Reaction undergone by compounds with the general formula Cn H2n+2 include
- A. addition
- B. esterification
- C. substitution
- D. dehydration
Determine the mass of copper deposited by 4.0 moles of electrons in the reaction represented by the equation below: Cu2(aq) + 2e– → Cu(s)
- A. 32
- B. 64
- C. 128
- D. 256
The main difference between a primary cell and a secondary cell is that the primary cell
- A. is an electrolytic cell but the secondary is not
- B. cannot be recharged but the secondary cell can
- C. can be recharged but the secondary cell cannot
- D. contains electrodes but the secondary cell does not
Which of the elements will burn in excess oxygen to form a product that is neutral to litmus?
- A. Carbon
- B. Hydrogen
- C. Sulphur
- D. Sodium
Which of the following reactions is sulphur (IV) oxidizing agent?
- A. 2HNO 3(aq) + SO2(g) → H2SO4(aq) + 2NO2(g)
- B. 2KMnO 4(aq) + 5SO2(g) + 2H2O → K2SO4(aq) +MnSO4(aq) 2H2SO4(aq)
- C. FeCI3(aq) + SO2(g) + 2H2O(l) → FeCI 2(g)+ 2HCI(g) + H2SO4(aq)
- D. 2H2S(g) + SO2(g) →2H2O(l) + 3S(s)
Which of the following methods is suitable for preparing insoluble salts?
- A. Thermal decomposition
- B. Oxidation
- C. Double decomposition
- D. Neutralization
When ice is changing to water, its temperature remains the same because the heart gained is
- A. used to separate the molecules
- B. lost partially to the atmosphere
- C. used to increase the volume of ice
- D. less than the activation energy
Which of the following compounds dissolves readily in water?
- A. BaSO4
- B. CuSO3
- C. NH4CI
- D. AgCI
Consider the reaction represented by the equation below, xNH3(g) + yCI2(g) → zHCI(g) + N2(g) The values of x,y and z are respectively
- A. 2, 4, 6
- B. 3, 2, 4
- C. 2, 3, 6
- D. 3, 2 6
A salt that absorbs moisture from the atmosphere without forming a solution is said to be
- A. efflorescent
- B. deliquescent
- C. hygroscopic
- D. insoluble
What process is involved in the reaction represented by the following equation? AICI3 + 3H2O(l) → AI(OH) 3(s) + 3HCI(g)
- A. dehydration
- B. hydrolysis
- C. double decomposition
- D. Neutralization
NaHCO3(s) can be distinguished from Na2CO3(s) by the action of
- A. dilute hydrochloric acid
- B. carbon (IV) oxide
- C. aqueous ammonia
- D. heat
Which of the following is not an acid anhydride?
- A. P 2O 5
- B. NO 2
- C. SO 2
- D. CO
HNO3 does not usually react with metals to liberate hydrogen because HNO3 is
- A. a strong acid
- B. a corrosive acid
- C. an oxidizing agent
- D. a nitrating agent
Which of the following statements is not a postulate of the kinetic theory of gases?
- A. Molecules move with the same speed
- B. intermolecular forces are negligible
- C. Molecules are in a state of constant random motion
- D. collision between molecules is elastic
When X is heated with manganese (IV) oxide, oxygen is produced X is
- A. KCI
- B. KCIO3
- C. CaCO3
- D. ZnCO3
Which of the following factors does not affect the rate of reaction of CaCO3 with HCI?
- A. temperature of the reaction
- B. solubility of the CaCO3
- C. concentration of the HCI
- D. surface area of the CaCO3
The activation energy of a reaction can be altered by
- A. adding a reducing agent
- B. applying a high pressure
- C. using a catalyst
- D. changing the temperature
In which of the following reactions is the position of equilibrium not affected by an increase in pressure?
- A. 3Fe(s) + 4H2O(g) ⇌ Fe3O4(s) + 4H2(g)
- B. 2NO2(g) ⇌ N2O 4(g)
- C. 3H2(g) + N2(g) ⇌ 2NH3(g)
- D. 2SO2(g) + O2(g) ⇌ 2SO3(g)
The volume occupied by a given mass of gas depends on its
- A. diffusion rate
- B. temperature and pressure
- C. degree of solubility
- D. relative density
Which of the following molecules has a linear structure?
- A. NH3
- B. H2O
- C. CO2
- D. CH4