Advertisements
Advertisements
प्रश्न
Why does NH3 form hydrogen bond but PH3 does not?
Advertisements
उत्तर १
Nitrogen is highly electronegative as compared to phosphorus. This causes a greater attraction of electrons towards nitrogen in NH3 than towards phosphorus in PH3. Hence, the extent of hydrogen bonding in PH3 is very less as compared to NH3.
उत्तर २
Nitrogen has an electronegativity value of 3.0, which is much higher than that of H (2.1). As a result, N-H bond is quite polar and hence NH3 undergoes intermolecular H-bonding.
Phosphorus has an electronegativity value of 2.1. Thus, the P–H bond is not polar, and hence PH3 does not undergo H-bonding.
संबंधित प्रश्न
Account for the following: Oxygen shows catenation behavior less than sulphur.
Give reasons: SO2 is reducing while TeO2 is an oxidising agent.
Write the order of thermal stability of the hydrides of Group 16 elements.
Why is H2O a liquid and H2S a gas?
Why are halogens strong oxidising agents?
Arrange the following in the order of the property indicated against set :
H2O, H2S, H2Se, H2Te − increasing acidic character.
Give reactions for the following:
O – O single bond is weaker than S – S single bond.
Give a reason for the following:
Fluorine gives only one oxide but chlorine gives a series of oxides.
Arrange the following in order of the property indicated set.
HF, HCl, HBr, HI - decreasing bond enthalpy.
The boiling points of hydrides of group 16 are in the order:
Which of the following statements are correct?
(i) \[\ce{CaF2 + H2SO4 -> CaSO4 + 2HF}\]
(ii) \[\ce{2HI + H2SO4 -> I2 + SO2 + 2H2O}\]
(iii) \[\ce{Cu + 2H2SO4 -> CuSO4 + SO2 + 2H2O}\]
(iv) \[\ce{Nacl + H2SO4 -> NaHSO4 + HCl}\]
Write a balanced chemical equation for the reaction showing catalytic oxidation of NH3 by atmospheric oxygen.
The correct order of ΔiHs among the following elements is
Which of the following compound is a peroxide?
______ is a gaseous element of group 16.
Given below are two statements:
Statement I: The boiling point of hydrides of Group 16 elements follows the order:
H2O > H2Te > H2Se > H2S
Statement II: On the basis of molecular mass, H2O is expected to have a lower boiling point than the other members of the group but due to the presence of extensive H-bonding in H2O, it has a higher boiling point.
In the light of the above statements, choose the correct answer from the options given below:
