81. Ozone layer of atmosphere absorbs:
82. Air shows the property of
83. The most abundant constituent of atmospheric air is :
84. The percentage of oxygen in air is approximately
85. The major constituent of air is
86. The percentage of Nitrogen in Air is
87. Air is said to be saturated when :
88. For extinguishing fire, we use
89. Dry powder fire extinguishers contain
90. Dry ice is the solid form of :
Read More Section(Chemistry)
Each Section contains maximum 100 MCQs question on Chemistry. To get more questions visit other sections.