ورقة عمل الكيمياء لامتحانات القبول في التمريض مع الإجابات

What is a precipitate?

1. AA substance that speeds up a reaction
2. BA liquid that forms when a solid melts
3. CA gas that bubbles out when two solutions are mixed
4. DAn insoluble solid that forms when two solutions react

What is the maximum number of electrons the first electron shell can hold?

1. A2
2. B8
3. C1
4. D18

According to the Arrhenius definition, what does a base produce in water?

1. AHydrogen ions (H⁺)
2. BChloride ions (Cl⁻)
3. CHydroxide ions (OH⁻)
4. DCarbonate ions (CO₃²⁻)

When diluting a concentrated acid, which method is safe?

1. AAdd the water quickly to the acid
2. BAdd the acid slowly to the water
3. CMix them in any order, as long as it is fast
4. DAdd the water slowly to the acid

أي عنصر هو الأعلى سالبية كهربائية؟

1. Aالصوديوم
2. Bالفلور
3. Cالحديد
4. Dالهيليوم

How many molecules are in 2 mol of carbon dioxide?

1. A3,01 × 10²³
2. B1,20 × 10²⁴
3. C6,02 × 10²³
4. D2,00 × 10²³

أي عبارة عن المحفِّز في تفاعل عكوس صحيحة؟

1. Aيزيد كمية الناتج عند الاتزان
2. Bيُستهلك مع تقدم التفاعل
3. Cيسرّع الاتجاهين بالتساوي
4. Dيسرّع التفاعل الأمامي فقط ويوقف التفاعل العكسي

An element in period 3 forms an oxide with the formula X₂O₃. Which element is X?

1. AAluminium
2. BMagnesium
3. CPhosphorus
4. DSodium