Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the ___________________?

Related Mcqs:

Raw materials for nitric acid manufacture are___________________?

A. Hydrogen peroxide, air and water B. Anhydrous ammonia and air C. Anhydrous ammonia, air and water D. Wet ammonia, air and water...

Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ____________ this is normally not done?

A. Increased biuret formation B. High corrosion rate C. Increased cost of equipment D. All A., B. & C....

P2O5 content in superphosphate is about _____________ percent?

A. 30-35 B. 15-20 C. 65-70 D. 85-90...

Urea (a nitrogenous fertiliser) is produced from carbon dioxide and__________________?

A. Nitric acid B. Ammonia C. Ammonium nitrate D. Nitric oxide...

Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the__________________?

A. Osmotic pressure of the soil water becomes less than that of the plant sap B. Soil becomes too alkaline C. Osmotic pressure of the soil water becomes higher than that of the plant sap D. Soil becomes too acidic...