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प्रश्न
Fill in the blank from the choices given below :
Electro covalent compounds have a _____ boiling point
पर्याय
low
high
उत्तर
Electro covalent compounds have a high boiling point.
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संबंधित प्रश्न
Identify the substance underlined, in the following case
The particles present in a liquid such as kerosene, that is a nonelectrolyte.
State one relevant observation for the following:
At the anode, when molten lead bromide is electrolyzed using graphite electrodes.
Define the following term:
Non-electrolyte
Name a base which is a weak electrolyte.
Al+3 ,Cu+2 ,Na+ ,Zn+2 ions are present in aqueous solution, such that the concentration of ions is same, write the order of discharge of ions.
A solution of caustic soda (NaOH) in water or when fused, conducts an electric current. what is the similarity in these two cases?
The following Question refer to the electrolysis of copper sulphate solution with copper electrodes:
(a) Compare the change in mass of the anode
(b) What is seen to happen to the colour of the copper sulphate solution if platinum electrodes are used? Explain the observation.
(c) What is the practical application of the electrolysis of copper sulphate solution? Briefly, describe one such application.
The following is an extract from metals in the service of man, Alexander and street /Pelican 1976': Alumina (aluminium oxide) has a very high melting point over 2000oC, so that I cannot readily be liquefied. However, conversion of alumina to aluminium and oxygen, by electrolysis, an occur when it is dissolved in some other substance.
(a) Which solution is used to react with bauxite as first step in obtaining pure aluminium oxide?
(b) The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the equation for this reaction.
(c) Name the element which serves both as the anode and the cathode in the extraction of aluminium.
(d) Write the equation for the reaction that occurs at the cathode during the extraction of aluminium.
(e) Write the equation for the reaction that occurs at the cathode during extraction of aluminium by electrolysis.
(f) Give the equation for the reaction that occurs at the anode when aluminium is purified by electrolysis.
Give appropriate scientific reasons for the following statement:
During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes.
Copper sulphate solution is electrolysed using copper electrodes.
Which electrode [cathode or anode] is the oxidizing electrode? Why?
