Which of the statements given below is incorrect?
1. \(\mathrm{C l_{2} O_{7 }}\)is an anhydride of perchloric acid
2. \(\mathrm{O_{3}}\) molecule is bent
3. ONF is isoelectronic with \(\mathrm{N O_{2}^{-}}\)
4. \(\mathrm{O F_{2}}\) is an oxide of fluorine
The variation of the boiling point of the hydrogen halides is in the order HF > HI > HBr > HCl.
The higher boiling point of hydrogen fluoride is explained as:
1. | The electronegativity of flourine is much higher than other elements in group |
2. | There is strong hydrogen bonding between HF molecules |
3. | The bond energy of HF molecules is greater than in other hydrogen halides |
4. | The effect of nuclear shielding is much reduced in flourine which polarizes the HF molecule |
The given sequence among the following arrangements that is not strictly according to the property indicated against it.
1. | \(\small{\text{increasing} \ p K_{a}\ \text{values}}\) | H2O < H2S < H2Se < H2Te :
2. | \(\small{\mathrm{N H_{3} < P H_{3} < A s H_{3} < S b H_{3}} : \text{increasing acidic character}}\) |
3. | \(\small{\mathrm{C O_{} < S i O_{} < S n O_{} < P b O_{2}} : \text{increasing oxidising power}} \) |
4. | \(\small{\mathrm{H F < H C l < H B r < H I} : \text{increasing acidic strength}} \) |
Which of the following compounds has the lowest melting point?
1.
2.
3.
4.
Among the following which is the strongest oxidising agent?
1.
2.
3.
4.