A gas of hydrogen - like ion is perpendicular in such a way that ions are only in the ground state and the first excite state. A monochromatic light of wavelength `1216 Å` is absorved by the ions. The ions are lifted to higher excited state and emit emit radiation of six wavelength , some higher and some lower than the incident wavelength. Find the principal quantum number of the excited state identify the nuclear charge on the ions . Calculate the values of the maximum and minimum wavelengths.
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If the pressure of hydrogen gas is increased from 1 atm. To 100 atm, keeping the hydrogen ion concentration constant at 1 M, the reduction potential o
Correct Answer - B `E_(H_(2)//H^(+))=-(0.0591)/(1)log_(10)((sqrt(pH_(2)))/([H^(+)]))`,`H^(+)+e^(-)to(1)/(2)H_(2)`
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If `veca, vecb and vecc` are vectors such that `|veca|=3,|vecb|=4 and |vec|=5 and (veca+vecb)` is perpendicular to vecc,(vecb+vecc) is perpendicular t
Given , `(veca+vecb)=0Rightarrowveca.vecc+vecb.vecc=0` `(vecb+vecc).veca=0Rightarrowveca.vecb+vecc.veca=0` `(vecc+veca).vecb=0Rightarrowvecb.vecc+veca.vecb=0` `2(veca.vecb+vecb.vecc+vecc.veca)=0``Now, |veca+vecb+vecc|^(2)+|vecb|^(2)+|vecc|^(2)+2(veca.vecb+vecb.vecc+vecc.veca)=50` `|veca+vecb+vecc|=5sqrt2`
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Which of the followings can excite a hydrogen atom in ground state? (i) A photon having 11 eV energy (ii) A neutron having `11 eV` kinetic energy (iii
Correct Answer - An electron having `11 eV` kinetic energy.
2 Answers 2 views
A hydrogen atom in ground state is moving with a kinetic energy of 30 eV. It collides with a deuterium atom in ground state at rest. The hydrogen atom
Correct Answer - `20 eV, 13.2 eV`
2 Answers 1 views
A parallel beam, of light of wavelength 100 nm passed through a sample of atomic hydrogen gas in ground state. (a) Assume that when a phton supplies s
Correct Answer - `[(a) 100nm, 560 nm, 3880 m; (b) 103nm, 121 nm, 654 nm]`
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A hydrogen like gas emits radiation of wavelengths `460 Å, 828 Å` and `1035Å`, only. Assume thar the atoms have only two excited states and the differ
Correct Answer - `[-27.2eV, -12 eV]`
2 Answers 1 views
The minimum kinetic energy of a ground state hydrogen atom required to have head-on collision with another ground state hydrogen atom but at rest to p
Correct Answer - 20.4 eV
2 Answers 2 views
A ball is projected from ground in such a way that after 10 seconds of projection it lands on ground 500 m away from the point of projection. Find out
Correct Answer - (i)`theta=45^(@)` (ii)`50sqrt(2)m//s` (iii)`50m//sec`
2 Answers 10 views
The length of the perpendicular segment from the origin to a line is 2 units and the inclination of this perpendicular is `alpha` such that sin `alpha
Correct Answer - `2sqrt2x+y=0`
2 Answers 1 views
A ladder is placd in such a way that its foot is a distance of 15 m from a wall and its top reaches a window 20m abvoe the ground. Find the leng of th
Correct Answer - 25 m
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