ورقة عمل الكيمياء لامتحانات القبول في التمريض مع الإجابات

ماذا يسمى التحول من الحالة السائلة إلى الغازية؟

1. Aالتبخر
2. Bالتكاثف
3. Cالانصهار
4. Dالتجمد

Between which kinds of elements do covalent bonds usually form?

1. ATwo group 1 metals
2. BA metal and a nonmetal
3. CA metal and a noble gas
4. DTwo nonmetals

What is gamma radiation?

1. AHigh-energy electromagnetic radiation with no mass or charge
2. BA fast stream of protons from the nucleus
3. CA slow-moving electron
4. DA stream of helium nuclei with a positive charge

How does ionisation energy (the energy needed to remove an outer electron) generally change from left to right across a period?

1. AIt first falls, then rises sharply
2. BIt decreases
3. CIt stays the same
4. DIt increases

On an energy diagram, the products are at a lower energy than the reactants. What kind of reaction is shown?

1. ANuclear
2. BReversible only
3. CExothermic
4. DEndothermic

A solution has a pH of 2. What is its hydrogen ion concentration?

1. A1 × 10⁻² mol/L
2. B1 × 10⁻¹² mol/L
3. C1 × 10² mol/L
4. D2 mol/L

A carboxylic acid reacts with an alcohol in the presence of an acid catalyst. What are the products?

1. AAn alkane and oxygen
2. BA salt and hydrogen
3. CAn amino acid and carbon dioxide
4. DAn ester and water

When water boils, what is overcome?

1. AHydrogen bonds between water molecules
2. BThe forces holding the oxygen nucleus together
3. CThe ionic bonds between H⁺ and O²⁻
4. DThe covalent O–H bonds inside each molecule