ورقة عمل الكيمياء لامتحانات القبول في التمريض مع الإجابات

ماذا ينتج عن تعادل حمض وقاعدة؟

1. Aثاني أكسيد الكربون فقط
2. Bحمض أقوى
3. Cفلز وغاز هيدروجين
4. Dملح وماء

What are the units of molarity?

1. AGrams of solute per litre of solution (g/L)
2. BMoles of solute per litre of solution (mol/L)
3. CMoles of solute per kilogram of the solvent used
4. DGrams of solute per 100 g of solution

What are the usual units of molar mass?

1. Ag/mol
2. Bg/L
3. Cmol/g
4. Dmol/L

A plastic block has a density of 0,8 g/cm³. What happens when it is placed in water (density 1,0 g/cm³)?

1. AIt floats
2. BIt stays suspended halfway down
3. CIt dissolves
4. DIt sinks

When mercury(II) oxide is heated, it reacts as 2HgO → 2Hg + O₂. What type of reaction is this?

1. ASynthesis
2. BCombustion
3. CDecomposition
4. DSingle replacement

في التفاعل 2H₂ + O₂ → 2H₂O، كم مولًا من الماء يتكوّن من 3 مولات من الأكسجين؟

1. A1,5 mol
2. B6 mol
3. C2 mol
4. D3 mol

Pepsin digests protein in the stomach at about pH 2, but it stops working once food moves into the small intestine, where the pH is higher. Why?

1. APepsin is used up completely in the stomach, just like a reactant
2. BThe small intestine is too cold for any enzyme
3. CPepsin only works on fats in the small intestine
4. DThe change in pH alters the shape of pepsin's active site

In the reaction NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq), which ions are spectator ions?

1. AAg⁺ and Cl⁻
2. BNa⁺ and NO₃⁻
3. CNa⁺ and Cl⁻
4. DAg⁺ and NO₃⁻