ورقة عمل الكيمياء لامتحانات القبول في التمريض مع الإجابات

محلول رقمه الهيدروجيني 3. كيف يوصف؟

1. Aقاعدي
2. Bمتعادل
3. Cحمضي
4. Dمشبع

What does the rule "like dissolves like" mean?

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

Which state of matter has neither a fixed shape nor a fixed volume?

1. AGas
2. BLiquid
3. CSolid
4. DCrystal

ما شحنة أيون الكلوريد؟

1. A+1
2. B−1
3. C−2
4. D+7

How many covalent bonds does a carbon atom usually form?

1. A2
2. B1
3. C3
4. D4

How does an antacid tablet relieve heartburn caused by excess stomach acid?

1. AAn acid in it lowers the stomach pH further
2. BA weak base in it neutralises some of the acid
3. CIt turns the acid into a gas that is absorbed
4. DIt coats the stomach and stops all acid production

Samples of hydrogen gas (H₂) and oxygen gas (O₂) are at the same temperature. Which statement is correct?

1. AThey have the same average kinetic energy, but H₂ molecules move faster
2. BO₂ molecules move faster because they are heavier
3. CH₂ molecules have more kinetic energy and move faster
4. DBoth move at the same average speed

A reaction at equilibrium has a very large equilibrium constant (K much greater than 1). What does this tell you?

1. AThe reaction cannot reach equilibrium
2. BAt equilibrium, the mixture contains mostly reactants
3. CAt equilibrium, the mixture contains mostly products
4. DThe reaction is very fast