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NEET Chemistry Preparation 2019

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Test schedule

9/30/2018
Test on
  • Physics

    U&D

  • Chemistry

    Periodic Properties (I)

  • Biology

    Diversity in the living world

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10/7/2018
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  • Physics

    Vector

  • Chemistry

    Nomenclature (O)

  • Biology

    Biological Classification

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9/30/2018
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  • Physics

    Geo-Optics

  • Chemistry

    Solid State (P)

  • Biology

    Reproduction in organisms

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10/7/2018
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  • Physics

    Wave Optics

  • Chemistry

    Co-ordination Compound (I)

  • Biology

    Sexual Reproduction in flowering plants

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9/30/2018
Test on
  • Physics

    U&D, Vector, Kinematics (11th)

  • Chemistry

    Periodic Properties (I) , Atomic Structure (P) , Nomenclature (O)

  • Biology

    Diversity in the living world, Reproduction in organisms

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10/7/2018
Test on
  • Physics

    Geo-Optics, Wave Optics (12th)

  • Chemistry

    Solid State (P) , Chemical Bonding (I)

  • Biology

    Biological Classification, Sexual Reproduction in flowering plants

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NEET Tests & Papers Solutions

NEET Chemistry Formulas

NEET Chemistry Formulae

Formulae

STOICHIOMETRY

begin mathsize 12px style Relative straight thin space atomic straight thin space mass left parenthesis straight R. straight A. straight M right parenthesis equals fraction numerator Mass space of space one space atom space of space an space element over denominator 1 over 12 cross times mass space of space one space carbon space atom end fraction equals Total space Number space of space nucleons end style

  • Y-map

Density:
begin mathsize 12px style Specific    gravity equals fraction numerator density    of    the    substance over denominator density thin space of thin space water thin space end fraction end style

For gases:
 begin mathsize 12px style Absolute space density open parentheses mass divided by volume close parentheses equals fraction numerator Molar straight thin space mass straight thin space of straight thin space the straight thin space gas over denominator Molar    volume straight thin space of straight thin space the straight thin space gas straight thin space end fraction rightwards double arrow straight rho equals PM over RT end style

Vapour density  begin mathsize 12px style straight V. straight D equals straight d subscript gas over straight d subscript straight H subscript 2 end subscript equals PM subscript gas divided by RT end subscript over PM subscript straight H subscript 2 divided by RT end subscript equals straight M subscript gas over straight M subscript straight H subscript 2 end subscript equals straight M subscript gas over 2 end style
Mgas=2 V.D.

 

 Mole-mole analysis:

 

Concentration terms:
Molarity (M):
begin mathsize 12px style text ∴ Molarity end text open parentheses straight M close parentheses equals fraction numerator straight w cross times 1000 over denominator open parentheses Mol. wt straight thin space of straight thin space solute close parentheses cross times straight V subscript inml end fraction end style

Molality (m):
begin mathsize 12px style text Molality= end text fraction numerator number straight thin space of straight thin space moles straight thin space of straight thin space solute over denominator mass straight thin space of straight thin space solvent straight thin space in straight thin space gram end fraction cross times 1000 equals 1000 straight w subscript 1 divided by straight M subscript 1 straight w subscript 2 end style

Mole fraction (x):
begin mathsize 12px style table attributes columnalign left end attributes row cell therefore straight Mole    fraction    of    solution straight thin space left parenthesis straight X subscript 1 right parenthesis equals fraction numerator straight n over denominator straight n plus straight N end fraction end cell row cell therefore straight Mole    fraction    of    solvent straight thin space left parenthesis straight X subscript 2 right parenthesis equals fraction numerator straight N over denominator straight n plus straight N end fraction end cell end table end style


X1+X2=1

% Calculation:
begin mathsize 12px style table attributes columnalign left end attributes row cell left parenthesis straight i right parenthesis   % straight thin space straight w divided by straight w equals fraction numerator mass    of straight thin space solute    in    gm over denominator mass    of straight thin space solution    in    gm end fraction cross times 100 end cell row cell left parenthesis ii right parenthesis   % straight thin space straight w divided by straight v straight thin space equals straight thin space fraction numerator mass    of straight thin space solute straight thin space in    gm over denominator mass    of straight thin space solution straight thin space in straight thin space ml end fraction cross times 100 end cell row cell left parenthesis iii right parenthesis  % straight thin space straight v divided by straight v straight thin space equals fraction numerator Volume straight thin space of straight thin space solution straight thin space in straight thin space ml over denominator Volume straight thin space of straight thin space solution end fraction cross times 100 end cell end table end style


Average/Mean atomic mass:
begin mathsize 12px style straight A subscript straight x equals fraction numerator straight a subscript 1 straight x subscript 1 plus straight a subscript 2 straight x subscript 2 plus. ... plus straight a subscript straight n straight x subscript straight n over denominator 100 end fraction end style


Mean molar mass or molecular mass:

 begin mathsize 12px style straight M subscript avg equals fraction numerator straight n subscript 1 text    end text end subscript straight M subscript 1 plus straight n subscript 2 straight M subscript 2 plus. .. plus straight n subscript straight n straight x subscript straight n over denominator straight n subscript 1 plus straight n subscript 2 plus. .. straight n subscript straight n end fraction text            end text Or text            end text straight M subscript avg equals fraction numerator begin display style sum from straight j equals 1 to straight j equals straight n of straight n subscript straight j straight M subscript straight j end style over denominator begin display style sum from straight j equals 1 to straight j equals straight n of straight n subscript straight j end style end fraction end style

Calculation of individual oxidation number:

Formula: Oxidation Number=Number of electrons in the valence shell-number of electrons left after bonding

Concept of Equivalent weight/Mass:
For elements, equivalent weight (E) = begin mathsize 12px style fraction numerator Atomic straight thin space Weight over denominator Valency straight thin space minus straight thin space factor end fraction end style
For acid/base, begin mathsize 12px style text E= end text fraction numerator straight M over denominator Basicity divided by Acidity end fraction end style
Where M=Molar mass 

 begin mathsize 12px style For space Oxidation backslash Reduction ,    straight E equals fraction numerator straight M over denominator no. of straight thin space moles straight thin space of straight thin space straight e to the power of blank to the power of minus end exponent gained divided by lost end fraction end style

begin mathsize 12px style Equivalent space weight space open parentheses straight E close parentheses equals fraction numerator Atomic straight thin space or straight thin space molecular straight thin space weight over denominator straight v. straight f. end fraction end style

(v. f. = valency factor)
Concept of number of equivalents:
begin mathsize 12px style No. of text  e end text quivalents straight thin space of straight thin space solute straight thin space equals fraction numerator Wt over denominator Eq. wt end fraction equals straight W over straight E equals fraction numerator straight W over denominator straight M divided by straight n end fraction end style

No. of equivalents of solute= No. of moles of solute × v.f

Normality (N):

begin mathsize 12px style text Normality end text  ( straight N )= fraction numerator Number straight thin space of straight thin space equivalents straight thin space of straight thin space solute over denominator Volume straight thin space of straight thin space solution straight thin space left parenthesis in straight thin space litres right parenthesis end fraction end style
Normality=Molarity × v.f

Calculation of valency Factor:
n-factor of acid = basicity = no. of H+ ion(s) furnished per molecule of the acid.
n-factor of base = acidity = no. of OH-. ion(s) furnished by the base per molecule.

At equivalence point:
N1V1 = N2V2
n1M1V1 = n2M2V2

Volume strength of H2O2:

20V H2O2 means one litre of this sample of H2O2 on decomposition gives 20 lt. of O2 gas at S.T.P.

 Error converting from MathML to accessible text.

Error converting from MathML to accessible text.

Measurement of Hardness:
begin mathsize 12px style Hardness    in    ppm equals fraction numerator mass straight thin space of straight thin space CaCO subscript 3 over denominator Total    mass    of straight thin space water end fraction cross times 10 to the power of 6 end style


Calculation of available chlorine from a sample of bleaching powder:

 Error converting from MathML to accessible text. Where x= molarity of hypo solution and v=mL. of hypo solution used in titration.

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