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प्रश्न
Powdered sodium chloride (common salt) does not conduct an electric current, but it does so when ______ or when ______.
उत्तर
Powdered sodium chloride (common salt) does not conduct an electric current, but it does so when dissolved in water or when melted.
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संबंधित प्रश्न
Give reasons why Sodium Chloride will conduct electricity only in the fused or aqueous solution state.
Define the following term:
Electrolysis
A solution of caustic soda (NaOH) in water or when fused, conducts an electric current. What is the similarity in these two cases?
Give reason for the following:
Electrolysis of molten lead bromide is considered to be a reaction in which oxidation and reduction go side by side, i.e., a redox reaction.
With reference to the electrolysis of acidulated water, answer the following :
a) why distilled water is a non- electrolyte?
b) What is the electrolytic cell called?
c) State what you would observe at the (i) Cathode (ii) Anode
d) Summarize the electrode reactions.
e) why is electrolysis of acidulated water considered as an example of catalysis?
Fill in the blank :
Non-metallic ions are _____________ because they _____________ electrons.
Name : A positively charged not metallic ion
Give one example of a substance which contain :
molecules only
Write the equations of the reactions which take place at the cathode and anode when acidified water is electrolyzed.
Choose A, B, C or D to match the descriptions (i) to (v) below . Some alphabets may be repeated.
(A) Non-electrolyte, (B) Strong electrolyte, (C) Weak electrolyte, (D) Metallic conductor
(i) Molten ionic compound
(ii) Carbon tetrachloride
(iii) An aluminium wire
(iv) A solution containing solvent molecules, solute molecules and ions formed by the dissociation of solute molecules
(v) A sugar solution with sugar molecules and water molecules.
