What role does the wire play in voltaic cell?

a) it allows electrons to flow from the anode to the cathode.

b) it allows migration of ions from one half-cell to the other.

c) it connects to the salt bridge.

d) it creates the reduction reaction.

Answer;

a) It allows electrons to flow from the anode to the cathode.

Explanation;Voltaic cell is an electrochemical cell in which a spontaneous chemical reaction produces the flow of electrons.Electrons are produced by the oxidation reaction occurring at the anode. Electrons flow through the conducting wire from the anode to the cathode. At the cathode these electrons are used to reduce copper(II) ions to copper atoms.A conducting wire or a wire play connects the two electrodes allowing electrons to flow from the anode to the cathode.

False because saturated fatty acids contain only single bond

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.