Advertisements
Advertisements
प्रश्न
Explain why inspite of nearly the same electronegativity, oxygen forms hydrogen bonding while chlorine does not.
Advertisements
उत्तर १
- Both nitrogen (N) and chlorine (Cl) have an electronegativity of 3.0.
- However, only nitrogen is involved in the hydrogen bonds (e.g., NH3) and not chlorine.
- This is due to the smaller atomic size of nitrogen (atomic radius = 70 pm) as compared to chlorine (atomic radius = 99 pm), therefore, N can cause greater polarisation of N-H bond than Cl in the case of Cl-H bond.
- Consequently, the N atom is involved in hydrogen bonding and not chlorine.
उत्तर २
Despite having almost identical electronegativity values, O and Cl have very different atomic sizes (O = 66 pm, Cl = 99 pm). Because of this, the electron density of the O atom is significantly higher than that of the Cl atom. As a result, although chlorine cannot form hydrogen bonds, oxygen can.
संबंधित प्रश्न
Give reasons: SO2 is reducing while TeO2 is an oxidising agent.
Account for the following : There is large difference between the melting and boiling points of oxygen and sulphur.
Give reasons for the following : H2Te is the strongest reducing agent amongst all the hydrides of Group 16 elements.
Give reasons for the following : Oxygen has less electron gain enthalpy with negative sign than sulphur.
List the important sources of sulphur.
Why does NH3 form hydrogen bond but PH3 does not?
Why are halogens strong oxidising agents?
Give reasons Thermal stability decreases from H2O to H2Te.
Draw the structures of `H_3PO_2`
Explain the following properties of group 16 elements :
1) Electro negativity
2) Melting and boiling points
3) Metallic character
4) Allotropy
The boiling points of hydrides of group 16 are in the order:
Match the items of Columns I and II and mark the correct option.
| Column I | Column II |
| (A) \[\ce{H2SO4}\] | (1) Highest electron gain enthalpy |
| (B) \[\ce{CCl3NO2}\] | (2) Chalcogen |
| (C) \[\ce{Cl2}\] | (3) Tear gas |
| (D) Sulphur | (4) Storage batteries |
Strong reducing behaviour of \[\ce{H3PO2}\] is due to ______.
Write a balanced chemical equation for the reaction showing catalytic oxidation of NH3 by atmospheric oxygen.
Which of the following compound is a peroxide?
What is the basicity of \[\ce{H3PO4}\]?
______ is a radioactive element in group 16 elements.
______ is a gaseous element of group 16.
