P Block Elements
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In reaction with Cl2 , phosphorus forms two types of halides ‘A’ and ‘B’. Halide A is yellowish-white powder but halide ‘B’ is colourless oily liquid. Identify A and B and write the formulas of their hydrolysis products.
In reaction with Cl2 , phosphorus forms two types of halides ‘A’ and ‘B’. Halide A is yellowish-white powder but halide ‘B’ is colourless oily liquid. Identify A and B and write the formulas of their hydrolysis products.
This is a short answer type question as classified in NCERT Exemplar
A is PCl5 (yellowish white powder)
P4 + 10Cl2→4PCl5
B is PCl3 (colourless oily liquid)
Hydrolysis of the following product
PCl3+3H2O→H3PO3+3HCl
PCl5+4H2O→H3PO4+5HCl
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This is a short answer type question as classified in NCERT Exemplar
Six F atoms can be accommodated around sulphur due to fluorine's tiny size, however the chloride ion is comparably bigger, resulting in interatomic repulsion.
Upvote <p><strong>SF<sub>6</sub> is known but SCl<sub>6</sub> is not. Why?</strong></p>
Out of H2O and H2S, which one has higher bond angle and why?
Out of H2O and H2S, which one has higher bond angle and why?
This is a short answer type question as classified in NCERT Exemplar
Oxygen is more electronegative than sulphur, the bond angle of H2O is greater, and the bod pair electron of an OH bond will be closer to oxygen, causing bond-pair repulsion between bond pairs of two OH bonds
Upvote Give reason to explain why ClF3 exists but FCl3 does not exist.
Give reason to explain why ClF3 exists but FCl3 does not exist.
This is a short answer type question as classified in NCERT Exemplar
Chlorine has vacant d-orbitals, which become excited upon bonding when electrons from the 3p-orbital are promoted to the 3d-orbital, giving it a covalency of three.
Due to the lack of unoccupied d-orbitals in the second energy shell,
Upvote Why is nitric oxide paramagnetic in gaseous state but the solid obtained on cooling it is diamagnetic?
Why is nitric oxide paramagnetic in gaseous state but the solid obtained on cooling it is diamagnetic?
This is a short answer type question as classified in NCERT Exemplar
NO2 exists as a monomer with one unpaired electron in the gaseous state, but it dimerises to N2O4 in the solid state, leaving no unpaired electron, making the solid form diamagnetic.
Upvote In PCl5 , phosphorus is in sp3d hybridised state but all its five bonds are not equivalent. Justify your answer with reason.
In PCl5 , phosphorus is in sp3d hybridised state but all its five bonds are not equivalent. Justify your answer with reason.
This is a short answer type question as classified in NCERT Exemplar
Three P—Cl bonds are arranged in one plane at a 1200 angle. These bonds are known as equatorial bonds because they are formed between two points. The remaining two P—Cl bonds, one above the equatorial plane and the other b
Upvote PH3 forms bubbles when passed slowly in water but NH3 dissolves. Explain why?
PH3 forms bubbles when passed slowly in water but NH3 dissolves. Explain why?
This is a short answer type question as classified in NCERT Exemplar
PH3 is insoluble in water and cannot create hydrogen bonds with it, it forms bubbles, whereas NH3 dissolves because it is soluble in water and can form hydrogen bonds with it.
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Upvote Write a balanced chemical equation for the reaction showing catalytic oxidation of NH3 by atmospheric oxygen.
Write a balanced chemical equation for the reaction showing catalytic oxidation of NH3 by atmospheric oxygen.
This is a short answer type question as classified in NCERT Exemplar
4NH3 + 5O2 
4NO + 6H2O
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