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प्रश्न
Arrange the following in the order of property indicated for the given set:
HF, HCl, HBr, HI - increasing acid strength.
Arrange the following according to the property mentioned against the given:
HF, HCI, HI, HBr in the order of increasing acid strength.
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उत्तर १
HF < HCl < HBr < HI
The bond dissociation energy of the H-X molecules, where X=F, Cl, Br, and I, decreases with an increase in the atomic size. Since the H-I bond is the weakest, HI is the strongest acid.
उत्तर २
The acid strength of HF, HCl, HBr and HI depends upon their bond dissociation enthalpies. Since the bond dissociation enthalpy of the H-X bond decreases from H-F to H-I as the size of the atom increases from F to I.
Thus, the acid strength order is HF < HCl < HBr < HI
The weak acidic strength of HF is also due to H-bonding, due to which the release of H+ becomes difficult.
संबंधित प्रश्न
Fluorine is a stronger oxidising agent than chlorine. Why?
Account for the following :
Acidic character increases from HF to HI.
Why are halogens coloured?
Cl2 acts as a bleaching agent.
Tincture of iodine is ____________.
Which one has the lowest boiling point?
Which is the strongest acid in the following:
Which of the following pairs of ions are isoelectronic and isostructural?
Bond dissociation enthalpy of E–H (E = element) bonds is given below. Which of the compounds will act as the strongest reducing agent?
| Compound | \[\ce{NH3}\] | \[\ce{PH3}\] | \[\ce{AsH3}\] | \[\ce{SbH3}\] |
| Δdiss (E – H)/kJ mol–1 | 389 | 322 | 297 | 255 |
In solid state \[\ce{PCl5}\] is a ______.
Give reason to explain why ClF3 exists but FCl3 does not exist.
The reaction \[\ce{3ClO- (aq) -> ClO3- (aq) + 2Cl- (aq) + 2Cl- (aq)}\] is an example of
Iodine has lowest oxidiation state in ______.
Statement I: Acid strength increases in the order given as HF << HCl << HBr << HI.
Statement II: As the size of the elements F, Cl, Br, and I increase down the group, the bond strength of HF, HCl, HBr, and HI decreases and so the acid strength increases.
In the light of the above statements, choose the correct answer from the options given below.
Statement I: Acid strength increases in the order given as HF << HCl << HBr << HI.
Statement II: As the size of the elements F, Cl, Br, and I increase down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strength increases.
In the light of the above statements, choose the correct answer from the options given below.
Write the name and formula of oxoacid of fluorine.
Give a reason for the following:
Mn+2 compounds are more stable than Fe+2 compounds.
Arrange the following in the increasing order of the property mentioned:
MF, MCl, MBr, MI (ionic character)
