ورقة عمل الكيمياء لامتحانات القبول في التمريض مع الإجابات

What is a precipitate?

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

What should a student always wear to protect the eyes when working with chemicals?

1. AContact lenses
2. BReading glasses
3. CSunglasses
4. DSafety goggles

Which unit is commonly used for the density of a liquid?

1. Ag·mL
2. Bg/mL
3. CmL/g
4. Dkg

ما الكتلة المولية للماء (H = 1 g/mol، O = 16 g/mol)؟

1. A17 g/mol
2. B32 g/mol
3. C18 g/mol
4. D10 g/mol

Why is a carbon dioxide extinguisher effective on many fires?

1. ACO₂ is denser than air and pushes oxygen away from the fire
2. BCO₂ adds oxygen to cool the flames
3. CCO₂ reacts chemically with the fuel to make it non-flammable
4. DCO₂ is a liquid that soaks into the fuel

How does a catalyst speed up a reaction?

1. AIt adds extra reactant to the mixture
2. BIt makes the reaction more exothermic
3. CIt provides a different pathway with a lower activation energy
4. DIt raises the temperature of the reactants so they move faster

غاز تحت ضغط 1 atm في وعاء سعته 6 L. عند درجة الحرارة نفسها ضُغط إلى 2 L. ما الضغط الجديد؟

1. A4 atm
2. B0,33 atm
3. C3 atm
4. D12 atm

أي مما يلي حمض ضعيف؟

1. Aحمض الخليك (في الخل)
2. Bحمض الهيدروكلوريك
3. Cحمض الكبريتيك
4. Dحمض النيتريك