Dehydration of ethanol produces
- A. ethanoic acid
- B. propan-1,2,3-triol
- C. ethene
- D. ethanal
- E. methanol
Petrol consists mainly of
- A. polymers
- B. alkanoates
- C. hydrocarbons
- D. alktanols
- E. alkenes
Which of the following alkanes has the highest boiling point?
- A. pentane
- B. ethane
- C. propane
- D. butana
- E. hexane
The liquid product of the destructive distillation of coal is
- A. kerosene
- B. ethanol
- C. ammoniacal liquor
- D. paraffin oil
- E. aqueous ammonia
Which of the following can undergo both addition reactions and substitution reactions?
- A. Benzene
- B. Pentane
- C. Propene
- D. Hexane
- E. Ethene
A device used in the laboratory for intermittent production of gases without heating is
- A. Leibing condenser
- B. aspirator
- C. delivery tube
- D. inverted funnel
- E. Kipp's apparatus
Metals are said to be malleable because they
- A. are good conductors heat
- B. are good conductors of electricity
- C. can be beaten into sheets
- D. can be alloyed
- E. can be polished
Aluminium is extracted from
- A. magnetite
- B. cryolite
- C. bauxite
- D. cassiterite
Rusting of iron is an example of
- A. deliquescence
- B. decomposition
- C. displacement reaction
- D. redox reaction
- E. reversible reaction
Two metallic ions commonly present in hard water are
- A. Ca2+ and Zn2+
- B. Cu2+ and Na+
- C. Mg2+ and Ca2+
- D. Fe2+ and Na+
- E. Zn2+ and Cu2+
The spontaneity of a chemical reaction is determined by the change in the
- A. concentration of the reactants
- B. temperature of the system
- C. free energy of the system
- D. pressure applied to the system
- E. volume of the reactants
Which of the following can be added to dissolve the precipitate formed in the reaction represented by the following equation? CaCl2(aq) + H2C2O 4(s) ⇌ CaC 2O2
- A. Calcium chloride solution
- B. Concentrated hydrochloric acid
- C. Ethanol
- D. Ethanedioc acid
- E. Aqueous ammonia
Pipe-borne water is usually chlorinated in order to
- A. improve the teste of the water
- B. remove the hardness in the water clear
- C. coagulate sediments in the water
- D. kill harmful bacteria in the water
- E. make the water clear and colourless
Substances which absorb water from the atmosphere without dissolving in it are sid to be
- A. anhydrous
- B. hygroscopic
- C. insolube
- D. hydrated
- E. efflorescent
How many electrons are removed from Cr2- when it is oxidized to CrO42-?
- A. o
- B. 2
- C. 4
- D. 8
- E. 10
What mass of copper would be deposited by a current of 1. 0 ampere passing for 965 seconds through copper (ll) tetraoxosulphate (IV) solution? [Cu = 63.5; 1F = 96500C]
- A. 0.318g
- B. 0.635g
- C. 18g
- D. 6.35g
- E. 9.65g
Which of the following will produce oxygen and hydrogen during its electrolysis using platinum electrode?
- A. Glucose solution
- B. Aqueous copper (ll) tetraoxosulphate (IV)
- C. Dilute sodium chloride solution
- D. Concentrated hydrochloric acid
- E. Dilute copper (ll) chloride solution
What is the function of sulphur (IV) oxide in the reaction represented by the following equation? SO 2(aq) + 2H2S(g) → 3S (s) + 2H 2O (l)
- A. Dehydrating agent
- B. Oxidising agent
- C. Bleaching agent
- D. Acid
- E. Precipitant
Which of the following methods is suitable for the preparation of an insoluble salt?
- A. Action of an acid on a metal
- B. Double decomposition
- C. Neutralisation
- D. Action of an acid on a trioxocarbonate (IV)
- E. Action of an acid on an oxide
Which of the following is not a property of trioxonitrate (V) salts?
- A. Positive reaction to the brown ring test
- B. Ability to dissolve in cold water
- C. Decomposition on being strongly heated
- D. Production of effervescence with saturated Na2CO3 solution
- E. Evolution of gas with concentrated H2SO4 and copper turnings
The following oxides react with water except
- A. Na2O
- B. SO3
- C. NO2
- D. CO2
- E. CuO