What is the solubility of gas in water at $$25^{\circ} \mathrm{C}$$ if partial pressure is 0.346 bar [Henry's law constant is $$[0.159 \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~bar}^{-1}]$$ ?

Which from following coloured light has the highest energy?

Which among the following is haloalkyne?

Which element from the following possesses half-filled d-orbitals either in expected or in observed electronic configuration?