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FOR ENGINEERING ENTRANCE ASPIRANTS




BEING ONE , WHO IS REASONABLY SUCCESSFUL
IN THIS ARENA,I WOULD LIKE TO OFFER YOU SOME VALUABLE
TIPS FROM A STUDENT'S POINT OF VIEW.I'M SURE THAT YOU
WILL FIND IT USEFUL

NOTHING IS MORE VALUABLE THAN HAVING A STRONG DEDICATION.SET
PRACTICAL SHORT TERM GOALS AND WORK FOR THAT

WHATEVER THE SUBJECT IS , BLIND PROBLEM SOLVING WON'T DO ANY
GOOD FOR YOU .EVEN IF YOU SOLVE 10000 QUESTIONS, YOU
MIGHT GET ANOTHER DIFFERENT ONE .THIS IS APPARENT IN
EXAMS LIKE IIT-JEE WHERE QUESTIONS SELDOM REPEAT.SO
IT IS IMPERATIVE THAT YOU LEARN THE SUBJECT WELL .


PHYSICS

IN PHYSICS, DON'T NEGLECT THE PORTION ON DIMENSIONS AND UNITS
IT IS A POWERFUL TOOL FOR LOCATING ANSWERS TO OBJ:
QUESTIONS .U CAN SEE IT FROM THE FACT THAT IF THE
OPTIONS ARE IN EXPONENTIAL OR TRIGONOMETRIC TERMS,
THEY WON'T HAVE ANY DIMENSIONS IN CASE OF CORRECT
ANSWERS

MASTER THE CONCEPTS OF FREE BODY DIAGRAMS IN CASE OF LINEAR
AND ROTATIONAL DYNAMICS .THE LATTER ONE IS A SUB:
IN WHICH STUDENTS HAVE GOT THE LARGEST NUMBER OF
MISCONCEPTIONS.DIFFERENCE BETWEEN ROLLING,LINEAR MOTION AND ROTATION MUST BE CLEARLY UNDERSTOOD.

NEVER USE THE EQUATION v = rw BLINDLY.IT IS VALID ONLY IN CASE
OF PURE ROTATIONAL OR ROLLING MOTION.IN CASES OF
SLIDING , THERE WILL BE ANOTHER RELATION BETWEEN
v AND w .

MOMENT OF INERTIA IS THE ANALOGOUS QUANTITY OF MASS IN ROTATIONAL
DYNAMICS.A BODY IN PURE TRANSLATION CAN HAVE MOMENT
OF INERTIA.
THE FORMULA WORK DONE = AREA UNDER GRAPH IS VALID ONLY FOR P-V
DIAGRAMS.

YOU SHOULD BE ABLE TO UNDERSTAND THE PHYSICAL MEANING OF CONVER-
-SION BETWEEN PATH AND PHASE DIFFERENCE

THERE IS A STRONG RESEMBLENCE BETWEEN ELECTROSTATICS AND GRAVIT-
-ATION . YOU MUST GO THROUGH DERIVATIONS OF POTENTIALS
AND FIELDS IN BOTH CASES. IIT'S SET QUESTIONS IN WHICH
YOU'LL HAVE TO DERIVE THESE QUANTITIES FOR ARBITRARY
SHAPED BODIES

IN OPTICS , I URGE YOU TO STUDY THE OLD SIGN CONVENTIONS. PROBLEMS
IIT QUESTION PAPERS ARE TAILOR MADE TO EXPOSE THE
VULNERABILITY OF STUDENTS WHO DON'T KNOW TO USE THE
NEW SIGN CONVENTIONS PROPERLY.THE RAY OF LIGHT IN MOST
CASES COME FROM RIGHT,SO THAT U'LL HAVE TO INVERT THE
SIGNS , IF U'R USING THE NEW SIGN CONVENTIONS.

IN WAVE/RAY OPTICS ,ALWAYS KEEP THIS CONCEPT IN MIND--IF THE RAY IS
REFLECTED FROM THE BOUNDARY OF A RARER MEDIUM ,NO PHASE
CHANGE WILL RESULT.ELSE , THERE WILL BE A PHASE CHANGE
OF "PI"

THE BEST PHYSICS BOOK WHICH'LL TEACH YOU THE CONCEPTS IS "RESNICK
AND HALLIDAY".



CHEMISTRY

CHEMISTRY OFFERS YOU THE EASIEST WAY TO SCORE MARKS.WITH A LITTLE
BIT OF NUMERICAL SKILLS AND SOLID FOUNDATION,U CAN TAKE
PHYSICAL CHEMISTRY WITH EASE.

UNDERSTAND THAT THE ACTIVE MASS OF WATER IS NOT UNITY.IF ACTIVE MASS
OF WATER COMES IN THE DENOMINATOR OF EXPRESSION,IT IS
MULTIPLIED WITH EQUILIBRIUM CONSTANT TO GET A NEW
CONSTANT Ka . Ka = K x [H20] . [H20] = 52.5 moles/lit.

STUDY PHYSICAL CHEMISTRY FROM "S.K AGGARWAL'S IIT CHEMISTRY".FOR
INORGANIC CHEMISTRY , U CAN USE ANY STANDARD BOOK .IT
IS IMPOSSIBLE TO STUDY IT COMPLETELY, SO LIMIT YOURSELF.
DON'T FORGET TO STUDY THE INORGANIC REACTIONS GIVEN
IN NCERT TEXTS AS ALMOST ALL ENTRANCE EXAMS HAVE
QUESTIONS FROM THEM

ORGANIC CHEMISTRY IS OFTEN A GREAT HEAD ACHE TO MANY STUDENTS.
HOWEVER WITH A LITTLE BIT OF GUIDANCE, IT CAN BE MASTERED
WITH EASE.

THE TOPMOST PRIORITY IN ORGANIC CHEMISTRY SHOULD BE GIVEN TO
LEARNING REACTION MECHANISMS.START FROM BASICS SUCH
AS INDUCTIVE EFFECT, RESONANCE ,HYPERCONJUGATION ETC .

REMEMBER THAT FOR HALOFORM REACTION TO TAKE PLACE , IN ADDITION
TO THE PRESENCE OF CH3C0 GROUP , THERE IS ANOTHER CONDITION
THAT IT SHOULD BE ATTACHED TO A CARBON ATOM .THIS
EXPLAINS THE REASON OF ACETIC ACID NOT GIVING THE
REACTION

NITRO BENZENE CANNOT BE ALKYLATED DUE TO -I AND -M EFFECTS

RESONANCE ALWAYS DOMINATES OTHER EFFECTS.IT IS VERY DIFFICULT
TO CONVERT A RING COMPOUND HAVING RESONANCE TO NON-
RESONATING STRUCTURES

ACIDITY OF AN ORGANIC COMPOUND IS DETERMINED BY THE STABILITY
OF ITS CONJUGATE BASE AND VICE VERSA

IN CONVERSIONS INVOLVING BENZENE RING ,MAKE USE OF THE OFTEN
IGNORED POSSIBILITY OF USING BENZAMIDE REACTION
-- (KNH2/NH2-) --

IN REACTIONS, ALWAYS REALISE WHICH HYDROGEN ATOM GOES TO
WHICH POSITION.IITs HAVE A HABIT OF USING DEUTERIUM
ALONG WITH HYDROGEN.YOU'LL BE ABLE TO WRITE THE
FINAL PRODUCT ONLY IF YOU'RE SURE OF THIS ASPECT


MATHEMATICS

MATHEMATICAL TALENT IS AN INBORN QUALITY .IT IS VERY DIFFICULT
TO ACHIEVE IT THROUGH HARD WORK ALTHOUGH IT IS
NOT IMPOSSIBLE
IN CASE OF BOTH TRIGONOMETRY AND CO-ORDINATE GEOMETRY ,
WELL DRAWN MEANS HALF DONE .

INTEGRATION IS A TASTE ACHIEVED BY PRACTICE . YOU'VE GOT
TO MAKE THE RIGHT SUBSTITUTIONS AT THE RIGHT MOMENT




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