In non-cyclic photophosphorylation,the electron released by $PSI$ is accepted by ..........

Which of the following aqueous solutions will result in the maximum number of moles of metal deposited on passing the same amount of charge?

What is the $IUPAC$ name of the following compound?

$A$ vertical spring with force constant $k$ is fixed on a table. $A$ ball of mass $m$ at a height $h$ above the free upper end of the spring falls vertically on the spring so that the spring is compressed by a distance $d$. The net work done in the process is

Which of the following is an organometallic compound?

$A$ magnetic needle is kept in a non-uniform magnetic field. It experiences