Chemistry quick practice

Question 1 of 10

The IUPAC name of CH₃CH(CH₃)CH₂CH₃ is

Question 2 of 10

According to collision theory, a reaction occurs when particles collide

Question 3 of 10

How many moles of NaOH are needed to neutralise 0.2 mol of sulphuric acid completely?

Question 4 of 10

Increasing temperature increases reaction rate mainly because

Question 5 of 10

15 cm³ of 0.2 mol/dm³ H₂SO₄ neutralised 25.0 cm³ of NaOH. H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O. Find the concentration of the NaOH.

Question 6 of 10

Which group 2 hydroxide is the most soluble in water?

Question 7 of 10

Identify the conjugate acid–base pairs in each reaction: (a) HNO₃ + H₂O ⇌ H₃O⁺ + NO₃⁻, (b) NH₃ + H₂O ⇌ NH₄⁺ + OH⁻, (c) HCO₃⁻ + H₂O ⇌ H₂CO₃ + OH⁻.

Question 8 of 10

Group 1 metals form ions with a charge of

Question 9 of 10

Sodium carbonate does not decompose when heated in a Bunsen flame.

Question 10 of 10

The enthalpy of neutralisation of a weak acid is less exothermic because