CBSE Class 12-science Answered
Two gases A and B are allotropes. A is paramagnetic and B is diamagnetic. B is a powerful oxidizing agent than A. A is converted to B by silent electrical discharge. A is colorless while B is a pale blue gas. B reacts with blackened lead paintings to make them white. B converts colorless NO gas to brown gas C and A is also formed.
Identify A,B and C and write the reactions involved.
Asked by lekhakarthikeyan | 28 Aug, 2018, 03:43: AM
1) A is an oxygen gas which is paramagnetic and B is an ozone gas which is the powerful oxidizing agent than A oxygen.
2) oxygen is converted to ozone by silent electrical discharge to avoid its decomposition.
![3 straight O subscript 2 space rightwards arrow with sunlight on top space 2 straight O subscript 3](https://images.topperlearning.com/topper/tinymce/cache/171e9fde915a18a894dd5b46a7c668ec.png)
3) ozone reacts with blackened lead paintings to make them white.
![4 straight O subscript 3 space plus space PbS space rightwards arrow 4 straight O subscript 2 space plus space PbSO subscript 4](https://images.topperlearning.com/topper/tinymce/cache/ae66c13befa365933eb45e1658ca7ff6.png)
4) Ozone (B) converts colorless NO gas to brown gas C and A is also formed.
![straight O subscript 3 space plus space NO space rightwards arrow space NO subscript 2 space plus space straight O subscript 2
straight B space space space space space space space space space space space space space space space space space space space straight C space space space space space space space space space space straight A](https://images.topperlearning.com/topper/tinymce/cache/aa5c216905fd5529f43401def7350c18.png)
Therefore,
A = Oxygen O2
B= Ozone O3
C= Nitrogen dioxide NO2
Answered by Ramandeep | 29 Aug, 2018, 11:12: AM
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