491.The brown colour of an acidified dilute solution of iodine in aqueous potassium iodide is intensified by the addition of a nitrite but is discharged by the addition of sulphite.
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492.With what neutral molecule is CIO– iso– electronic?
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493.Why is OF6 compound not known?
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494.Noble gases have very low boiling points. Why?
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495.Name the first compound of noble gases. Who isolated this compound?
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496.Give an equation in which the Xenon fluoride act as a (i) fluoride donor (ii) fluoride acceptor.