Advertisements
Advertisements
Question
A solution of caustic soda (NaOH) in water or when fused, conducts an electric current. What is the similarity in these two cases?
Solution
In the aqueous state, the slightly negatively charged oxygen atoms of the polar water molecule exerts a pull on the positively charged sodium ions. A similar pull is exerted by the slightly charged hydrogen atoms of the water on the negatively charged chloride ions. Thus the ions become free in solution. These free ions conduct electricity.
In the molten state, the high temperatures required to melt the solid weakens the bond between the particles and the ions are set free.
APPEARS IN
RELATED QUESTIONS
Explain why it is preferable to use a number of graphite electrodes as the anode instead of a single electrode, during the above electrolysis.
Complete the sentence by choosing correct word given in bracket.
Electrolysis is the passage of ___________________
(electricity / electrons)
Complete the sentence by choosing correct word given in bracket.
through a liquid or a solution accompanied by a ___________ (Physical / chemical) change.
Choose the correct answer from the option given below:
Which among the following anions will discharge with ease at anode?
Choose the correct answer from the option given below:
In electrolysis of molten lead bromine anode is made up of
Define or explain the term: Electrolysis.
Identify the following reactions as either oxidation or reduction : K - e- → K+
We can expect that pure water ______ normally conducts electricity.
Electrolysis is the passage of ______ through a liquid or a solution accompanied by a ______ change.
Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.
Write equations to show how X and Y form ions?
