Chemistry for nursing entrance exams worksheet with answers

What is gamma radiation?

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

What does the rate of a reaction measure?

1. AHow quickly reactants are used up or products are formed
2. BHow hot the reaction gets
3. CHow much product forms in total by the end
4. DHow much energy the final products contain

Which type of bond forms when electrons are shared between atoms?

1. AA covalent bond
2. BA nuclear bond
3. CAn ionic bond
4. DA metallic bond

In the reaction 2H₂ + O₂ → 2H₂O, how many moles of water form from 3 moles of oxygen?

1. A3 mol
2. B2 mol
3. C1.5 mol
4. D6 mol

Why must temperatures be in kelvin in gas law calculations?

1. ACelsius can only be used for liquids
2. BGas volume and pressure are proportional to the absolute temperature
3. CKelvin values are always below 100
4. DThe kelvin scale has smaller degrees, which gives more precise answers

According to the Brønsted–Lowry definition, what is an acid?

1. AAn electron pair donor
2. BA proton (H⁺) donor
3. CA hydroxide ion donor
4. DA proton (H⁺) acceptor

Balance __Fe + __O₂ → __Fe₂O₃ with the smallest whole numbers. What are the coefficients?

1. A4, 3, 4
2. B2, 1, 1
3. C4, 3, 2
4. D2, 3, 1

What is the formula of iron(III) chloride?

1. AFe₃Cl
2. BFeCl₃
3. CFe₂Cl₃
4. DFeCl₂