Q. 924.8( 5 Votes )
An element A which is a part of common salt and kept under kerosene reacts with another element B of atomic number 17 to give a product C. When an aqueous solution of product C is electrolyzed then a compound D is formed and two gases are liberated.
(a) What are A and B?
(b) Identify C and D.
(c) What will be the action of C on litmus solution? Why?
(d) State whether element B is a solid, liquid or gas at room temperature.
(e) Write formula of the compound formed when element B reacts with an element E having atomic number 5.
Answer :
(a) In the above given question element A is sodium and element B is chlorine. Because element A is a part of common salt and also kept under kerosene where as another element B has an atomic number 17.
(b) Here element C is sodium chloride and element D is sodium hydroxide.
(c) Element C will turn the litmus solution blue. Because a basic element will turn the litmus solution blue.
(d) From the above given statement we can say the element B is a gas.
(e) The formula of the compound formed when element B reacts with an element E having atomic number 5 is EB3.
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PREVIOUSZinc blende ore can be converted into zinc oxide by the process of :NEXTA metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
(a) Name the metal and write its chemical symbol.
(b) Write the name and formula of the sulphide ore.
(c) Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
(d) Name a common 'device in which this metal is used.
(e) Can this metal displace copper from copper sulphate solution? Why?
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