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3 billion years
100 years
0.01 minute
13 days
The formula C6H14 represents the hydrocarbon _.
The formula C6H5-CO-CH3 represents
The formula of lithium nitride is
The fundamental particles present in equal numbers in neutral atoms are
The fundamental particles present in the nucleus of an atom are
The gas causing acid rain in an industrial area is
The gas dissolved in water that makes it basic is:
The gas present in the stratosphere which filters out some of the suns ultraviolet light and provides an effective shield against radiation damage to living things is
The gas produced in marshy places due to decomposition of vegetation is
The gas that causes suffocation and death when coal or coke is burnt in a closed room is