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show how so2 bleaching temporary but cl2 bleach permanently?
how to find the bond order in NO2- and NO3- . pls explain.
why nitrogen exist as a gas and phosphorus exist a solid?
write the reaction of SO2 with acidified KMnO4 and write the product formed.
Chromyl Chloride test is not given by chlorides of mercury, tin, silver lead and antimony. Wny?
What are p-pi - p-pi , p-pi - d-pi and d-pi - d-pi bonds??
NCl3 and PCl3 gives different product on hydrolysis. why?
Why does ICl is more reactive than I2?
Why is NO paramagnetic in gaseous state but diamagnetic in solid and liquid state?
Explain the trend
NCl3> PCl3 > AsCl3 > SbCl3 > BiCl3..on the account of d hydrolysis..
thkyu for ny help..!! :))
why so2 can act as both oxidizing as well as reducing agent?
F2 is stronger oxidizing agent than cl2
How to balance the chemical equation:
NaOH (hot and conc.) + Cl2 -------> NaCl + NaClO3+H2O
Ka2 is very less than Ka1 for H2SO4 in water..y?
The relative stabilities of N2, N2+ and N2- are
1. N2> N2+=N2-
2. N2= N2+>N2-
3. N2< N2+=N2-
4. N2= N2+<N2-
what is covalecy? what is covalency of n2o5
Electron gain enthalpy of oxygen is less than sulphur's due to its compact nature (it will suffer interelectronic repulsion), but why does EGE become less negative after sulphur ? (Down the group, atomic size increases, so how can size be attributed to EGE in this case?) if it is not size, then what is the deciding factor?
The perhalate ion with maximum oxidising power is
d. all have nearly same oxidising power
why does iron dissolve in HCL to form FeCl2 and not FeCl3
h3po3 is diprotic acid
XeF2 has a straight linear structure and not a bend angular structure. give reasons
why is NH3 is a stronger base than PH3
Why out of all the noble gases, only Xenon can form compounds?
(The answer is not because its 1st IE is similar to that of oxygen)
My Chemistry practicals and Viva are on 4/2/13 and 5/2/13.Please provide some help on how to prepare for them because they are also very important.
what is meant by reducing character and oxidising character? what is oxidising agent and reducing agent?
2. How is XeO3 prepared? Reprsent with the chemical equations.
the N-O bond in NO2- is shorter than the N-O bond NO3-. State the reason.
The number of electrons involved in the reduction of nitrate ion to hydrazine is
why is helium used in diving apparatus?
Nitrogen does not form pentahalides due to non-availability of thed-orbitals in its valence shell plz explain
NCl3 get hydrolysed whereas NF3 not
NF3 IS AN EXOTHERMIC COMPOUND WHEREAS NCl3 IS NOT WHY???
nh3 is good complexing agent
as the ratio between radii of X & Y increases,number of atoms per molecule also increases.why?? here, Y is a halogen of smaller size and X is a halogen of larger size!
SF6 is not easily hydrolysed whereas SF4 is easily hydrolysed...why...???
THE MOLECULES NH3 AND NF3 HAVE DIPOLE MOMENTS WHICH ARE OF OPPOSITE DIRECTION
Why does reducing property of dioxide decreases from SO2 to TeO2 and SO2 is reducing while TeO2 is an oxidisng agent.
An orange solid A on heating gives colourless gas B.the gas B is in dry condition is passed over heated Ca to give a solid C.the solid C further reacts with water to produce gas D which forms a blue coloured compund E on reaction with copper sulphate solution. identify A,B,C,D,and E.
what is holmes signal
PH3 has lower boiling point than NH3.explain.
why aniline does not under go friedel crafts rxn????
why pcl5 is more covalent then pcl3 ?
why do noble gas form compounds with oxygen and flourine only?
OF2 should be called as oxygen difluoride and not flourine oxide?
Why is BiH3 the strongest reducing agent amongst all the hydrides of group 15 elements?
complete the reaction
why are pentahalides more covalent than trihalides?
why does acidic character decrease down the group?
structure of H2S2O3 ,H2S2O4, H2S2O5, H2S2O6, H2S3O6, H2S4O6, H2S506
what is p pie p pie and d pie p pie bond?
hw 2 determine the basicity of-H3PO3 and H3PO4
Why iodine is more soluble in potassium iodide than in water?
All the bonds in SF4 are not equivalent. Why ?
Nitrogen forms N2 but phosphorus forms P4 at room temerature. Why?
Among the halogen F2 is the strongest oxidising agent .Why?
why stability of halides decreases down the group?
H3PO2 and H3PO3 act as good reducing agents while H3PO4 does not.
"SF6 is exceptioanlly stable for steric reason " !!! ( but all hexafluorides of group 16 elements are stable na??? then why NCERT have used the word EXCEPTIONALLY ??? ) kindly help !!!!
why is H2S is less acidic than H2Te?
Trihalides of Nitrogen are lewis bases
Trihalides of P , Sb , As , Bi are lewis acids?
Explain the trend :
i)NF3 < NCl3 < NBr3 < NI3 ..in accordance with Lewis Base Strength
ii) PF3 > PCl3 > PBr3 > PI3 ...in accordance with the Lewis Acid Strength
what i meant by ppi ppi ' dpi dpi and dpi ppi bond....???pls xplain
why dissociation energy of f2(bond length 143pm) is less than cl2(bond length 199pm) and br2( bond length 228 pm), even when it's bond length is less? please answer fast (the reason of interelectronic repulsion don't convince me because if there is an inter electronic repulsion than why it's bond length is less)
why SF6 exists but OF6 does not?
why nitrogen has more ionistaion enthalpy than oxygen???
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