ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What is the formula of sulfuric acid?

1. AHCl
2. BH₂SO₃
3. CHNO₃
4. DH₂SO₄

What does organic chemistry study?

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

A cleaning solution has a pH of 12. How is it described?

1. AStrongly acidic
2. BStrongly basic
3. CWeakly acidic
4. DNeutral

What feature makes a hydrocarbon an alkene?

1. AAn –OH group
2. BOnly carbon–carbon single bonds
3. CA ring of six carbon atoms with no hydrogen
4. DAt least one carbon–carbon double bond

Zn + 2HCl → ZnCl₂ + H₂ เป็นปฏิกิริยาชนิดใด

1. Aการแทนที่คู่
2. Bการสังเคราะห์
3. Cการสลายตัว
4. Dการแทนที่เดี่ยว

A bag of 5% (w/v) glucose solution (called 5% dextrose in the US) contains 5 g of glucose per 100 mL. How many grams of glucose are in 1 L?

1. A5 g
2. B50 g
3. C0.5 g
4. D500 g

Marble chips react with hydrochloric acid, giving off CO₂. The gas is produced quickly at first, then more and more slowly. Why does the rate fall?

1. AThe products act as a catalyst that slows the reaction down
2. BThe CO₂ produced turns back into acid
3. CThe activation energy steadily increases as the reaction goes on
4. DThe acid concentration falls as it is used up, so collisions become less frequent

Methane burns as CH₄ + 2O₂ → CO₂ + 2H₂O. What mass of CO₂ (44 g/mol) forms from 16 g of CH₄ (16 g/mol)?

1. A16 g
2. B88 g
3. C44 g
4. D22 g