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?
oxygen electronic configuration is 1s2 2s2 2p4 It have only two orbital s and p but it do not have d- orbital. Since oxygen atom has no vacant d-orbitals, therefore, OF6 compound is 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.
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497.What happens when Xenon hexafluoride is being hydrolysed completely?
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498.How will you prepare Xenon oxy-tetrafluoride?
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499.Give the formula and describe the structure of a noble gas species which is isostructural with: (a) ICl4–, (b) IBr2–, (c) BrO3–
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