ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

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

1. ADistillation
2. BUsing a magnet
3. CFiltration
4. DSieving

What does organic chemistry study?

1. ACompounds made of metals
2. BOnly the noble gases
3. COnly compounds found in plants
4. DCompounds based on carbon

ข้อใดต่อไปนี้เป็นการเปลี่ยนแปลงทางเคมี

1. Aน้ำแข็งละลาย
2. Bน้ำตาลละลายในชา
3. Cไม้ไหม้
4. Dแก้วแตก

Which equation shows a combustion reaction?

1. ACaCO₃ → CaO + CO₂
2. BNaOH + HCl → NaCl + H₂O
3. CC₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
4. DZn + CuSO₄ → ZnSO₄ + Cu

สัมประสิทธิ์ชุดใดดุล __N₂ + __H₂ → __NH₃

1. A1, 3, 2
2. B2, 3, 2
3. C1, 1, 1
4. D1, 3, 1

Why does keeping food in a refrigerator slow down spoilage?

1. ACold air contains no oxygen
2. BCold temperatures add preservatives to the food
3. CLower temperatures slow down chemical and microbial reactions
4. DLower temperatures raise the activation energy of every reaction

What is (8 × 10⁶) ÷ (2 × 10⁻²)?

1. A4 × 10⁻¹²
2. B4 × 10⁸
3. C4 × 10⁴
4. D16 × 10⁴

Which coefficients balance the equation for cellular respiration, __C₆H₁₂O₆ + __O₂ → __CO₂ + __H₂O?

1. A1, 6, 6, 12
2. B2, 6, 12, 6
3. C1, 6, 6, 6
4. D1, 3, 6, 6