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The answer is A.
As the electronegativity of the atom attached to the Carbon atom decreases, the polarity of the bond also decreases. Hence,

CCl > CBr >CI

This much is clear.

But CCl > CF!

Why?

Because although fluorine is more electronegative, due to the small size of the Fluorine atom the dipole moment, which is the product of the charge and the separation between the charges, comes out to be smaller than in the case of CCl.

Thanx dude!
This always confused me. Got it now!

Yes, for Chemistry, the NCERT textbook is more than enough, or so my teacher says. I haven't even touched the Physics textbook, but I reckon that you should buy a refresher for physics.

I will attempt the 'Writing' Section first, then the section based on the textbook and, in the end, the easiest of them all, the 'Reading' section.

I saw the BBC book you are talking about and I thought it was good. The Golden Guide is certainly a great help. But I don't use any reference book. I guess you would be interested to know that the Oxford University Press, India also publishes a book for Class 12 CBSE English Examination. Try that one out. It must be good!

I also struggled 'saving' NCERT textbooks for a while, but I figured it out.

When you have downloaded the book, simply click the 'File' tab on the top (to your left) and then click the 'Save' option (it may be 'Save file as' etc.).

Don't try to open the file as soon as you see it on your PC, it won't open.

Wait for its link to be saved. When you see the link saved right next to the file, you are ready to use it!

Nice work!

Count me in!

It's lucidly explains each and every concept. A wonderful book to learn Organic Chemistry.

Not my day!
Great entertainment at your own expense!

Hello everyone!

I am a student of Class 12 and I believe (and so does everyone around me) that I am in a miserable state of affairs in my academics.

This is my score-sheet in my half-yearly exams.

Maths - 29/100 F
Chem - 34/70
Phy - 22/70 F
Eng - 89/100 (not bad, huh!)
Hindi - 89/100 (not that bad either!)

It's not that I have been this bad all through my life. I scored 90.0 % in 10th board CBSE and 76% in Class 11 (CBSE).

But as you can see, things are pretty different now. My parents expect me to touch the 90 mark again. If only I could get my PCM up to the mark, that could become a possibility.

Everything seems so tough now. I feel like I am the dumbest person on Earth. I can't seem to understand even the simplest of concepts.

I admit to have wasted time uptil now, but that was because I have been in a state of depression since the beginning of Class 11. Now, I am ready to work as hard as I humanly can, but nothing seems to be going right.

The Pre-boards are around the corner and I am already suffering from excessive anxiety and sleepless nights made even worse by nightmares about my failing in the Board exams when I do manage to doze off. All this is making matters worse as I am not able to focus on my studies.

I am no position to even think about taking competitive exams. I just want to pass the Board exams with good ( and my idea of 'good' has gone down several notches along with my self-esteem) marks.

Do you think I have enough time to turn things around?

I haven't learned properly even a single topic of Maths so far. When I take up Calculus to study, I begin to wonder how outstandingly brilliant my previously dumb classmates have become as I can't seem to make head or tail out of it. I feel so terrible when can't get through even the first exercise of any chapter.

I do not think I have time enough to do voluminous books like RD Sharma or RS Aggarwal. I have heard that NCERT Maths textbook is good enough for Boards. If I complete each and every topic from the NCERT textbook, would I be able to fare well in the exams; or is it necessary to refer to books like RD Sharma or RS Aggarwal? At the moment, only the NCERT textbook seems like doable for me. But the question is: is it good enough?

Please help! You know how desperate I am!

Please somebody answer this as soon as possible ! It's absolutely urgent!!!

Prove using mathematical university, x2n - y2n ( 2n is the power) is divisible by x+y.

I shall be very, very, very grateful to whoever answers the question.

Thank you.

Electrochemistry. Because I have a great command over it.

Theism or Atheism?

I understand the concept of 'dynamic equilibrium'. But I somehow cannot get hold of 'static equilibrium'. Could somebody please exaplain it with a few examples?

Thanks.

May be Puneet belonged that small class o fthose students in India who are fortunate enough to get a good education at school. Personally, I dislike the very thought of going to school, and I dare say most of the IIT- aspirants
reading this would agree to it to some extent. Unfortunately, my school compels the students to attend school daily, and I bet you would not like to be in my shoes at the moment.You are a lucky guy, believe me! Keep playing truant, buddy!

Goodbye!