91. The increasing abundance of green house gases in atmosphere has led to the following effect except
92. The source of energy that causes the least global warming is
93. Which of the following fuels causes minimum environmental pollution?
94. Biofertilizers convert nitrogen to ________ .
95. The elements in the modern Periodic table are arranged according to their
96. Periodic table contains how many periods
97. Which one is the lightest element in the periodic table
98. Which one of the following is most electronegative?
99. Periodic table contains how many groups
100. Total number of elements in the Periodic table
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