Thursday, August 6, 2020
Why white phosphorous is stored under water?
White phosphorous is very reactive and will spontaneously inflame in
air so it is stored under water.
Related
Questions:
Which is more basic N(CH3)3 or N(SiH3)3 , explain?
Are all the five bonds of PCl5 equivalent? Justify your
answer.
Trisilyl amine, N(SiH3)3 is planar whereas trimethyl
amines N(CH3)3 is pyramidal. Explain why?.
What are common structural features of oxides (P4O6 and
P4O5) of phosphorous?
What are the structural difference between oxides ( P4O6
and P4O10) of phosphorous?
What are abnormal behaviour of Nitrogen atom as compared
to other family members?
What is product obtained when N2O5 is treated with NaCl?
What is metaphophoric (HPO3)?
Phosphorus can form PCl5 but nitrogen can not form NCl5
why?
Why PCl3 hydrolysed while NCl3 can not be hydrolysed?
Why bond angle of hydrides of group 15, decreases down
the group?
What is "calgon" ? Give structure and its uses?
Why nitrogen shows catenation properties less than
phosphorus?
Why Nitrogen is fairly inert gas?
Why Nitrogen (N2) is less reactive at room temperature?
Why Nitrogen dioxide (NO2) dimerises to form Dinitrogen
tetraoxide (N2O4)?
Why Nitrogen dioxide (NO2) is coloured but Dinitrogen
tetraoxide (N2O4) is colourless?
Which allotrope of phosphorous is used on top head of match stick?
Red Phosphorous is used on top head of match stick.
Related
Questions:
Which is more basic N(CH3)3 or N(SiH3)3 , explain?
Are all the five bonds of PCl5 equivalent? Justify your
answer.
Trisilyl amine, N(SiH3)3 is planar whereas trimethyl
amines N(CH3)3 is pyramidal. Explain why?.
What are common structural features of oxides (P4O6 and
P4O5) of phosphorous?
What are the structural difference between oxides ( P4O6
and P4O10) of phosphorous?
What are abnormal behaviour of Nitrogen atom as compared
to other family members?
What is product obtained when N2O5 is treated with NaCl?
What is metaphophoric (HPO3)?
Phosphorus can form PCl5 but nitrogen can not form NCl5
why?
Why PCl3 hydrolysed while NCl3 can not be hydrolysed?
Why bond angle of hydrides of group 15, decreases down
the group?
What is "calgon" ? Give structure and its uses?
Why nitrogen shows catenation properties less than
phosphorus?
Why Nitrogen is fairly inert gas?
Why Nitrogen (N2) is less reactive at room temperature?
Why Nitrogen dioxide (NO2) dimerises to form Dinitrogen
tetraoxide (N2O4)?
Why Nitrogen dioxide (NO2) is coloured but Dinitrogen
tetraoxide (N2O4) is colourless?
Hypophosphorous acid (H3PO2)
and Phosphorous acid (H3PO3) act as as good reducing agents while H3PO4 does
not.Why?Why the first ionization energy of group 15 elements much higher than those of corresponding group 14 elements?
The
first ionization energy of group 15 elements much higher than those of
corresponding group 14 elements this is due to increase in nuclear charge and
extra stable configuration of the elements of this group. The extra stability
of configuration is attributed to the exactly half filled p – orbitals in their
valence shells.
Related
Questions:
Which is more basic N(CH3)3 or N(SiH3)3 , explain?
Are all the five bonds of PCl5 equivalent? Justify your
answer.
Trisilyl amine, N(SiH3)3 is planar whereas trimethyl
amines N(CH3)3 is pyramidal. Explain why?.
What are common structural features of oxides (P4O6 and
P4O5) of phosphorous?
What are the structural difference between oxides ( P4O6
and P4O10) of phosphorous?
What are abnormal behaviour of Nitrogen atom as compared
to other family members?
What is product obtained when N2O5 is treated with NaCl?
What is metaphophoric (HPO3)?
Phosphorus can form PCl5 but nitrogen can not form NCl5
why?
Why PCl3 hydrolysed while NCl3 can not be hydrolysed?
Why bond angle of hydrides of group 15, decreases down
the group?
What is "calgon" ? Give structure and its uses?
Why nitrogen shows catenation properties less than
phosphorus?
Why Nitrogen is fairly inert gas?
Why Nitrogen (N2) is less reactive at room temperature?
Why Nitrogen dioxide (NO2) dimerises to form Dinitrogen
tetraoxide (N2O4)?
Why Nitrogen dioxide (NO2) is coloured but Dinitrogen
tetraoxide (N2O4) is colourless?
Wednesday, July 22, 2020
Metallurgy- Extraction of elements, and purification methods:
METALLURGY-INTRODUCTION:
PYROMETALLURGY:
How to determine Basic order of different amines and it derivatives ?
- How is base strength related to the availabihty of the electron-pair?
- Amines are more basic than ammonia why?
- What is relative basic strength order 1° amines , 2°amines and 3° amines ? Explain:
- Give an explanation for the fact that Guanidine NH=C(CH3)2 is a stronger base than most of amines?
- Arrange in correct order of basic Character of aniline, pyrrol, pyridine and piperidine?
- What is correct basicity order of pyridine, pyridazine, pyrimidine and pyrazine ?
- Give an explanation for the fact that Guanidine NH=C(CH3)2 is a stronger base than most of amines?
- Arrange in correct order of basic Character of aniline, pyrrol, pyridine and piperidine?
- What is correct basicity order of pyridine, pyridazine, pyrimidine and pyrazine ?
- Why pyridine is more basic than Pyrrole?
- Why pyrimidine is less basic than pyridine?
- Imidazole is more basic than pyridine? Why?
- Biological Important of Imidazole and structure:
- Pyridine is almost 1 million times less basic than piperidine? Why?
- Cyclohexylamine amine is the stronger base than Aniline? Why?
- Tetrahydroquinoline amine is the stronger base than Tetrahydroisoquinoline? Why?
- Arrange the following in the order of increasing basicity : p-Toluidine, N, N-Dimethyl-p-toluidine, p-Nitroaniline, Aniline. (I.I.T.1986)
- Arrange the following in the increasing order of their acid strength : Methyl amine, Dimethyl amine, Aniline, N-methyl aniline (I.I.T, 1988).
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