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?
Explain why Mn2+ ion is more stable than Mn3+? (Given : Mn→ Z=25)
Write balanced chemical equations for action of potassium permanganate on Warm conc. sulphuric acid
Tendency to show –3 oxidation state decrease from Nitrogn (N) to Bismuth (Bi).
The statement true for \[\ce{N^-_3}\] is ____________.
Pure nitrogen is prepared in the laboratory by heating a mixture of:
Which of the following oxides of nitrogen is a coloured gas?
In which one of the following oxides of nitrogen, one nitrogen atom is not directly linked to oxygen?
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?
Name three oxoacids of nitrogen. Write the disproportionation reaction of that oxoacid of nitrogen in which nitrogen is in +3 oxidation state.
Assertion: \[\ce{HNO3}\] makes iron passive.
Reason: \[\ce{HNO3}\] forms a protective layer of ferric nitrate on the surface of iron.
On heating lead (II) nitrate gives a brown gas “A”. The gas “A” on cooling changes to colourless solid “B”. Solid “B” on heating with NO changes to a blue solid ‘C’. Identify ‘A’, ‘B’ and ‘C’ and also write reactions involved and draw the structures of ‘B’ and ‘C’.
HCl is added to following oxides. Which one would give H2O2
Which oxide of nitrogen is obtained on heating ammonium nitrate at 250°C?
Heating white phosphorus with conc. NaOH solution gives mainly ______.
