XII CBSE CHEMISTRY(043)-2016 MODEL SET-1
|
DR SUDHIR TOMAR
|
MODEL CBSE BOARD PAPER XII
CHEMISTRY-(043)
|
|
2015-2016 SET -1
|
Dr. Sudhir Tomar
1/1/2016
|
SAMPLE QUESTION PAPER
CHEMISTRY (043)
CLASS- XII - (2015-16)
: Time Allowed: 3 Hrs Maximum Marks 70
General
Instructions:
1. All questions
are compulsory.
2. Question No.
1-5 are very short answer questions and carry 1 mark each.
3. Question No.
6-10 is short answer questions and carries 2 marks each.
4. Question No.
11-22 is also short answer questions and carries 3 marks each.
5. Question No.
23 is value added questions and carry 4 marks.
6. Question No.
24-26 carry 5 marks
7. Use log
tables if necessary, use of calculators is not allowed.
Q1. What is co-ordination number when an atom
occupying the position in deep of first row in two
Dimensional.
Q2. What happen when R.B.C is putted in 0.75%
aqueous solution of NaCl?
Q3. What is peptisation?
Q4. What happens when glucose reacts with red
P and HI. Give equation?
Q5. Write IUPAC name of C 6H 5-CH
2-CH 2NH 2.
Q6. Write short notes on
(i)
Alpha helix and beta pleated sheet.
(ii)
Denaturation of proteins.
OR
Write
difference between DNA &RNA
Q7. How you will distinguish between.
(i)
Formaldehyde and acetaldehyde.
(ii)
Methyl alcohol and ethyl alcohol.
Q8. Write notes on.
(i)Garbriel
pthalamide reaction.
(ii)
Etard reaction
Q9. Convert the following.
(i)
Phenol into aspirin
(ii)
Methane amine into ethane amine
Q10. Arrhenius reaction follows the first order
kinetics. This is
K= A.e-28000K/T .Find out activation energy.
Q11.
(i)Elements having mass 56 occupying FCC geometry. If edge length is 200
pm then
Find out density of this crystal?
(ii)Why NaCl Impart yellow colour,
when it keep in contact with air?
Q12. (i) 5% aqueous solution of glucose is
isotonic with 0.897% aqueous solution of cane
Sugar. Find out molecular mass of
sugar.
(ii) 0.45 M solution of Cacl2 undergoes
40% dissociation find out elevation in boiling
point.Kb =1.35 k kg/ mol.
Q13.
(i) If a
Radioactive substance undergoes 50% dissociation in 10 min.How much amount of
it will left in 25 min?
(ii)Define rate of reaction.
Q14.
(i) A cell is given
Ag/Ag +(0.2M ) //
Ni 2+ ( 0.1M)/Ni
If E0 Cell =1.26 V. Find out overall potential of
this cell?
(ii)How much faraday will be
required to deposit 27 gm of Al from molten Alcl3?
Q15. (i) What do you mean by acidic flux.
(ii)What is the role of pine oil in
froath flotation process?
(iii)Which type of metal can be
purified by zone refining?
Q16. (i)Write
IUPAC name of K2 [Zn (en)3(HO)2]
(ii)Complex [Ni (CO)4]
occupying colourless while [Nicl4]2- is coloured. Show
how it is
Possible.
Q17.
Give chemical equation which occur
(a) duing the test of drunker driver?
(b) White phosphorous react with
water in alkali medium?
(c)XeF 6 + H
2O ---------------Ã
Q18. (i)Drow
the structure of (a) HclO4 (b)
H 2S2 O 8
(iii)
Icl3
is more reactive then I2.?
Q19 (i) Give the
chemical equation for the preparation of
KMnO4?
(ii)Mn3+ and Cr2+
both have d4 configuration but Mn3+
act as
Oxidizing while Cr2+acts
as reducing agent. Explain?
Q20.(i) Phenol show acidic character but other alcohol
does not.Expalin?
(ii)Aniline does not give friedal
craft reaction?
(iii)An organic compound has C 5H
10formula. It does not react with cl 2 in dark but give
Monohalogen derivatives in sun
light. What is the IUPAC name of organic compound?
Q21. (i)
What is difference between between Buna-N AND Buna-S.?
(ii)What do you mean by
vulcanization?
(iii)Write monomers and uses of
nylon-6?
Q22. (I)What do you mean by Broad spectrum
antibiotics?
(ii)What are antihistamines? Give
examples?
(iii)What is role of tranquilizers
in sleeping pills?
Q23.Harimohan
is diabetic patient. Now days he is suffering from infection and fever. His neighbor
tells him to take aspirin twice a day so that his fever and pain will control.
Harimohan follow the direction of his neighbor because he was an old man and
educated person, but Harimohan problem raise in two three days …
Read the
above passage and answer the following question
(i)Is it safe aspirin for Harimohan?
(ii)What should Harimohan do?
(iii)Why Harimohan suffering from
fever?
(iv)What precaution Harimohan should
follow?
Q24 (i) What is the coordination number of carbon, in diamond?
(ii)What kind of adsorption is represented by the
following graph?
(iii)Arrange the following in Acidic strength:
HNO3, H3PO4, H3AsO4
(iv)
HClO4 is more
acidic than HClO3.
(v)
Sc3+ is more
stable than Sc2+.
Q25. (i)What
is the equivalent wt. of KMnO4 in?
(a) Acidic Medium
(b) Neutral Medium (c) In alkaline Medium
(iii)
How t2g and eg
orbitals are formed in an octahedral complex?
Q26. (i)A
cationic complex has two isomers A & B. Each has one Co3+, five NH3, one Br and
one SO42. A gives a
white precipitate with BaCl2 solution while B gives a
yellow precipitate with AgNO3 solution.
(a) What are the possible structures of the
complexes A and B ?
(a) Will the two complexes have same colour?
(ii)Identify
A, B, C, D, E, R, R¹ in the following:
|
(i) Br + Mg ————® A ————®
B
Dry ether
D2O
(ii) R
— Br + Mg ————® C ————®
CH3 — CH — CH3
|
D
CH3 CH3
| | Na/ether Mg H2O
(iii) CH3 — C — C — CH3 ¬————
R¹X ———® D ———®
E
| |
CH3 CH3
******************************************************************************************************
DR SUDHIR TOMAR
M.Sc
(inorganic chemistry).M.Sc (physical chemistry)
M.Ed,,ph.D,,LLB
Email;;drsudhirtomar@gmail.com
Bloog;;drsudhirkumarchemistry.blogspot.com
Cont;;9718704142
BY -DR SUDHIR TOMAR
Comments
Post a Comment