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Q9) Argon is discovered by .. [ CPMT 1991]




SOLUTION


Answer: (a)


Q10) XeF4 on partial hydrolysis produces [ AHMCE 1995]




SOLUTION

XeF4 + H2O → XeOF2 + HF
Answer: (b)


Q11) Which of the following noble gas is least polarisable? [ DPMT 1994]



SOLUTION

Ionization energy of He is highest
Answer:(a)



Q12) The number of lone pairs of electrons present on Xe in XeF2 is .. [ EAMCET 2001]



SOLUTION

Xe possesses three lone pair of electrons in equatorial positions of XeF2
Answer: (a)


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