261 Splitting of spectral lines when atoms are subjected to strong electric filed is called_________________? Chemistry Medium Full question → A Zeeman effect B Stark effect C Photoelectric effect D Compton effect
262 When electron jump into orbit 1 then series obtained is___________________? Chemistry Medium Full question → A Lyman B Paschen C Pfund D Brackett
263 Spectrum is produced due to________________? Chemistry Medium Full question → A Different wavelength B Different colours C Different intensities D all have little contribution
264 Milikan used ______________ in his atomizer? Chemistry Medium Full question → A Milk B Honey C Oil D Water
265 Electronic configuration of K is_________________? Chemistry Medium Full question → A [Ar]4s2 B [Ar]4s1 C [Kr]5s1 D [He]2s1
266 Space around nucleus where finding probability of electrons is maximum is called ____________________? Chemistry Medium Full question → A Orbital B Orbit is elliptical C subshell D Electron cloud
267 Atom with higher atomic number produces X-rays of__________________? Chemistry Medium Full question → A Shorter wavelength B Larger wavelength C X-ray not produced D All are possible
268 When electrons collide with heavy metals than ___________ are produced? Chemistry Medium Full question → A Beta-rays B Alpha-rays C X-rays D Gamma-rays
269 Atomic orbits having same energy are called________________? Chemistry Medium Full question → A Degenerate orbitals B Bonding molecular orbitals C Anti bonding molecular orbitals D Half filled orbitals
270 The correct electronic configuration of Cu is ___________________? Chemistry Medium Full question → A [Ar]4s1 B [Ar]4s2 C [Ar]3d104s1 D [Ar]3d94s2
271 2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ? Chemistry Medium Full question → A 2-times B 3-times C 4-times D 6 times
272 Planks theory says energy is emitted__________________? Chemistry Medium Full question → A In continuous manner B Discontinuous manner C Simultaneously D In the form of heat
273 The value of e/m ratio of electron is________________? Chemistry Medium Full question → A 6.02 x 1023 C/kg B 1.7588 x 1020 C/kg C 9.1095 x 10-31 C/kg D 1.7588 x 1011 C/kg
274 Positive rays give flash on________________? Chemistry Medium Full question → A AgNO3 plate B AgCl plate C ZnO D ZnS
275 Angle of deflection was studied by________________? Chemistry Medium Full question → A Hitorff B Stoney C William Crookes D J.Perrin
276 Pressure in gas discharge tube was kept________________? Chemistry Medium Full question → A 10 torr B 1 torr C 0.1 torr D 0.01 torr
277 Which one of the following explain the shape of orbitals _________________? Chemistry Medium Full question → A Principal of quantum number B Azimuthal quantum number C Magnetic quantum number D Spin quantum number
278 Splitting of spectral lines when atom is subjected to magnetic field is called _______________? Chemistry Medium Full question → A Zeemans effect B Starks effect C Photo electric effect D Compton effect
279 Rutherfords planet like structure was defective and unsatisfactory because_________________? Chemistry Medium Full question → A Moving e- accelerate towards the nucleus B Continuous spectrum C behavior of electron remain unexplained D all
280 Which one is not true about cathode rays ? Chemistry Medium Full question → A 9.11×10-31 Kg B Cast shadow C Heat up the platinum foil D Cannot ionize