ورقة عمل الكيمياء لامتحانات القبول في التمريض مع الإجابات

For a given substance, in which state do its particles move fastest?

1. AGas
2. BSolid
3. CThey move at the same speed in all states
4. DLiquid

What does the double arrow (⇌) in a chemical equation show?

1. AThe reaction is reversible
2. BThe reaction needs a catalyst
3. CThe reaction is very fast
4. DThe reaction releases heat

أي مجموعة تضم الغازات النبيلة، مثل الهيليوم والنيون؟

1. Aالمجموعة 17
2. Bالمجموعة 18
3. Cالمجموعة 2
4. Dالمجموعة 1

When a nucleus emits a beta particle, how do its mass number and atomic number change?

1. AMass number falls by 4 and atomic number falls by 2
2. BMass number rises by 1 and atomic number stays the same
3. CMass number stays the same and atomic number rises by 1
4. DBoth fall by 1

ما نواتج الاحتراق التام لهيدروكربون مثل الميثان؟

1. Aأول أكسيد الكربون والهيدروجين
2. Bثاني أكسيد الكربون والماء
3. Cالكربون وغاز الهيدروجين
4. Dالأكسجين والماء

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. BAn amino group and a carboxyl group
3. CA hydroxyl group and a methyl group
4. DA phosphate group and a hydroxyl group

The true volume in a flask is 10,0 mL. A student measures it three times and gets 8,1 mL, 8,1 mL and 8,2 mL. How are these results best described?

1. AAccurate but not precise
2. BPrecise but not accurate
3. CBoth accurate and precise
4. DNeither accurate nor precise

Using PV = nRT with R = 0,082 L·atm/(mol·K), how many moles of gas are in 24,6 L at 1 atm and 300 K?

1. A0,5 mol
2. B1 mol
3. C300 mol
4. D2 mol