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 isA. `N_(2)O_5`B. `N_2O_4`C. `NO_2`D. NO

An oxide of nitrogen exists is equilibrium with its dimer. At low temp

1.	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 isA. `N_(2)O_5`B. `N_2O_4`C. `NO_2`D. NO
Answer» 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))`

vii. The stability of dihalides of ` Si, Ge , Sn` and Pb increases steadily in the sequence :A. `GeX_(2) lt SiX_(2) lt SnX_(2) lt PbX_(2)`B. `SiX_(2) lt GeX_(2) lt PbX_(2) lt SnX_(2)`C. `SiX_(2) lt GeX_(2) lt SnX_(2) lt PbX_(2)`D. `PbX_(2) lt SnX_(2) lt GeX_(2) lt SiX_(2)`
When `H_2S` is passed through acidified `KMNO_4`, we getA. `K_(2)SO_(4)`B. `MnO_(2)`C. `KHSO_(3)`D. Sulphur
The`3ClO^(-)(aq.)to ClO_(3)^(-)(aq.)+2Cl^(-)(aq.)` is an example ofA. oxidation reactionB. disproportionationC. reduction reactionD. decomposition
The reaction: `ClO_(3)^(-) +I_(2) to IO_(3)^(-)+Cl_(2)`A. is possibleB. depends upon the state of productsC. is not possibleD. depends upon the temperature
In the reaction: `3Br_(2)+6OH^(Theta)rarr 5Br^(Theta)+BrO_(3)^(Theta)+3H_(2)O,Br_(2)` isA. is reducedB. is oxidizedC. disproportionatesD. disintegrate
`NaClO_(3)` is obtained by reacting `Cl_(2)` andA. cold dil. NaOHB. hot conc. NaOHC. cold `Na_(2)O_(2)`D. hot `Na_(2)O_(2)`
Which of the following is acidic oxides ?A. `HClSO_(4)`B. `MgO`C. `Al_(2)O_(3)`D. `CaO`
Which of the following is more acidic oxyacid ?A. `HClO_(4)`B. `HClO`C. `HClO_(3)`D. `HClO_(2)`
Oxygen orm acidic oxide withA. CaB. NaC. SD. K
Of the following, the most acidic isA. `As_(2)O_(3)`B. `P_(2)O_(3)`C. `Sb_(2)O_(3)`D. `Bl_(2)O_(3)`