Which among the following is not iso-electronic?
1) O22+
In a hydrocarbon, the mass of hydrogen to carbon is 1:3. The empirical formula of the hydrocarbon
Air is pumped into an automobile tube upto a pressure of 200 kPa in the morning when the air temp
$$A$$ and $$B$$ are two independent events. The probability that both $$A$$ and $$B$$ occur is