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Question 17 : Lead dioxide is used as ---- anti knock dentoator gun powder bleach Question 18 : Which of the group V oxoacids is manufactured by Ostwald process? nitric acid nitrous oxide dinitrogen tetraoxide nitrogen hydroxide Question 19 : Which of the group V metals can not be obtained from its sulphide ore? lead Bismouth phosphorus Nitrogen Question 20 : Which of the following is responsible for the easy hydrolysis of lead halides ? availability of lone pair of electron in P orbital completely filled d orbitals by electron Availability of d-orbitals and low bond energy of Pb-H bond availability of lone pair of electron in d orbital
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