Please do this
Dear student
1. option A, good fuels should ignite at lower temperature and should be able to give maximum output for the burning purpose ( high calorific value)
2. option B, carbon monoxide is formed in such cases, during complete combustion carbon dioxide is formed.
3. option D, Coal contains many impurities and sulfur is one of them. When coal is burnt the sulfur combines with oxygen and the sulfur oxides are released to the atmosphere
4. option D, any of these options would prevent the process of burning
5. option A, Due to complete combustion, the outer zone is blue. This blue-coloured zone is the non-luminous part of the flame.
Regards
1. option A, good fuels should ignite at lower temperature and should be able to give maximum output for the burning purpose ( high calorific value)
2. option B, carbon monoxide is formed in such cases, during complete combustion carbon dioxide is formed.
3. option D, Coal contains many impurities and sulfur is one of them. When coal is burnt the sulfur combines with oxygen and the sulfur oxides are released to the atmosphere
4. option D, any of these options would prevent the process of burning
5. option A, Due to complete combustion, the outer zone is blue. This blue-coloured zone is the non-luminous part of the flame.
Regards