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प्रश्न
The industrial process used for the manufacture of caustic soda involves electrolysis of an aqueous solution of compound 'X'. In this process, two gases 'Y' and 'Z' are liberated. 'Y' is liberated at cathode and 'Z', which is liberated at anode, on treatment with dry slaked lime forms a compound 'B'. Name X, Y, Z and B.
उत्तर
X = NaCl (Sodium chloride);
Y = H2 (Hydrogen gas);
Z = Cl2 (Chlorine gas);
B = Bleaching powder (CaOCl2)
\[\ce{2NaCl(aq) + 2H2O(l)->2NaOH(aq) + Cl2(g) + H2(g)}\]
\[\ce{Ca(OH)2 + Cl2->CaOCl2 + H2O}\]
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संबंधित प्रश्न
We need 20% aqueous solution of sodium hydroxide for the study of saponification reaction. When we open the lid of the bottle containing solid sodium hydroxide we observe it in which form?
(A) Colourless transparent beads
(B) Small white beads
(C) White pellets/flakes
(D) Fine white powder
A student Prepared 20% sodium hydroxide solution in a beaker to study saponification reaction. Some observations related to this are given below :
(I) Sodium hydroxide solution turns red litmus blue
(II) Sodium hydroxide readily dissolves in water
(III) The beaker containing solution appears cold when touched from outside
(IV) The blue litmus paper turns red when dipped into the solution
The correct observations are :-
(A) I, II and IV
(B) I, II and III
(C) only III and IV
(D) only I and II
Write the chemical name and formula of caustic soda.
The electrolysis of an aqueous solution of sodium chloride gives us three products. Name them.
During the electrolysis of a saturated solution of sodium chloride, where is:
hydrogen formed?
During the electrolysis of a saturated solution of sodium chloride, where is:
sodium hydroxide formed?
A student prepared 20% sodium hydroxide solution in a beaker containing water. The observations noted by him are given below.
I. Sodium hydroxide is in the form of pellets.
II. It dissolves in water readily.
III. The beaker appears cold when touched from outside.
IV. The red litmus paper turns blue when dipped into the solution.
The correct observations are:
(A) I, II, and III
(B) II, III and IV
(C) III, IV and I
(D) I, II and IV
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
Sodium hydroxide is termed an alkali while Ferric hydroxide is not because ______.
While electrolysing water before passing the current some drops of an acid are added. Why? Name the gases liberated at cathode and anode. Write the relationship between the volume of gas collected at anode and the volume of gas collected at cathode.
