Fuels and Combustion
The reaction, C + CO₂ ⟷ 2CO, taking place during coal gasification is called the __________ reaction. n.

Neumann reversal
Reduction
Boudouard
Shift conversion

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Fuels and Combustion
Calorific value of

Light paraffinic fuel oils is lower than that of equivalent olefins
Light paraffinic fuel oils is higher than that of equivalent olefins
Light paraffinic fuel oils is equal to that of equivalent olefins
N-paraffin is lower than that of iso-paraffins of the same compounds

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Fuels and Combustion
Ratio of primary air to secondary air increases with increase in the rank of coal, because the

Ratio of fixed carbon to volatile matter increases
Calorific value of the coal increases
Oxygen content progressively decreases
High rank coals have higher amount of volatile matter

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