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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.
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)
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?
1)bleaching of flowers by chlorine is permanent. while bu so2 its temporary.. explain.
2)all the bonds in pcl5 are not equivalent.. explain..
3)sulphur has greater tendency for catenation than oxygen.. explain
4)Zr and Hf have identical size.. explain
5)the lowest oxidation state of manganese is basic.. while the higest is acidic.. explain..
6)name one substance which acts as both.. (analgesic and antipyretic..)
why so2 can act as both oxidizing as well as reducing agent?
Pls answer it as soon as possible and also explain the reason.
hf is weaker acid than hcl
How to balance the chemical equation:
NaOH (hot and conc.) + Cl2 -------> NaCl + NaClO3+H2O
Why basicity decreases down the group ?
Basicity order: NH3 PH3 AsH3 SbH3≥ BiH3
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?
Ka2 is very less than Ka1 for H2SO4 in water..y?
why does iron dissolve in HCL to form FeCl2 and not FeCl3
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-
h3po3 is diprotic acid
oxygen does not form OF4 or OF6 whereas S forms SF4, SF6. why ?
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.
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)
what is meant by reducing character and oxidising character? what is oxidising agent and reducing agent?
the N-O bond in NO2- is shorter than the N-O bond NO3-. State the reason.
F2 is stronger oxidizing agent than cl2
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
Chromyl Chloride test is not given by chlorides of mercury, tin, silver lead and antimony. Wny?
NCl3 get hydrolysed whereas NF3 not
NF3 IS AN EXOTHERMIC COMPOUND WHEREAS NCl3 IS NOT WHY???
Why is HF not stored in plain glass bottles?
nh3 is good complexing agent
SF6 is not easily hydrolysed whereas SF4 is easily hydrolysed...why...???
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 is holmes signal
why aniline does not under go friedel crafts rxn????
why pcl5 is more covalent then pcl3 ?
Why does reducing property of dioxide decreases from SO2 to TeO2 and SO2 is reducing while TeO2 is an oxidisng agent.
PH3 has lower boiling point than NH3.explain.
if7 exist but icl7 doesnot exist why
Explain the trend
NCl3> PCl3 > AsCl3 > SbCl3 > BiCl3..on the account of d hydrolysis..
thkyu for ny help..!! :))
Why is BiH3 the strongest reducing agent amongst all the hydrides of group 15 elements?
"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 are pentahalides more covalent than trihalides?
wht do we mean by saying that monohalides are dimeric in nature of grp 16??
2> on pg 183 ncrt 1st part plz explain last paragrp above example 7.11
why do noble gas form compounds with oxygen and flourine only?
what is p pie p pie and d pie p pie bond?
why does acidic character decrease down the group?
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 ?
why water does not have reducing property
H3PO2 and H3PO3 act as good reducing agents while H3PO4 does not.
iodine forms I3 but flourine does not form F3
what i meant by ppi ppi ' dpi dpi and dpi ppi bond....???pls xplain
why is H2S is less acidic than H2Te?
why nitrogen has more ionistaion enthalpy than oxygen???
why chlorine bleaches a substances permanently but sulphur dioxide does not?
structure of H2S2O3 ,H2S2O4, H2S2O5, H2S2O6, H2S3O6, H2S4O6, H2S506
why SF6 exists but OF6 does not?
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