The percentage of S-character in `Sp^2` hybrid orbital is----------.

Write short notes on Sp^3 hybridization.

The half life for the first order reaction is 5xx10^4 sec. What percentage of the initial reactant will react in 2 hrs.

The energies of the electron in the second and the third Bohr orbits of the hydrogen atoms are -5.42xx10^(19)J and -2.41xx10^(19)J respectively. Calculate the wavelength (in S.I. unit) of the emitted radiation, when the electron jumps from the third to the second orbit.

A copper wire is stretched so as to increase its length by 0.2% . Calculate the percentage change in the resistance of the wire.

A physical quantity P is related to four observables a, b, c and d as follows: P=( a^3b^2 )/(sqrtcd) The percentage errors of measurement in a, b, c and d are 1%,3%, 4% and 2%, respectively. What is the percentage error in/the quantity P? If the value of P calculated using the above relation turns out to be 3.763, to what value should you round off the result?

what percentage of length of a wire will increase by applying the stress of 1kg.weight/mm^(2) on it ?( Y = 10^11 N/m^2), 1 Kg Wt =9.8 N

Find the frequency of revolution of an electron in Bohr's 2nd orbit; if the radius and speed of electron in that orbit is 2.14×10^(−10) m and 1.09×10^6m/s respectively.