Chemistry revision practice questions.
30 review questions to get ready for chemistry tests.
1. State four characteristic properties of metals
2. State three conditions necessary for the establishment of a chemical equilibrium
3. State Dalton's Law of partial pressure
4. Using the collision theory, explain why some reactions do not occur after collision of
reacting particles
5. (i) What is a primary standard
(ii) Give a property of sodium hydroxide that makes it unsuitable for use as a primary
standard
6. State two criteria that could be used to ascertain the purity of a substance
7. State three factors that affect the rate of a reaction
8. a.Define ionization energy
b.Explain how ionization energy varies across the periodic table.
9. If 10.2g of salt Q dissolves in 15.4cm3 of distilled water at 40°C , calculate the solubility
of Q in mol/dm-3 at 40°C (Mr = 331)
10. Give the IUPAC name of the following:
(i) Al(NO3)3
(ii) HClO3
11. (i) Define the term standard heat of reaction
(ii) Mention two types of standard heat of reaction that are exothermic
12. In a reaction it was found that 3.0g of a metal, X was seized by25.0cm3 of 0.10 moldm-3
K2Cr2O7 under acidic conditions.
(i) Deduce the mole ratio between X and Cr2O7 -2 ion
(ii) Write a balanced equation of the redox reaction
(iii) Give the oxidation numbers of chromium and X in both their reduced and oxidized
forms
( Molar mass of X = 200.6)
13. (i) State five postulates of the kinetic theory of gases
(ii) A gas of mass 0.8g has a volume of 560cm3 at 0°C and 1atm pressure.
Calculate the molar mass of the gas.
( R= 8.31JK-1mol-1 ; 1 atm = 101325 Nm-2 )
14. Chromium has an atomic number of 24. Arrange giving reason, the following ions in
order of increasing paramagnetic strength. Cr2+,Cr3+, Cr6+
15. (i) Define the term enthalpy of neutralization
(ii) Explain briefly why the enthalpy of neutralization determined for HCl(aq) and KOH(aq)
is greater than that of CH3COOH(aq) and KOH(aq)
(iii) When an acid and a base react, water is produced. Explain why the standard
enthalpy of neutralization of an acid and a base is not the same as the standard enthalpy
of formation of water.
16. (i)Define buffer solution
(ii)Which of the following pairs of pairs of chemicals would act as a buffer solution:
30 review questions to get ready for chemistry tests.
1. State four characteristic properties of metals
2. State three conditions necessary for the establishment of a chemical equilibrium
3. State Dalton's Law of partial pressure
4. Using the collision theory, explain why some reactions do not occur after collision of
reacting particles
5. (i) What is a primary standard
(ii) Give a property of sodium hydroxide that makes it unsuitable for use as a primary
standard
6. State two criteria that could be used to ascertain the purity of a substance
7. State three factors that affect the rate of a reaction
8. a.Define ionization energy
b.Explain how ionization energy varies across the periodic table.
9. If 10.2g of salt Q dissolves in 15.4cm3 of distilled water at 40°C , calculate the solubility
of Q in mol/dm-3 at 40°C (Mr = 331)
10. Give the IUPAC name of the following:
(i) Al(NO3)3
(ii) HClO3
11. (i) Define the term standard heat of reaction
(ii) Mention two types of standard heat of reaction that are exothermic
12. In a reaction it was found that 3.0g of a metal, X was seized by25.0cm3 of 0.10 moldm-3
K2Cr2O7 under acidic conditions.
(i) Deduce the mole ratio between X and Cr2O7 -2 ion
(ii) Write a balanced equation of the redox reaction
(iii) Give the oxidation numbers of chromium and X in both their reduced and oxidized
forms
( Molar mass of X = 200.6)
13. (i) State five postulates of the kinetic theory of gases
(ii) A gas of mass 0.8g has a volume of 560cm3 at 0°C and 1atm pressure.
Calculate the molar mass of the gas.
( R= 8.31JK-1mol-1 ; 1 atm = 101325 Nm-2 )
14. Chromium has an atomic number of 24. Arrange giving reason, the following ions in
order of increasing paramagnetic strength. Cr2+,Cr3+, Cr6+
15. (i) Define the term enthalpy of neutralization
(ii) Explain briefly why the enthalpy of neutralization determined for HCl(aq) and KOH(aq)
is greater than that of CH3COOH(aq) and KOH(aq)
(iii) When an acid and a base react, water is produced. Explain why the standard
enthalpy of neutralization of an acid and a base is not the same as the standard enthalpy
of formation of water.
16. (i)Define buffer solution
(ii)Which of the following pairs of pairs of chemicals would act as a buffer solution:
