In non-cyclic photophosphorylation,the electron $(e^-)$ released by $PSI$ is accepted by.......

If $\frac{x}{(x - 1)(x^2 + 1)^2} = \frac{1}{4}\left[ \frac{1}{(x - 1)} - \frac{x + 1}{x^2 + 1} \right] + y$,then $y =$

Alkali metals lose electrons from which orbitals?

Which of the following has the highest boiling point?

Which of the following reactions will not result in the formation of carbon-carbon bonds?

$A$ paramagnetic sample shows a net magnetization of $8 \ Am^{-1}$ when placed in an external magnetic field of $0.6 \ T$ at a temperature of $4 \ K$. When the same sample is placed in an external magnetic field of $0.2 \ T$ at a temperature of $16 \ K$,the magnetization will be