Comment
Share
Q)

# Which of the following fuel gases has the highest calorific value?

$\begin{array}{1 1}\text{Water gas}\\\text{Coal gas}\\\text{Producer gas}\\\text{Semi-water gas}\end{array}$

Comment
A)
Water gas is a mixture of CO and $H_2$,both present in equal amounts.It has the highest calorific value,because both CO and $H_2$ burn and evolve heat.