ورقة عمل الكيمياء لامتحانات القبول في التمريض مع الإجابات

أي مما يلي تغيّر كيميائي؟

1. Aتحطم الزجاج
2. Bذوبان الجليد (انصهاره)
3. Cاحتراق الخشب
4. Dذوبان السكر في الشاي

أي مادة قاعدة؟

1. Aحمض الهيدروكلوريك (HCl)
2. Bالخل (حمض الخليك)
3. Cهيدروكسيد الصوديوم (NaOH)
4. Dعصير الليمون (حمض الستريك)

ماذا يسمى العمود الرأسي في الجدول الدوري؟

1. Aمجموعة
2. Bسلسلة
3. Cدورة
4. Dغلاف

The amino acid glycine has an –NH₂ group and a –COOH group. What are these two groups called?

1. AA carbonyl group and an ester group
2. BA hydroxyl group and a methyl group
3. CAn amino group and a carboxyl group
4. DA phosphate group and a hydroxyl group

Which nuclear process powers the Sun?

1. ACombustion of hydrogen gas with oxygen in its core
2. BFusion of hydrogen nuclei to form helium
3. CAlpha decay of helium
4. DFission of uranium into smaller nuclei

Uranium-235 and uranium-238 both have 92 protons. How many more neutrons does an atom of uranium-238 have?

1. A0
2. B92
3. C3
4. D146

Ammonia (NH₃) has three bonding pairs and one lone pair on nitrogen. What is its shape?

1. AFlat triangle (trigonal planar)
2. BTrigonal pyramidal
3. CLinear
4. DTetrahedral

Na⁺, Mg²⁺, F⁻ and O²⁻ all have 10 electrons. Which ion is the largest?

1. AMg²⁺
2. BO²⁻
3. CF⁻
4. DNa⁺