SARA RESULTS

IX CBSE PREPARATORY/ENTRANCE RESULTS
9028 - 49.5%
9002 - 27.5%
9029 - 65%
9001 - 75%
9008 - 36.3%
9020 - 51.2%

SARA RESULTS

IX STATE PREPARATORY/ENTRANCE SUNDAY (06/12/09)
9023 - 60%
9025 - 36%
9019 - 72%
9009 - 50%
9010 - 24%
9018 - 36%
9006 - 40%
9007 - 52%
9021 - 44%
9024 - 48%

PARENTS ARE REQUESTED TO CHECK THE MARKS. THOSE SCORED LESS THAN 40% SHOULD TAKE UP RE TEST SPECIFIED BY THE INSTITUTION.

SARA RESULTS

IX ICSE PREPARATORY/ENTRANCE RESULTS
9011 - 57.5%
9012 - 42.5%
9014 - 40%
9003 - 46.5%
9022 - 87.5%
9013 - 63%
9026 - 55%
9005 - 71.3%
9004 - 49.5%
9016 - 69.5%
9015 - 56.3%
PASS ------------- IS 40%
SELECTED CANDIDATES CAN MEET THE DIRECTOR TODAY(SUNDAY-6/12/09) @6.45P.M. ONWARDS

PREPARATORY CHEMISTRY ANSWERS X ICSE(6/12/09)

                                                    X-ICSE

                                                  CHEMISTRY

               Section-I

1. (A) I). nitric oxide , steam and energy

ii) Merquery

iii)Alkanol

iv) Ammonium nitrate -------->  Nitrous oxide   +Steam

v) Aqua regia

(b) i)  1. F  < Cl  < Br < I< At

        2.  I < Br < Cl  <  F

ii) Mg and Mn

iii) Vanadium pentaoxide  or platinum

( c) 2H S    + 3 O  ----------->  2 H O   +  2 SO

    68 gm      96 gm                  36 gm       128 gm

As  128 gm sulphur dioxide yields by burning of  68 gm hydrogen sulphide

So  12.8 gm sulphur dioxide yields by burning of = 68 X 12.8   / 128

                                                                        = 6.8 gm hydrogen sulphide

As 128 gm sulphur dioxide occupies volume =22.4 l at S.T.P.

So 12.8 gm sulphur dioxide occupies volume =22.4  X  12.8/128 l at S.T.P

                                                                   =2.24 l at S.T.P

(d) (i) Dil.Sulphuric acid 

(ii) Dil. Nitric acid

(iii) 1. Zn   + HCl  ---------> ZnCl2   + H2

2. 2 NaOH  + H2So4  ----------> Na2SO4  + 2H2O
3. CuO    +  4HNO3    -------->  Cu ( NO3) + 2NO2 + 2H2O

(e)

(f)(i) Na2SO3    +  2 HCl     -------------> 2 NaCl  + H2o  + So2

     (ii) 2NH3     + 3CuO  --------> 3Cu  + 3H2O  + N2

(iii) CuSO4    + 5H2O   ---------->  CuSO4.5H2O

(iv) C6H12 O6  --------> 6C   + 6H2O

(v) AgNo3  + 2NaCl   ---------->  AgCl2   +  NaNO3

(g) (i) Fe  + H2SO4      ---------->FeSO4   + H2

(ii) Cu   + Con. 4HNO3    ----------->  Cu( NO3)  + 2H2O + 2NO2

(iii) H2S  + H2SO4     -------------> S + 2H2O   + SO2

(iv) Cl2 + So2 + H2O  -------------->  2HCl  + H2SO4

(v)  C2H2   +  2AgNO3  + 2NH4OH    -----------> Ag-cc-Ag  + 2NH4NO3  + 2H2O

(h) (i) Li

  (ii) F

(iii) F

(iv) Li ,Na , K

(v) Greater as no. of shells increases

                      Section-II

Ans-2 (a)

Element	% Composition	At. Wt.	Relative no. of Atoms	Simplest Ratio
C	85.7	12	85.7/12=7.14	7.14/7.14=1
H	14.3	1	14.3/1=14.3	14.3/7.14=2

Emperical Formula=  CH2

(b) molecular mass of E.F.= 12+ 2 =14

    Relative molecular mass = 28

   , n= 28/14 =2

     Molecular formula= (CH2)2

                               =  C2H4

( c) Acetylene

( d) Double bond

( e) Substitution reaction

( f) C2H4  + H2  ----------> C2H6

Ans-3 . Nitric Acid -1. purification of gold

                             2. Preparation of fertilizers

    ii) Ammonia – 1. As cleaning agent

                          2. Refrigerant in ice plants

    iii) Hydrochloric acid- 1. Extraction of glue from bones

                                      2. Preparation of aqua regia 

(b) (i) 2Al   + 3 H2so4       ---------------> Al2 (SO4)3   + 3H2     +  SO2

     (ii) Al2O3 . 2H2 O  + 2 NaOH  ------------> 2 NaAlO2  + 3H2O

          NaAlO2     + 2H2O    ------------->  NaOH   + Al( OH) 3

         2Al(OH)3    -------------> Al2O3 + 3H2O

Ans-4 (a) (i) With  BaCl2  H2SO4 gives ppt. but HCl not.

      (ii) Metals in general allow an electric current to flow through them and are called conductrors of electricity. While compounds which conduct electricity when dissolved in water are called electrolyte.

   (iii) H2C=CH2     +  H2 ---------> H3C-CH3   ( Ni catalyst)

  (iv) Polar

(b) (i) It is poisonous gas can cause death also.

    (ii) 2Mg + SO2 ----------> 2MgO    +S

          2H2S   + SO2  -----------> 3S  +  2H2O

(iii) Ammonium carbonate

Ans-5 (a) (i) FeCl3 + 3NH4OH   ------------>  3NH4Cl   + Fe(OH)3

                                                                               Reddish brown

     (ii) 2 NH3  + CO2   ----------> NH2.CO.NH2    + H2O

     (iii) Gives sulphite or bisulphate salt  and water

     (iv) 2HBr    + H2SO4    -----------> Br2 + 2H2O   + SO2

     (b) (i) Sodium chloride contains  ionic bond while carbon tetrachloride is covalent.

     (ii)  The reaction is slow and negligible in bthe dark.

     (iii) As very weak metal in activity series.

     Ans-6 (a) (i) As 31 gm P gives 98 gm phosphoric acid

                       So  12. 4 gm gives  98 X 12.4 / 31= 39.2 gm

            (ii) 5 HNO3

                  5[ 1+ 14 + 3X 16 ]

                 5 [ 1+ 14 + 48]

                 5 X 63  = 315  gm

       

      (b)(i)  4NH3  + 5 O2  --------------> 4NO + 6 H2O  + ∆     (  Catalyst Pt, Temp. 800◦c)

     (ii) 2NH3  + 3CuO   ----------------->  3Cu  + 3H2O  + N2

    ( c)(i)  With ethene  it is addition reaction but with ethane it is substitution reaction.

    (ii) Addition reaction

(iii) Dichloro ethane

Ans-7 (a) (i) Aluminium

(ii)         CAthoder

(iii)       Electro –refining

(iv)        Ammonia

(v)          Ammonia

(b) (i)1. Methan-al

 2. Ethanoic acid

 3. Chloro ethane

 4. Ethene

 (ii) 1. CH3 COONa    +  NaOH    ---------------> CH4   + Na2CO3    ( in the presence of CaO )

 2. CH4  -------------> CH3OH     (  Oxidising agent K2Cr2O7)

 3. CH2Cl2   + Cl2 -------------->  CHCl3   + HCl 

SARA PREPARATORY RESULTS-(29/11/09)

X STANDARD RESULTS

                             NAME                 MARKS  RANK   BOARD     

• 1002 - AYUSH AGARWAL   - 99.5      1              1 
• 1024 - SHARJEEL YUNUS  -  95         2              1                 
• 1001 - KUSHAL                    -  91.5      3              2                  
• 1019 - VIKAS                        -   86.5      4              3                  
• 1004 - NIKHIL                      -  85.6       5              4                 
• 1007 - NASIR AHMED       -   80.0       6              5                 
• 1012 - TEJASHREE            -   80.0        6              5                  
• 1027 - MANASA                  -   80.0        6              2                  
• 1008 - RAHUL.N.                -   77.5        7              6                   
• 1026 - MOIZ KAPASI         -   77.5         7              3                    
• 1030 - LAVANYA                -   74.5         8              1                   
• 1009 - AAMIR HUSSAIN  -   73.0        9               7                   
• 1014 - VIKYATH                -    71.3       10             8                   
• 1003 - SHASHANK            -    70.0       11             9
• 1025 - SHAILANDER       -     70.0       11            3
• 1029 - DEEKSHA               -    63.5       12            2
• 1010 - NEHA                       -    60.0       13           10
• 1015 - KARTHIK RAJ      -    54.4        14           11
• 1005 - RAMESHWARA   -     54.0        15           12
• 1022 - SHANMUGAPRIYA-  52.5        16           13
• 1006 - ANANDA                -    52.0        17           14
• 1034 - RAKSHITH            -    52.0        18            3
• 1033 - PRAGUN                -    50.0        19            4
• 1038 - DHIRAJ BABU     -    49.5         20           5
• 1016 - GAUTAM              -     47.0        21           15
• 1011 - RUTUSHA             -     44.0        22           16
• 1017 - ARVIND                -     36.5        23           17
• 1032 - SYED ZAIN           -     36.0        24            6
• 1020 - RUMANA ASAD -      33.0       ----           ---
• 1021 - DENCY                 -      33.0       ----           ---
• 1031 - SHONAKSHI       -      32.0      ------         ----
• 1013 - ROMANA            -      26.5       ----           ---
• 1037 -TANVEER            -      16.0      ------         -----
• 1036 - RAHUL.S.           -       16.0       -----         ----
• 1035 - NAGENDRA      -       06.0       ----          ----                                     
• I PUC RESULTS
• 11O3 - AMINA              -        64.0       1              1
• 1102 - NITHYASHREE-        31.0       ---           ----
• 1106 - KALINGA            -      25.0       ---           ----
• 1105 - RAKESH              -      17.0      -----         -----