P Block Elements
Get insights from 254 questions on P Block Elements, answered by students, alumni, and experts. You may also ask and answer any question you like about P Block Elements
- 254
Questions
- 0
Discussions
- 0
Active Users
- 0
Followers
Have a question about P Block Elements? Ask our experts
Keep it short & simple. Type complete word. Avoid abusive language.
Phosphorus forms several oxoacids. Out of these oxoacids phosphinic acid has strong reducing properties. Write its structure and write a reaction showing its reducing behaviour
Phosphorus forms several oxoacids. Out of these oxoacids phosphinic acid has strong reducing properties. Write its structure and write a reaction showing its reducing behaviour
This is a short answer type question as classified in NCERT Exemplar
The following reaction with silver nitrate demonstrates phosphinic acid reducing behaviour:
4AgNO3 + 2H2O + H3PO2→4Ag + 4HNO3 + H3PO4
Upvote 
Give an example to show the effect of concentration of nitric acid on the formation of oxidation products.
Give an example to show the effect of concentration of nitric acid on the formation of oxidation products.
This is a short answer type question as classified in NCERT Exemplar
When nitric acid is mixed with copper metal, it produces distinct oxidation products.
3Cu + 8HNO3 (dil.)→3Cu (NO3)2 + 2NO + 4H2O
Cu + 4HNO3 (Conc)→3Cu (NO3)2 + 2NO2 + 2H2O
Upvote Phosphorus has three allotropic forms — (i) white phosphorus (ii) red phosphorus and (iii) black phosphorus. Write the difference between white and red phosphorus since their structure and reactivity.
Phosphorus has three allotropic forms — (i) white phosphorus (ii) red phosphorus and (iii) black phosphorus. Write the difference between white and red phosphorus since their structure and reactivity.
This is a short answer type question as classified in NCERT Exemplar
The crystal structure of red phosphorus features a sophisticated network of bonding, whereas white phosphorus is made up of P4 molecules. To avoid natural combustion, white phosphorus must be stored in water, but red phosp
Upvote Nitric acid forms an oxide of nitrogen on reaction with P4O10. Write the reaction involved. Also write the resonating structures of the oxide of nitrogen formed.
Nitric acid forms an oxide of nitrogen on reaction with P4O10. Write the reaction involved. Also write the resonating structures of the oxide of nitrogen formed.
This is a short answer type question as classified in NCERT Exemplar
On interaction with P4O10 forms an oxide of nitrogen, N2O5, and metaphosphoric acid, 3, nitric acid is formed. HPO3
HNO3 + P4O10→4HPO3 + 2N2O5
Upvote Name three oxoacids of nitrogen. Write the disproportionation reaction of that oxoacid of nitrogen in which nitrogen is in +3 oxidation state.
Name three oxoacids of nitrogen. Write the disproportionation reaction of that oxoacid of nitrogen in which nitrogen is in +3 oxidation state.
This is a short answer type question as classified in NCERT Exemplar
Three oxoacids are
(a) HNO2, Nitrous acid
(b) HNO3, Nitric acid
(c) Hyponitrous acid, H2N2O2
3HNO2
+ H2O + 2NO
Upvote White phosphorus reacts with chlorine and the product hydrolyses in the presence of water. Calculate the mass of HCl obtained by the hydrolysis of the product formed by the reaction of 62 g of white phosphorus with chlorine in the presence of water
White phosphorus reacts with chlorine and the product hydrolyses in the presence of water. Calculate the mass of HCl obtained by the hydrolysis of the product formed by the reaction of 62 g of white phosphorus with chlorine in the presence of water
This is a short answer type question as classified in NCERT Exemplar
P4+6Cl2→4PCl3… (i)
PCl3+3H2O→H3PO3+3HCl ×4
On adding eq. (i) and (ii)
P4+6Cl2+12H2O→4H3PO3+12HCl
1 mol of white phosphorus produces 12 mol of HCl
62 g of white phosphorus has been taken which
Upvote P4O6 reacts with water according to equation P4O6 + 6H2O→ 4H3PO3. Calculate the volume of 0.1 M NaOH solution required to neutralise the acid formed by dissolving 1.1 g of P4O6 in H2O.
P4O6 reacts with water according to equation P4O6 + 6H2O→ 4H3PO3. Calculate the volume of 0.1 M NaOH solution required to neutralise the acid formed by dissolving 1.1 g of P4O6 in H2O.
This is a short answer type question as classified in NCERT Exemplar
P4O6 + 6H2O→4H3PO3 (i)
Next is neutralization
4 times H3PO3 + 2NaOH→Na2HPO3 + 2H2O (ii)
On addition of 2 equations
P4O6+8NaOH→4Na2HPO3+2H2O
P4O6 ( mol.mass )= (4×31+16×6)=220
Number of moles of P4O6&nb
Upvote Explain why ozone is thermodynamically less stable than oxygen?
Explain why ozone is thermodynamically less stable than oxygen?
This is a short answer type question as classified in NCERT Exemplar
Due its disintegration into oxygen results in the release of heat ΔH is negative) and an increase in entropy (ΔS is positive), ozone is thermodynamically unstable in comparison to oxygen. These two reactions combine t
Upvote Explain why the stability of oxoacids of chlorine increases in the order given below:
HClO < HClO2 < HClO3 < HClO4
Explain why the stability of oxoacids of chlorine increases in the order given below:
HClO < HClO2 < HClO3 < HClO4
This is a short answer type question as classified in NCERT Exemplar
Oxygen is more electronegative than chlorine, the negative charge on chlorine disperses from ClO− to ClO4− ion as the number of oxygen atoms linked to chlorine grows. As a result, ion stability will improve in the fol
Upvote In the ring test of NO3- ion, Fe2+ ion reduces nitrate ion to nitric oxide, which combines with Fe2 + (aq) ion to form brown complex. Write the reactions involved in the formation of brown rings.
In the ring test of NO3- ion, Fe2+ ion reduces nitrate ion to nitric oxide, which combines with Fe2 + (aq) ion to form brown complex. Write the reactions involved in the formation of brown rings.
This is a short answer type question as classified in NCERT Exemplar
NO3− + 3Fe2+ + 4H+→ NO+ + 3Fe3+ + 2H2O
[Fe (H2O)6]2+ + NO → [Fe (H2O)5 (NO)]2+ + H2O ( brown ring )
Upvote