An oxide of nitrogen exists is equilibrium with its dimer. At low temperature, the oxide exists almost entirely as the pale yellow solid. As temperatu
An oxide of nitrogen exists is equilibrium with its dimer. At low temperature, the oxide exists almost entirely as the pale yellow solid. As temperature is increased, the colour darkens, the dissociation is complete at `150^@C` and the colour of gaseous matter becomes black. Further increase in temperature results in a loss of colour. The oxide of nitrogen is
A. `N_(2)O_5`
B. `N_2O_4`
C. `NO_2`
D. NO
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Correct Answer - C
`underset(("Pale yellow solid"))(N_(2)O_(4)) underset("Cool")overset("Heat")Leftrightarrow 2NO_(2) overset("Heat")Leftrightarrow underset(("Brown or black"))(2NO+O_(2))`
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