Which type of reaction occurs in the following equation?
2NO2(g) + 2OH"(aq) —— NO2(aq) + NO, (aq) +H2O(1)
a combination redox reaction
a displacement redox reaction
a synthetic redox reaction
a disproportionation redox reaction

A disproportionation redox reaction  

Explanation:

1. Assign an oxidation number to every atom in the equation

2. Identify the atoms that change their oxidation number

N in NO₂: +4 ⟶ +3 in NO₂⁻

N in NO₂: +4 ⟶ +5 in NO₃⁻

3. Identify the type of change

This is a disproportionation — a reaction in which one substance is simultaneously oxidized and reduced.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be