and water?

1. ADistillation
2. BSieving
3. CUsing a magnet
4. DFiltration

Where are the transition metals located on the periodic table?

1. AIn the central block, groups 3 to 12
2. BIn group 18 on the far right
3. CIn group 1 on the far left
4. DAbove the noble gases

What does the rule "like dissolves like" mean?

1. ASolids dissolve only in other solids
2. BPolar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar ones
3. COnly substances with identical formulas can ever dissolve in each other
4. DEvery substance dissolves in water

What is a polymer?

1. AA mixture of several different elements
2. BA small molecule containing only two atoms of one element
3. CA large molecule built from many repeating smaller units called monomers
4. DAn ion with more than one charge

สารใดถูกออกซิไดซ์ในปฏิกิริยา 2Mg + O₂ → 2MgO

1. Aแมกนีเซียม เพราะรับอิเล็กตรอน
2. Bออกซิเจน เพราะสูญเสียอิเล็กตรอน
3. Cแมกนีเซียม เพราะสูญเสียอิเล็กตรอน
4. Dไม่มีสารใดเปลี่ยนประจุ

Why does oxygen move from the alveoli of the lungs into the blood?

1. AThe partial pressure of oxygen is higher in the alveoli than in the blood
2. BThe partial pressure of oxygen is higher in the blood than in the alveoli
3. COxygen is pumped actively into the blood
4. DOxygen is heavier than carbon dioxide

จงดุลสมการ __C₃H₈ + __O₂ → __CO₂ + __H₂O สัมประสิทธิ์ของ O₂ คือเท่าใด

1. A3
2. B5
3. C10
4. D4

What is the formula of calcium phosphate, made from Ca²⁺ and PO₄³⁻ ions?

1. ACa₃PO₄
2. BCaPO₄
3. CCa₂(PO₄)₃
4. DCa₃(PO₄)₂