JEE (Advanced) 2008 Paper-1
In a mixture of $$H - He^+$$ gas ($$He^+$$ is singly ionized He atom), H atoms and $$He^+$$ ions are excited to their respective first excited states. Subsequently, H atoms transfer their total excitation energy to $$He^+$$ ions (by collisions). Assume that the Bohr model of atomis exactly valid.
The wave length of light emitted in the visible region by $$He^+$$ ions after collisions with H atoms is
The ratio of the kinetic energy of the n = 2 electron for the H atom to that of $$He^{+}$$ ion is
A small block of mass M moves on frictionless surface of an inclined plane, as shown in figure. The angle of the incline suddenly changes from $$60^\circ$$ to $$30^\circ$$ at point B.
The block is initially at rest at A. Assume that collisions between the block and the incline are totally inelastic (g = 10 m/s$$^2$$)
If collision between the block and theincline is completely elastic, then the vertical (upward) component of the velocity of the block at point B, immediately after it strikes the second incline is
For the following questions answer them individually
Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of
