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SAMPLE PAPER
CHEMISTRY
SET-III
Time Allowed : 3 Hours
Maximum Marks : 70
General Instructions :
(i) All question are compulsory.
(ii) Marks for each question are indicated against each.
(iii) Question No. 1 to 10 are very short answer questions
each of 1 mark. answer them in one word, phrase or one sentence each.
(iv) Questions 11 to 26 are short answer questions of 2
marks each. Answer them in about 30 words each.
(v) Questions 27 to 32 are short answer questions of 3
marks each.
(vi) Question 33 and 34 are long answer questions of 5
marks each. Answer them in 70 words each.
(vii) USe log tables if necessary. |
| Q.1. |
What are the possible values of
quantum numbers (n) and (I) for the unpaired electron in the atom of an element with
atomic number = 9. |
| Q.2. |
An element occurs in the bcc
structure. How many atoms of the element are present in the unit cell? |
| Q.3. |
Consider the following reaction
2NO(g) + 2H2(g) --N2 (g) + 2H2 O (g) This reaction is of
first order with respect to H2 and of second order with respect to NO.
Write the rate law for this reaction. |
| Q.4. |
Lithium shows similarities to
Magnesium in chemical behaviour. What is the cause of this similarity ? |
| Q.5. |
What happens when Xe F6
is hydrolysed ? |
| Q.6. |
Complete blank ....... The
complexes with co-ordination number 6 having three ....... ligands are optically active. |
| Q.7. |
The size of trivalent ions in the
lanthanide series decreases steadily with increase in atomic number. what is this
known as ? |
| Q.8. |
How do (i) atomic number (i) mass
number of a radiosiosotope change when it loses a b - particle. |
| Q.9. |
What do (x) and (m) signify in the
following expression x/m = KP 1/n |
| Q.10. |
How do amino acids form protein ? |
| Q.11. |
Edge length of unit-cell NaCl is
564 pm. Calculate the density of NaCl (NA = 6.02 x 1023, Na =
23 and Cl = 35.5 ) |
| Q.12. |
(a) Draw a labelled diagram to
show the change is vapour pressure of solvent when a non-volatile solute is added to it. (b) Show the change of boiling point of the solvent in this diagram.
|
| Q.13. |
(a) What is the relationship
between enthalpy change DH and the internal energy change (DE) for a process occuring at
constant pressure and constant temperature. (b)
What is the value of Dn for the following reaction. |
| Q.14. |
Iron does not rust even if the
Zinc coating is broken on a galvanised iron pipe but rusting takes place much faster if
tin coating over iron is broken. Explain. |
| Q.15. |
The reaction CH3 COOH (I) + C2H5
OH (I) --CH3 COO C2H5 (I) + H2 O (I) was
carried out at 270C by taking 1 mole of each reactant. At equilibrium 2/3
of the reactants got consumed. Calculate the free energy change for the reaction (R
= 8.314 J-1 mol-1) |
| Q.16. |
How will you distinguish between
the following pairs of compounds : |
