ورقة عمل الكيمياء لامتحانات القبول في التمريض مع الإجابات

What does the prefix "milli-" mean?

1. AOne-millionth (10⁻⁶)
2. BOne thousand (10³)
3. COne-hundredth (10⁻²)
4. DOne-thousandth (10⁻³)

What does the rule "like dissolves like" mean?

1. APolar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar ones
2. BSolids dissolve only in other solids
3. COnly substances with identical formulas can ever dissolve in each other
4. DEvery substance dissolves in water

What is the half-life of a radioactive isotope?

1. AThe time taken for half of the radioactive atoms in a sample to decay
2. BThe time taken for the mass of a sample to double in size
3. CHalf the time it takes for all the atoms to decay
4. DHalf the number of protons in the nucleus

أي معاملات توازن __N₂ + __H₂ → __NH₃؟

1. A1, 3, 1
2. B1, 1, 1
3. C1, 3, 2
4. D2, 3, 2

كيف يؤثر ارتفاع درجة الحرارة عادةً في مقدار ما يذوب من مادة صلبة في الماء؟

1. Aيذوب منها أكثر
2. Bتتحول المادة الصلبة إلى غاز
3. Cيذوب منها أقل
4. Dلا أثر له في المواد الصلبة

When two monomers join to form a larger molecule and a water molecule is released, what is the reaction called?

1. AHydrolysis (splitting with water)
2. BCombustion
3. CCondensation (dehydration synthesis)
4. DNeutralisation

Which 1-litre solution lowers the freezing point of water the most?

1. A0,5 M NaCl
2. B1 M CaCl₂
3. C1 M glucose
4. D1 M NaCl

Cells oxidise glucose to CO₂ and water, as burning glucose does. How does cellular respiration differ from burning?

1. AIt produces different products from burning
2. BIt does not need oxygen at any stage
3. CIt releases the energy in many small, enzyme-controlled steps
4. DIt releases much more total energy than burning the same glucose