|

 Aniruddh Padia's messages in the community 1 2 GO Go to Page...
Message
 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]
When you shoot a bullet on a glass, the glass doesnt break.... theres just a hole created in it. But if you shoot a bullet on a stone, then the stone crumbles. Why ?
 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]
When you shoot a glass with a bullet, the bullet just penetrates through without breaking the glass. However, when you throw a stone, the glass breaks completely. Why ??
 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

im sorry the answer is           (n^2)/2 + n/6

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

I guess den what the problem means is ....

Find the angle beyond which there will be no refraction .... den in dat case u can't take any angled prism .... but the language of the problem is yet pretty unclear !

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Yes exactly even i was getting 1.

But answer in fiitjee booklets e^(1/2)

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Well i havent missed anything in the problem.

And u can't take a prism of any angle !

This is the problem as it was in objective physics in D.C. pandey.

And i dont want a method to get 60 degrees . i want to know the concept behind the problem .

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Well i havent missed anything in the problem.

And u can't take a prism of any angle !

This is the problem as it was in objective physics in D.C. pandey.

And i dont want a method to get 60 degrees . i want to know the concept behind the problem .

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

where {.} denotes fractional part of x .

And ^ means raised to.

Ans: e^(1/2)

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

ya sorry i did now .... the small box is actually 'd'  for dx

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

where {.} denotes the fractional part of x.

Ans.   ( (n^2)/2  -  n/6)

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

The refracting index of a prism is 2. What is the maximum refracting angle of the prism

(ans: 60 degrees)

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Exactly which formula does one learn to count the lone pairs ?!?  .....

Its better to draw the structure and use hybridisation theory to get the lone pairs.

 Discussion Forums -> This Post 4 points    (0    in 2 votes )   [?]

H2O can be regarded as a strong field ligand.

The Strength goes as follows

I-<Br-<SCN-<Cl-<F-<OH-<C2O42-<H2O<edta4-<NH3<CN-<CO

:)

 Discussion Forums -> This Post 2 points    (0    in 1 votes )   [?]

This is beacuse we cannot just add the emf values directly . We have to add the Gibbs Free Energy and then calculate standard potentials indirectly. This is beacuse the Gibbs Free Energy of the resulting rxn is equal to the sum of the Gibbs Free Energy  of the first two reactions. (By basic definition of enthalpy).

.

.

.

PLEASE RATE IF USEFUL ! :)

 Discussion Forums -> This Post 5 points    (1    in 1 votes )   [?]

The solution is as follows...

SCl2             +        2C2H4    -------  S(CH2CH2Cl)2

At t=0        0.5M                1M                     0M

At t=teqb     0.5-x                1-2x                   x

Now x is given as 0.3 = [S(CH2CH2Cl)2]

Therefore concentration of SCl2 = 0.5-x = 0.2 =  [SCl2]

And concentration of C2H4 = 1-0.6 = 0.4 =  [C2H4]

Equilibrium constant K of this reaction is given by

[S(CH2CH2Cl)2]

[SCl2] X [C2H4]2

Putting values u get Keqb as 9.375

PLEASE RATE IF USEFUL ! :)

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Thats a nice question.

For f(1) when u substitute p as 1 and then find out the first few terms u will get  1- 1/2! + 1/3! - 1/4! .....

which is nothing but      e-1/e ....

The same can be done for the rest of the questions ....

PLEASE  RATE IF USEFUL !! :)

 Discussion Forums -> This Post 5 points    (1    in 1 votes )   [?]

Im sorry sagar but thats wrong .... matrix multiplication doesnt follow that law.

And 'aatman'  the options and the answer both are wrong.

There is a property in trace for three matrices that is the order of a matrix is changed without changing the position of the individual matrices with respect to each other the trace of a matrix remains unchanged.

What i mean is trace(ABC) = trace(CAB)= trace (BCA) .... im not interchangin any 2 positions here .... im just advancing the cycle of the matrix like we do in scalar triple product of vectors.

So here you can also verify that u wont get any of your options by substituting any 3 non singular matrices and u will find out that only   Trace(ABC) = Trace (CAB) = Trace (BCA).

..

if im unclear nudge me ....

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

do it  mechanistically.

Know the correct mechanism of whats happenin in the rxn ..... whether its oxidation or reduction or disproportionation .... etc ...

And make ur own codes for certain rxns whose mechanisms are difficult ... Learning reactions this way could really be fun !

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Mol wt of nitric acid = 63

Therefore no of moles of acid = 0.063/63 = 0.001

Since no concentration is mentioned I am assuming it is in 1 liter solution.

Thus concentration of nitric acid = 0.001 molar

HNO3 = H+ + NO3-

Since it’s a strong acid taking degree of dissociation 1.

# H+ concentration is equal to 0.001 molar

Thus OH- conc. is equal to Kw/ H+

Where Kw is dissociation constant of water = 10^ (-14)

Therefore OH- conc. = 10^(-11)

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Molecular mass is M itself .

I2 + F2  =  IF

So here Iodine’s valency has gone from 0 to +1. Thus there is 1 electron change. However valency factor is defined as change in oxidation no. per atom .

Here change per atom is ½

Thus equivalent wt of iodine = mol.wt./ valency factor = 2M

 1 2 GO Go to Page...
 Go to:  Select a forum   Board Exams - CBSE, ICSE, State Boards   Course Material   Computer Science   Physics   General Physics   Mechanics   Optics   Thermal Physics   Electricity   Magnetism   Modern Physics   Mathematics   Algebra   Trignometry   Analytical Geometry   Differential Calculus   Integral Calculus   Vectors   Chemistry   Physical Chemistry   Organic Chemistry   Inorganic Chemistry   Institutes & Courses   Coaching Institutes & Course Material   About IITs and JEE   Non IIT Institutes   Counselling Zone   Parents Corner   Parent Discussion Board   Biology (for Medical Entrance)   Botany   Zoology   Fun Zone   Lounge   Games, Puzzles and Quizzes   General Knowledge

Name

Mobile

E-mail

City

Class