The Two types of fermentations are carried out of the production of a. Pickle
b. yougurt
c. vinegar
d. Sausages​

Acovalent bond is formed between the two hydrogen bonds

Reducing agents  oxidized by the reaction 

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m