Advertisements
Advertisements
प्रश्न
Explain why NH3 is basic while BiH3 is only feebly basic.
Advertisements
उत्तर १
Nitrogen has a small size, due to which the lone pair of electrons is concentrated in a small region. This means that the charge density per unit volume is high. On moving down a group, the size of the central atom increases, and the charge gets distributed over a large area, decreasing the electron density. Hence, the electron-donating capacity of group 15 element hydrides decreases on moving down the group.
उत्तर २
- NH3 is more basic than BiH3, in spite of the fact that both N in NH3 and Bi in BiH3 contain a single pair of electrons, should operate as Lewis bases, and should have similar basic strengths.
- The reason for this is that the N atom is smaller (70 pm) than the Bi atom (148 pm).
- The N atom in NH3 has a significantly greater electron density than the Bi atom in BiH3 because of its smaller size.
- Because of this, NH3 is more basic and more effective at donating a single pair of electrons.
संबंधित प्रश्न
Write balanced chemical equations for action of potassium permanganate on: Hydrogen
What is the covalence of nitrogen in N2O5?
Bond angle in `PH_(4)^(+)` is higher than that in PH3. Why?
How is nitrogen prepared in the laboratory? Write the chemical equations of the reactions involved.
Which of the following is a basic oxide?
(A) SiO2
(B) P4O10
(C) MgO
(D) Al2O3
Explain why Mn2+ ion is more stable than Mn3+? (Given : Mn→ Z=25)
Nitrogen is relatively inactive element because ____________.
Pick out the wrong statement.
Among the 15th group elements, as we move from nitrogen to bismuth, the pentavalency becomes less pronounced and trivalency becomes more pronounced due to:
Which of the following oxides is neutral?
Which of the following oxides of nitrogen reacts with FeSO4 to form a dark brown compound?
A deep brown gas is formed by mixing two colourless gases which are:
The laughing gas is ____________.
Which of the following elements can be involved in pπ – dπ bonding?
On heating lead nitrate forms oxides of nitrogen and lead. The oxides formed are ______.
HCl is added to following oxides. Which one would give H2O2
Which oxide of nitrogen is obtained on heating ammonium nitrate at 250°C?
Assertion: Nitrogen and oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen.
Reason: The reaction between nitrogen and oxygen requires high temperature.
