IIT-JEE problems

[Jaskanwar Singh]

Bump!

[vickybat]

OH MAN!!! i did a silly mistake in integration. didnt square the t!!!!!!!!!!!!!!!!!!!!!!!

but i said that wouldnt there be 4 HBs surrounding the single NH3 molecule. but i got your point of HBs in moles thanks. and thanks for physx correction too.

Hey jas its not physx but physics. You are confusing between the two. I think nvidia is getting on in your nerves.

Keep it up buddy. Its a nice thread.

[Jaskanwar Singh]

vicky thanks. yaar these words i often confuse

---------- Post added at 05:48 PM ---------- Previous post was at 05:47 PM ----------

guys no questions these days to share?

[nims11]

too busy studying for boards... will post some questions after 7th march(when the big guns, ie physics and chemistry will be over).

[Jaskanwar Singh]

ok no problem. concentrate on your boards first. i will soon post some.

[pauldmps]

I am also devoting my time in studies right now.

Best of luck for the exams Nims. Study hard.

[Jaskanwar Singh]

best of luck to you both

[The Conqueror]

So bad, our examination system still depends on 'Luck'.
All the best guys, do well!!

[pauldmps]

Excuse me, but I'm not giving board exam.I've passed it last year. I'm just studying now for the JEE & other entrance exams.

[Jaskanwar Singh]

oh then best of luck for JEE

[nims11]

thanx all!
@paul any tips for board exams?

[ico]

thanx all!
@paul any tips for board exams?

Go and study.

[rishabh]

hello friends i am in class 11 currently studying in FIITJEE preparing for iit-jee 2012..
i would request u guys to please post questions on the 11th syllabus

[AcceleratorX]

hello friends i am in class 11 currently studying in FIITJEE preparing for iit-jee 2012..
i would request u guys to please post questions on the 11th syllabus

Just study carefully and worry not about what type of questions are going to come. You'd be surprised just how easy it is sometimes to make a question that most students can't solve, but that doesn't mean that you guys don't know the answer. Just stick with it and study hard.

[nims11]

hello friends i am in class 11 currently studying in FIITJEE preparing for iit-jee 2012..
i would request u guys to please post questions on the 11th syllabus

study hard. since you are in Fiitjee, take phase tests seriously as they will play an important part in boosting up your confidence. also never leave a phase topic for end. if you leave it for the end, you will be less likely to cover it up.

[rishabh]

ppl i am in the proper classroom program of FIITJEE so ill have all the FIITJEE material ...GMP , AITS etc.. so i wanted a suggestion from you guys that should i subscribe for the YG FILE and BMAT of BRILLIANT tutorials? ( i don't think their study material is necessary)
( currently i am in 11th.... have my boards in 10 days then ill be in 12th)

[nims11]

^^ Fiitjee alone is enough. I too got The study material of BANSAL from a senior and never got any time to solve it. after solving packages i m busy now solving the GMP and RTPF.

[rishabh]

@nims are you also a fiitjee student ?

[nims11]

^^yup

[abhijangda]

ppl i am in the proper classroom program of FIITJEE so ill have all the FIITJEE material ...GMP , AITS etc.. so i wanted a suggestion from you guys that should i subscribe for the YG FILE and BMAT of BRILLIANT tutorials? ( i don't think their study material is necessary)
( currently i am in 11th.... have my boards in 10 days then ill be in 12th)

No need of BMAT and Y.G. FILE, I have solved Y.G. File and although it is good. It will revise almost all of the concepts of PCM. But if you have GMP and FIITJEE AITS, then there's no need. Also do not go for BMAT, already you have your FIITJEE AITS which is hard (even very hard). Take phase test very seriously. Also solve FIITJEE's Archive.

[Jaskanwar Singh]

Ok here u go-

1.nitration of propane with nitric acid vapour at 430c yeilds?
a. 1-nitropropane
b. nitroethane and nitromethane
c. 2-nitropropane
d. mixture of all the above

2.the reaction of ch4 with cl2 practically does not occur at 150c. Addition of which will enable the reaction to occur at this temp?
A. Hydroquinone
b. O2
c. (C2H5)4Pb
d. PbCO3

3.sin78 - sin66 - sin42 + sin6 is?

4.find relation between a b c d if
asec* - ctan* = d
bsec* + dtan* = c

[rishabh]

okay for the math ones..

Spoiler:

sin78 - sin66 - sin42 + sin6
= (sin78 -sin42) + (sin6 -sin66)
= (2cos60*sin18) + (2sin30*cos36)
= sin18 + cos 36
= root(5)-1 / 4 + root(5) + 1 /4
= root(5)/2

the next one

Spoiler:

is it a^2 + b^2 = c^2 + d^2 ??

[Jaskanwar Singh]

rishabh spoiler is with [].

Here is your reply -

Spoiler:

first is wrong. you made a mistake there.
second correct. congrats

[nims11]

Spoiler:

2. (C2H5)4Pb
3. -1/2

[rishabh]

oh ****!! rectified my mistake... i put plus in place of minus.. ! my bad..

[rishabh]

a nice physics problem.. good for learning purpose,
see the attachment..

[Jaskanwar Singh]

rishabh you identified it.
nims both are correct.

ok i put up options for my first question.

---------- Post added at 10:18 AM ---------- Previous post was at 10:11 AM ----------

rishab in your question it should be 'find the contact force between the cylinder and the block' i suppose?

[AcceleratorX]

It's interesting how the studies for such entrance exams are done.....to be honest, for many questions in physics, for example, there are many ways to approach the problem and the simplest solution may not be the best solution.

Still, entrance exams have only one answer......and of course, it's all about sum solving whereas science is about so much more than solving sums.

Anyway, best of luck to all of you, you seem to be doing well as far as preparations go!

[rishabh]

@Jaskanwar ya ..obviously its 'block' not 'clock' .. sorry for the typo..

[nims11]

a nice physics problem.. good for learning purpose,
see the attachment..

its a hard one but it refreshed my work energy concepts(if the answer is correct)...

Spoiler:

3mgsinθ + 2Fθ - kRθ
???