91. __________ is the most suitable fertiliser for paddy.
92. Ammonium phosphate is a __________ fertiliser.
93. Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the
94. Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?
95. __________ catalyst is used in the production of urea from CO2 and NH3.
96. Nitrolime is chemically known as
97. Which is the most suitable fertiliser for paddy?
98. Urea is formed only
99. Urea is represented as
100. A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.
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