ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

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

1. AStrongly basic
2. BNeutral
3. CWeakly acidic
4. DStrongly acidic

สูตรเคมีของน้ำคืออะไร

1. AH₂O₂
2. BOH
3. CH₂O
4. DHO₂

Which unit is commonly used for the density of a liquid?

1. Ag·mL
2. Bkg
3. CmL/g
4. Dg/mL

Sulfur has 16 electrons. In which period of the periodic table is it?

1. APeriod 6
2. BPeriod 16
3. CPeriod 2
4. DPeriod 3

Why does stirring help a solid dissolve faster?

1. AIt raises the temperature of the solvent by friction a great deal
2. BIt increases the amount of solute that can dissolve in total
3. CIt brings fresh solvent into contact with the solid's surface
4. DIt turns the solid into a liquid

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

Which list puts fluorine, chlorine and bromine in order of increasing electronegativity?

1. ABr < F < Cl
2. BCl < Br < F
3. CF < Cl < Br
4. DBr < Cl < F

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

1. ACa₃(PO₄)₂
2. BCa₃PO₄
3. CCaPO₄
4. DCa₂(PO₄)₃