Fertiliser Technology

31.Ammonium sulphate fertiliser is

1. The highest concentration nitrogenous fertiliser
2. The best fertiliser for paddy
3. A basic fertiliser
4. A neutral fertiliser

View answer

32.An increase in the NH₃/CO₂ ratio in urea manufacture results in

1. Increased degree of conversion of CO₂ to urea
2. Decreased degree of conversion of NH₃ to urea
3. Decreased yield of urea
4. Decreased specific volume of molten mass

View answer

33.Base suspension fertiliser essentially contains

1. 13% N₄ and 43% P₂O₅
2. 43% N₄ and 13% P₂O₅
3. 43% N₄ and 13% K₂O
4. 43% K₂O and 43% P₂O₅

View answer

34.Bio-fertilisers are cheaper, renewable and pollution free. They improve the _________ of the soil.

1. Nutrient supply
2. Texture
3. Water holding capacity
4. All (A), (B) and (C)

View answer

35.Biuret formation in urea is kept at minimum (< 1 %), because it is

1. Corrosive in nature
2. Toxic and harmful to some crops
3. Helpful in decomposition of urea
4. Explosive in nature

View answer

36.Both white phosphorous as well as red phosphorous

1. Are soluble in CS2
2. Burns when heated in air
3. Reacts with hot caustic soda solution to give Phosphine
4. All (A), (B), and (C)

View answer

37.C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about

1. 2
2. 6
3. 13
4. 20

View answer

38.CaH₄(PO₄)₂ is the chemical formula of

1. Superphosphate
2. Triple superphosphate
3. Calcium phosphate
4. Meta phosphoric acid

View answer

39.Catalyst used in ammonia synthesis uses _________ as a promoter.

1. Pt
2. K₂O
3. Al₂O₃
4. Ni

View answer

40.Catalyst used in desulphurisation of naphtha is

1. Co-Mo
2. Pt-Rh
3. Silica gel
4. Nickel

View answer