Chemistry
The advantage of detergents over soaps is

Detergents could not give much lather
Detergents give lather even with hard water
Soaps give lather with only soft water
Detergents are soluble in water

ANSWER DOWNLOAD EXAMIANS APP

Chemistry
The open "Sigrees" or coal stoves often require fanning to sustain burning because of

Lack of oxygen in the surroundings of sigrees
Tendency of carbon dioxide to form a layer along with dust smoke
Interrupted release of moisture from the material
Accumulation of smoke and dust over the sigrees

ANSWER DOWNLOAD EXAMIANS APP