Chemistry – Section I – Important Question Bank for Maharashtra Board HSC 2016 examination

Chapter   1-Solid   State

1.  Crystalline and   amorphous   substances   diamond, graphite   fullerene
2. Bravais lattices-Edge   length   and   angles
3. Diagrams of   arrangement   of   atoms   not   asked
4. Defects in   crystal   lattices
5. Semiconductors  n   and   p   type
6. Numericals on   calculations   of   density   of   scc   bcc   fcc   unit   cell

Chapter-2-Solutions   and   colligative  properties

1. Many definitions   and   formulae   meanings   of   different   terms   in   it
2. Derivations-Raoults law   ,   molar   mass   and   relative   lowering   of   vapour   pressure,   solution   equation,   I   factor   and   degree   of   dissociation
3. No diagrames
4. Numericals many   types   like   molarity,   molality,   relative   lowering   of   vapour   pressure, osmotic   press,   molar   mass,   I   factor

Chapter-3-Chemical   thermodynamics   and   energetics

1.  Many definitions
2. Derivations of   work   done,   Gibb’s   energy   and   eqm   constant,   Hess   law
3. Numericals on   work   done   ,enthalpy,   entropy,   internal   energy,   Hess   law,   Gibbs   free   energy.   No   diagrams.

Chapter-4-Electrochemistry

1.   Definitions,Statements-Laws
2.   Diagrams
3.   Long questions-   determination   of   cell   constant   ,salt   bridge,   Daniel   cell,   measurement   of   emf,   emf   series,   SHE,   calomel,   dry   cell,   lead   accumulator,   fuel   cell
4.  Numericals-conductivity Faradays   laws,   Nernst   equation,   cell   potental,   equilibrium   constant   and   cell   potential

Chapter-5-Chemical   kinetics

1.   Definitions Order   of   reaction   and   molecularity  Rate   of   reaction,   rate   law,   rate=k[A]x[B]y
2.  Order of   reaction   and   molecularity   units   of   rate  ,k.   Derivation-   integrated   rate   law   for   first   order   reaction
3.  No diagrams
4.  Numericals-rate constant   ,   half   life

PHYSICAL   CHEMISTRY

For Std   XII,   Numericals   are   of   3   and   4   marks   for   CET   they   are   1   Mark.   Read   the   numerical   questions   properly

•  Select   the   formula   from   given   data   and   what   is   asked   to   calculate
• Sometimes   extra   information   is   given   like   temperature   or   pressure   which   is   not   used   in   calculations
• See   that   units   are   same   here   as   students   make   mistake   and   take   units   as   it   is for Eg :  g   and   kg or R   value   in   J   and   w/∆H   in   kJ
• After   substituting   values   in   the   formula correctly   use   log   table.   10’s   power   add   at   the end
• Students   make   mistakes   in   putting   decimal point   hence   learn   properly   the   use   of   log   table from   a   maths   teacher
• We   should   also   know   the   conversion   of   units between   m↑​3, dm↑​3, cm↑​3,   mm   etc.
• After   calculation   write   units   along   with   your numerical   values
• Remember   no   units   for   constants
• You   can   solve   numericals   properly   provided   you know   all   the   formulae   along   with   terms   used   in formula   by   heart
• Write   logs   on   one   side   of   the   page
•  Do   not   keep   numericals   from   any   units   as   option,some   logs   of   constant   remember   by   heart   to   save time
• Mole   concept   is   basic   ideas   for   numericals   in   Std XII   Board   exam   as   well   as   competitive   entrance exam
• In   XII   std   exam   if   time   does   not   permit   then atleast   write   correct   formula   as   it   carries   some mark
•   Along with   numericals   there   are   definitions, terms   to   explain   and   some   derivations   which   maybe   asked   for   2   or   3   marks
• Long questions   are   combining   2   questions   or many   i.e.   sum   of   all   remaining   weightage.   The   long   questions   is   of   7   marks.   There   is   always   a break   of   7   marks.   The   questions   are   labeled diagram (descripTion   should   include   important points)
•   Reactions
• Advantages /   disadvantages   /   uses   etc
•  Measurement   of   emf   of   cell   /   Daniel   cell   /   Dry cell   /   Fuel   cell   /   Colomel   electrode   /   lead accumulator/   methods   to   avoid   corrosion   /applications   of   emf   series   etc.   can   be   asked for   4   marks

Chapter-6-General   principals   and processes   of   isolation   of   elements

1.   Short   notes-   concentration   processes   ,Froth floatation, leaching,   roasting   ,   calcination,   pyro,   hydro,   electro-metallurgy,   refining process,   etc
2. Many diagrams[no   Ellingham   diagram]
3.  Many reactions
4.  No   numericals

Chapter-7-p-block   elements

1.   Trends in   physical   and   chemical   properTies   of 15,   16,   17,18   groups,   anomalous   behaviour   of first   element   of   each   group
2.  Many reactions
3.  Many structures-   oxides   of   N,   P,   S,   and interhalogen   compounds,   PCl3   ,PCl5,   oxyacids of   P   and   Cl
4.  Diagrame- allotrpes   of   S   and   P,   PCl3,   PCl5,   IF7
5.  No numericals