Question
Chemistry Question on The S-Block Elements
The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are:
A
(A) Cl− and ClO−
B
(B) Cl− and ClO2−
C
(C) Cl− and ClO3−
D
(D) Cl− and ClO4−
Answer
(A) Cl− and ClO−
Explanation
Solution
Explanation:
The reaction between chlorine and cold dilute sodium hydroxide solution is: NaClO3 is sodium chlorate(I). The old name for this is sodium hypochlorite. Actually, the product depends upon the fact whether NaOH used was dilute and cold/concentrated and hot. If Chlorine reacts with cold NaOH, it gives NaCl & NaOCl.⇒Cl− and ClO−Hence, the correct option is (A).