Chemistry
Answer
Carbon tetrachloride (CCl4) is a liquid that does not conduct electricity because it is a non-polar covalent compound. In the case of CCl4, carbon atom shares electrons with four chlorine atoms. The electrons are shared equally between the atoms, and the molecule has no permanent dipole moment, meaning there is no separation of charge. Therefore, there are no ions present in the compound, and no free electrons to carry an electrical current.
Related Questions
Copy and complete the following table which refers to two practical applications of electrolysis.
Anode Electrolyte Cathode (i) Silver plating of a spoon Solution of potassium argentocyanide (ii) Purification of copper (iii) Extraction of copper Write the equation taking place at the anode for Q. 2(a).
The following sketch represents the electroplating of an Iron cup with Nickel metal. Study the diagram and answer the following questions:
(a) During electroplating the iron cup is placed at the cathode. Why?
(b) Name the ion that must be present in the electrolyte.
(c) State one condition that is necessary to ensure that the deposit is smooth, firm and even.
(d) Write the reaction taking place at the cathode.
(e) What change would you observe at the anode?
Copper sulphate soln. is electrolysed using copper electrodes as seen in diagram.
(i) Which electrode to your left or right is known as the oxidising electrode and why?
(ii) Write the equation representing the reaction that occurs.
(iii) State two appropriate observations for the above electrolysis reaction.