Based on the observations of the above test tubes, as the temperature is increased, the [N204): decreases
increases
remains constant
not enough information

OPTION B) INCREASES. IS THE RIGHT ANSWER.

2 NO2 > < N2O4.

As temperature in increased, the above reaction equilibrium shifts to the left. generating a higher concentration of NO2.

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the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l