Answer:
A double replacement reaction <u> do not</u> take place if a solution of sodium hydrogen carbonate is added to a solution of sodium chloride.
NO reaction occur.
Explanation:
Double replacement Reaction : A reaction in which positive and negative ions of two different compound exchange to form new compounds.
This is also called metathesis reaction.
For Example :

Here Na+ and Sr2+ has exchanged
Cl- and SO4(2-) has exchanged their places.
So , Requirement of Double displacement reaction is :
Their should be salts of <u>different cation and anion</u>
= sodium hydrogen carbonate =Na+ cation
and HCO3 - anion
NaCl = Sodium Chloride = Na+ cation and Cl- anion
In both the reacts the cation is : Na+
So No-exchange of ions occur .
No- double displacement reaction.
The reality is , this reaction can't occur at all. It can neither be acid-base nor Redox Reaction
So ,
