Question: 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 & C

Question: Dehydration of ammonium carbamate to yield urea is a/an __________________ reaction?

• 1. Exothermic
• 2. Endothermic
• 3. Autocatalytic
• 4. Catalytic

Question: Nitrogen content in ammonium sulphate (a fertiliser) is around ______________ percent?

• 1. 5
• 2. 20
• 3. 50
• 4. 65

Question: Flushing liquor used for cooling coke oven gas constitutes of __________________?

• 1. Ammoniacal liquor
• 2. K2CO3 solution
• 3. Dilute H2SO4
• 4. Dilute HCl

Question: Which of the following is not a mixed fertiliser ?

• 1. Nitrophosphate
• 2. Calcium ammonium nitrate (CAN)
• 3. Ammonium phosphate
• 4. None of these

Question: Leaching of phosphate rock by strong ____________ acid produces phosphoric acid ?

• 1. Sulphuric
• 2. Hydrochloric
• 3. Either A or B
• 4. Neither A nor B

Question: Raw materials required for the production of CAN (Calcium ammonium nitrate) is NH3__________________?

• 1. HNO3 & limestone
• 2. CO2 & H2SO4
• 3. HNO3 & NH4Cl
• 4. CO2 & KNO3

Question: A nitrogenous fertiliser contains 20% N2. It could be_________________?

• 1. Ammonium nitrate
• 2. Calcium ammonium nitrate (CAN)
• 3. Urea
• 4. Ammonium chloride

Question: Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition _______________?

• 1. Electrolysis of water
• 2. Cryogenic removal of H2 from coke oven gas
• 3. Steam reforming of naphtha
• 4. Natural gas cracking

Question: Chemical formula of meta-phosphoric acid is ___________________?

• 1. H3PO4
• 2. H4P2O7
• 3. HPO3
• 4. Same as that of Pyrophosphoric acid