From the following statements regarding \(\mathrm{H_2O_2}\), choose the incorrect statement :
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- It decomposes on exposure to light
- It has to be stored in plastic or wax lined glass bottles in dark
- It has to be kept away from dust
- It can act only as an oxidizing agent
The Correct Option is D
Solution and Explanation
(2) True: it is stored in plastic or wax-lined glass bottles in the dark, because alkali from ordinary glass catalyses decomposition.
(3) True: dust particles catalyse its decomposition.
(4) False: oxygen is in the -1 state, between -2 and 0, so \(\mathrm{H_2O_2}\) acts as an oxidising agent (e.g. with \(\mathrm{Fe^{2+}}\)) and also as a reducing agent (e.g. with acidified \(\mathrm{KMnO_4}\)).
Answer: (4) It can act only as an oxidizing agent
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(A) used in the treatment of effluents.
(B) used as both oxidising and reducing agents.
(C) the two hydroxyl groups lie in the same plane.
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Statement I : H\(_2\)O\(_2\) can act as both oxidising and reducing agent in basic medium.
Statement II : In the hydrogen economy, the energy is transmitted in the form of dihydrogen.
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Assertion A : The dihedral angles in \(\mathrm{H_2O_2}\) in gaseous phase is \(90.2^\circ\) and in solid phase is \(111.5^\circ\).
Reason R : The change in dihedral angle in solid and gaseous phase is due to the difference in the intermolecular forces.
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