Messages posted by varshavallig

hi disproportionation reaction is a reaction in which the same substance goes to a lower oxdn. state and a higher oxdn. state i.e, it gets oxidised and reduced simultaneously.

u can find an example for this in any book.

rate me if u find it useful

!!!!!!!!!!!!!!!

debauch

expound

effeminate

in NH3,H is not e-ve , so it cannot pull the electrons towards itself. but v know that F is the most e-ve element. thus it pulls the e lp towards itself to a greater extent.thus the lp is more close to F in NF3 than to H in NH3. thus bond angle in NH3 is greater than that in NF3.

the diag shows the structure of NH3 and NF3.

cheers!!!!!!

!!!!!!!!!

3000 solved problems in physics can make u more proficient in phy sums. and yes H.C.Verma is good.anyways whatever book u use b confident about what u do and have a clear mind while solving problems. never get tensed . b cool and optimistic.

if u find this useful plz rate me!!!!!!!

cheers!!!!!!!!

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is it Umbridge?

hi

trigonometry and complex nos are very easy if u practise more sums.

i heard that they r very imp.practise them from a book which xplains each step proprely and is reliable.(i cant suggest any bok bcoz choices vary).gravitation (acc. to me) is a very interesting chapter.while solving just remember the basic principles like energy conservation, condition for a satellite to escape the atm,centrifugal F, centripetal F.b thorough with eqn for h and time period of satellite, gravitaional field,F etc.

hope u r confident now!!

all the best!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!

hey how did u get the last step?

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hi

for 1) is here any condition that A+B+C=180?

bcoz i too have a similar sum .

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hi

that was gr8 ,useful indeed.

!!!!!

hi

i got 1.1804 as the pH.is it correct?

if m right i'll give the solution.

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hi

1-c)

2-b)

5-b)

see aufbau principle,it xplains everything

if m wrong b free to correct me

cheers!!!!

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hi

i think the ans is a) because in the oxidation of KMnO4, the oxdn. state of Mn changes from +7 to +6.,

thus eq.wt.=mol.wt.

hope this is correct

if wrong do correct me

if right dont forget to rate me

!!!!!!

sorry got crossed.

SEDATE

garrulous

hre goes my rate 4 u.

tnQ frnd 4 this gt article

rajat,

but the book says that the ans is c)

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hi all!!

i dont feel like reading physics at all. i feel it is boring. i m not able to ans any question in physics. i like chemistry a lot. but u know i cant get into iit with phy alone .i dont have the interest towards phy as i have towards chem and maths.

what shall i do? suggestions r welcome.

!!!!!!

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