In a mixture of `He^(o+)` gas H atom and `He^(o+)` ions Are excited to three respective first excited subsepuenly , H atom transfers its total excitation energy to `He^(o+)`ions by collision .Assuming that Bohr model of an atom is applicable , answer the following question When an electron of H jumps from a higher to lower energy state ,thereA. Its potential energy decreasesB. Its kinetic energy increasesC. Its angular momentum remain unchangedD. Wavelength of de Broglie wave associated with the electron decrease

In a mixture of `He^(o+)` gas H atom and `He^(o+)` ions Are excited to

1.	In a mixture of `He^(o+)` gas H atom and `He^(o+)` ions Are excited to three respective first excited subsepuenly , H atom transfers its total excitation energy to `He^(o+)`ions by collision .Assuming that Bohr model of an atom is applicable , answer the following question When an electron of H jumps from a higher to lower energy state ,thereA. Its potential energy decreasesB. Its kinetic energy increasesC. Its angular momentum remain unchangedD. Wavelength of de Broglie wave associated with the electron decrease
Answer» Correct Answer - A::B::C As electron from higher to orbit `En darr` hence `KREn uarr [KE = En]` Similarly `Pen darr [Pen = 2En]` Angular momentum `(L) = nh//2pi` hence `1 darr` as `n darr` `lambda_(e) = h//mv_(n)[Ken uarr ` hence Vn darr]` therefore `lambda_(n) darr`

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