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The number of unpaired electrons in Mn2+ is
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
The number of waves in n x 10th Bohrs orbit are
The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
The octane number of zero is assigned to
The oil used in the froth floatation process is
The oldest rocks in the earths crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earths early life and solidified into hard rocks called
The ore which is found in abundance in India is
The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of
The oxidation number of nickel in K4 [Ni(CN)4] is
