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three bonds
one bond
four bonds
two bonds
In cold countries alcohol is preferred to mercury as a thermometric liquid because
In drinking water supply, which of the following treatments is not involved
In ethane, each carbon atom is bonded to
In galvanization, iron is coated with
In known elements, the maximum number is of
In organic compounds, nitrogen is estimated by
In polluted water, the dissolved oxygen in it
In the vulcanization of rubber, the element used is
In upper layer of atmosphere ozone is formed by
In Which among the given states max. iron ore is found
