Arrange the oxides of group `15` elements in decreasing order of their acidityA. `N_(2)O_(5) gt P_(2)O_(5) gt As_(2)O_(5) gt Sb_(2)O_(5) gt Bi_(2)O_(5)`B. `Bi_(2)O_(5) gt Sb_(2)O_(5) gt As_(2)O_(5) gt P_(2)O_(5) gt N_(2)O_(2)`C. `P_(2) O_(5) gt N_(2)O_(5) gt As_(2)O_(5) gt Sb_(2)O_(5) gt Bi_(2)O_(5)`D. `N_(2)O_(5) gt Bi_(2)O_(5) gt P_(2)O_(5) gt As_(2)O_(5) gt Sb_(2)O_(5)`

Arrange the oxides of group `15` elements in decreasing order of their

1.	Arrange the oxides of group `15` elements in decreasing order of their acidityA. `N_(2)O_(5) gt P_(2)O_(5) gt As_(2)O_(5) gt Sb_(2)O_(5) gt Bi_(2)O_(5)`B. `Bi_(2)O_(5) gt Sb_(2)O_(5) gt As_(2)O_(5) gt P_(2)O_(5) gt N_(2)O_(2)`C. `P_(2) O_(5) gt N_(2)O_(5) gt As_(2)O_(5) gt Sb_(2)O_(5) gt Bi_(2)O_(5)`D. `N_(2)O_(5) gt Bi_(2)O_(5) gt P_(2)O_(5) gt As_(2)O_(5) gt Sb_(2)O_(5)`
Answer» Correct Answer - A All the oxides of nitrogen (expect NO and `N_(2)O "neutral oxides")` and phosphorus are strongly acidic in nature , oxides of arsenic are weakly acidicl oxides of antimony are amphoteric and those of bismuth are weakly basic. As the the size of nitrogen atom is small and it has a more strong positive field, so it interacts with water, more strongly pulling the electron pairs between O-H and thus helps in hte release of `H^(+)` ions. However, this tendency diminishes with the increases in size and therefore, decreases the acidic character or conversely increases the basic character.

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)`