Redox Reactions
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New answer posted
4 months agoContributor-Level 10
This is a Short Answers Type Questions as classified in NCERT Exemplar
Scientists working in the Antarctica region reported that depletion of the ozone layer is commonly termed as an ozone hole over the South Pole in the Antarctic region. It was observed that a unique set of conditions were responsible for the ozone hole. In summer, nitrogen dioxide and methane react with chlorine monoxide and chlorine atoms forming chlorine sinks, preventing much ozone depletion, whereas in winter, special types of clouds called polar stratospheric clouds are formed over Antarctica. These polar stratospheric clouds provide a surface on whic
OH (g) + Cl (g)
2Cl (g)New answer posted
4 months agoContributor-Level 10
This is a Short Answers Type Questions as classified in NCERT Exemplar
Ozone is found to be thermodynamically unstable and undergoes decomposition into molecular oxygen and a dynamic equilibrium exists between the production and decomposition of ozone. The reactions involved can be shown as-
O2 (g) 
O (g) + O (g)
O (g) + O2 (g) +M
O3 (g) + M
New answer posted
4 months ago
Contributor-Level 10
This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
Option (ii) is the correct answer.
A redox couple is defined as pair of compounds or elements having together the oxidised and reduced forms of it and taking part in an oxidation or reduction half reaction.
New answer posted
4 months agoContributor-Level 10
This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
Option (i) is the correct answer.
Here the oxygen of peroxide, which is present in -1 state, is converted to zero oxidation state in O2 undergoing oxidation and decreases to -2 oxidation state in H2O undergoing reduction
New answer posted
4 months agoContributor-Level 10
This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
Option (iii) is the correct answer
As permanganate ion changes to MnO2
New answer posted
4 months agoContributor-Level 10
This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
Option (i) is the correct answer.
Fluorine is most electronegative element that is why it is best oxidant among halogens
New answer posted
4 months agoContributor-Level 10
This is a Matching Type Questions as classified in NCERT Exemplar
(i) → (e); (ii) → (d); (iii) → (c); (iv) → (b); (v) → (f).
New answer posted
4 months ago
Contributor-Level 10
This is a Matching Type Questions as classified in NCERT Exemplar
(i) → (d); (ii) → (e); (iii) → (c); (iv) → (a)
New answer posted
4 months agoContributor-Level 10
This is a Multiple Choice Questions as classified in NCERT Exemplar
Option (i) and (ii) are the correct answers.
The ones which will act as anodes when connected to standard hydrogen electrode as they have more negative standard reduction potential as compared to standard hydrogen electrode. The one which will act as cathodes when connected to standard hydrogen electrode as they have more positive standard reduction potential as compared to standard hydrogen electroDE
New answer posted
4 months agoContributor-Level 10
This is a Multiple Choice Questions as classified in NCERT Exemplar
Hence, option (iii) and (iv) are the correct answers.
The given reaction is as below-
P4+3OH- +3H2O→PH3 + 3H2PO2-
The above reaction is a kind of disproportionate reaction in which phosphorous is being reduced as well as oxidized whereas hydrogen remains same in +1 oxidation state.
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