Question

Which of the following reactions would result in the formation of a gaseous product?

Answer 1

The  reaction that would result  in formation  of gaseous product  is

KHCO3  +  HBr  ( third  answer)

explanation

KHCO3  react with  HBr  to form  KBr ,  CO2  and H2O  according  to  the  below equation.

KHCO3 + HBr →  KBr  + CO2 + H2O

CO2 ( carbon (IV)  oxide)  is the gas that  is  formed   during   reaction.

other reaction does not produce a   a gas for example  NaOH +   HCl forms  NaCl  and H2O

Answer 2

The third reaction will form a gaseous product, CO₂
KHCO₃ + HBr → KBr + H₂O + CO₂