Passage - VIII : In this passage five observation are given. Question are asked with reference to the givenobservations Observation (i) Gaseousoxygen is colourless whereas liquid and solid oxygen are coloured substance. Observation (ii) When O_(2) is cooled below a certain temperature its paramagnetic character decreases. Observation (iii) In ice H_(2)O molecules are H bonded Observation (iv) Ozone is responsible for tailing of Hg(l) Observation (v) O_(3)(g) is almost unavailable in lower atmosphere Which of the following explain the observation (i)?

Passage - VIII : In this passage five observation are given. Question

1.	Passage - VIII : In this passage five observation are given. Question are asked with reference to the givenobservations Observation (i) Gaseousoxygen is colourless whereas liquid and solid oxygen are coloured substance. Observation (ii) When O_(2) is cooled below a certain temperature its paramagnetic character decreases. Observation (iii) In ice H_(2)O molecules are H bonded Observation (iv) Ozone is responsible for tailing of Hg(l) Observation (v) O_(3)(g) is almost unavailable in lower atmosphere Which of the following explain the observation (i)?
Answer» in liquid and solid oxygen there is a TRANSITION of bonding ELECTRONS from the TRIPLET state to the singlet state in liquid and solid oxygen there is a transition of antibonding electrons from the triplet state to the singlet state in liquid and solid oxygen the two unpaired electrons of gasesous oxygen are PAIRED up (a) and (c ) SOLUTION :`KHSO_(4)` is obtained in solid state