Chemical Engineering — Test 171
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Question 1
Raw materials for urea production are _________________?
Question 2
Temperature and pressure in ammonia converter is_________________?
Question 3
C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about_________________?
Question 4
CaH4(PO4)2 is the chemical formula of ___________________?
Question 5
In natural gas, the C/H ratio (by weight) varies in the range of_________________?
Question 6
Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the ___________________?
Question 7
Which nutrient in fertiliser makes the plant stems stronger and increases branching ?
Question 8
Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in__________________?
Question 9
A Potassic fertiliser contains 50% K2O. It could be _________________?
Question 10
_____________ is the undesirable by-product produced in the manufacture of urea ?