MODEL EXAM -2013
CHEMISTRY -150
Mark 1 X 30 =30
1.Dual character of an electron was explained by
a) Bohr b) Heisenberg c) de-Broglie d) Pauli
2. The value of Bohr radius for hydrogen atom is
a) 0.529 10-8 cm b) 0.529 10-10 cm
c) 0.529 10-6 cm d) 0.529 10-12 cm
3. If the energy of an electron in the second Bohr orbit of H-atom is -E, what
is the energy of the electron in the Bohr’s first orbit?
a) 2E b) -4E c) -2E d) 4E
4. The bond order of oxygen molecule is
a) 2.5 b) 1 c) 3 d) 2
5. The most common oxidation state of lanthanides is
a) +2 b) +1 c) +3 d) +4
6. Lanthanides are extracted from
a) Limonite b) Monazite c) Magnetite d) Cassiterite
7. The elements in which the extra electron enters (n-2)f orbitals are called
a) s block elements b) p block elements
c) d block elements d) f block elements
8. The Lanthanides contraction is due to
a) Perfect shielding of 4f electron b) Imperfect shielding of 4f electron
c) Perfect shielding of 3d electron d) Imperfect shielding of 3d electron
9. Ceria is used in
a) toys b) tracer bullets c) gas lamp materials d) none of the above
10. The oxidation number of Nickel in the complex ion, [NiCl4]2- is
a) +1 b) -1 c) +2 d) -2
11. The geometry of [Ni(CN)4]2- is
a) Tetrahedral b) Square planar
c) Triangular d) Octahedral
12. The coordination number of Ni(II) in [Ni(CN)4]2- is
a) 2 b) 4 c) 5 d) 6
13. Paramagnetic moment is expressed in
a) Debye unit b) K Joules c) BM d) ergs
14. The number of chloride ions that surrounds the central Na+ ion in NaCl
crystal is_______.
(a) 12 (b) 8 (c) 6 (d) 4
15. A regular three dimensional arrangement of identical points in space is called
(a) Unit cell (b) Space lattice (c) Primitive (d) Crystallography
16. The smallest repeating unit in space lattice which when repeated over and
again results in the crystal of the given substance is called
(a) Space lattice (b) Crystal lattice (c)Unit cell (d) Isomorphism
17. The crystal structure of CsCl is
(a) Simple cubic (b) face-centred cubic
(c) Tetragonal (d) Body centred cubic
18. An example for Frenkel defect is
(a) NaCl (b) AgBr (c) CsCl (d) FeS
19. Semiconductors which exhibit conductivity due to the flow of excess negative
electrons are called
(a) Super conductors (b) n-type semiconductors
(c) p-type semiconductors (d) Insulators
20. Fog is a colloidal solution of
(a) gas in liquid (b) liquid in gas
(c) gas in solid (d) solid in gas.
21. The phenomenon of Tyndall’s effect is not observed in
(a) emulsion (b) colloidal solution
(c) true solution (d) None
22. The Tyndall’s effect associated with colloidal particles is due to
(a) presence of charge (b) scattering of light
(c) absorption of light (d) reflection of light
23. In case of physical adsorption, there is desorption when
(a) temperature increases (b) temperature decreases
(c) pressure increases (d) concentration increases
24. Ultimate products of hydrolysis of proteins is
(a) aniline (b) aliphatic acid
(c) amino acid (d) aromatic acid
25. Proteins are
(a) polypeptides (b) poly acids
(c) poly phenols (d) poly esters
26. Which of the following contains a lipid ?
(a) starch (b) mineral oil
(c) edible oil (d) peptide
27. Diazonium salts give coupling reactions with
(a) alcohol (b) aromatic amines (c) all amines (d) amines and phenols
28. Substances which bring the body temperature down to normal
temperature are known as
(a) antipyretics (b) analgesics (c) antibiotics (d) none
29. The compound which acts both as antipyretic as well as analgesic is
(a) phenacetin (b) sulpha drugs (c) paracetamol (d) aspirin
30. A 1% solution of phenol is a
(a) antiseptic (b) disinfectant (c) antimalarial drug (d) antihistamine
3 Mark 3 X15 =45
1.State Heisenberg’s uncertainty principle.
2.Define orbital.
3.Why is He2 not formed?
4.what is intermolecular hydrogen bonding? Give an example.
5.Write the uses of Lanthanides?
6.Whatare inner transition elements (f block)? Give two examples?
7.In what way complex salt differs from double salt?
8.What are ligands and coordination numbers?
9.Give one example for monodentate ligand, a bidentate ligand and a chelating ligand.
10.Define the terms space lattice and unit cell.
11.What are superconductors?
12.what is coordination number?
13.Define electro osmosis?
14.What is Brownian Movement?How is it caused?
15.What is tyndall effect?
16.what is the action of Con.HI on glucose?
17.what is saponification?
18.Define chemotherapy.
19.what are anaesthetics?Give one examples.
20.what is Buna-S?
5 Mark 7 X 5 =35
1. The ionization energy of hydrogen atom in the ground state is 1312 kJ mol-1.
Calculate the wavelength of radiation emitted when the electron in hydrogen
atom makes a transition from n = 2 state to n = 1 state (Planck’s constant,
h = 6.626 10-34 Js; velocity of light, c = 3 108 m s-1; Avogadro’s constant,
NA = 6.0237 1023 mol-1).
2.Molecular Orbital Theory?
3Extraction of Lanthanides from monazite sand
4. The Octahedral Complexes
i) Fe atom ii) Fe +2
5.Application of Coordination Compounds.
6.Bragg’s Spectrometer method.
7Explain the Technical Applications
a) Electrical precipitation of smoke.
8.Explain the Adsorption Theory.
9.Explain the Rocket Probellants
10.Preparation structure and uses of Glucose and Fructose?
10Mark 10 X 4 =40
1.a)Preparation and structure of Fructose?
b) Explain the functions of lipids in bio systems.
2. a) Condensation polymers. b) Formaldehyde resins.
c)Antispasmodies
3.Electrical properties
i) Charge on colloidal particles
ii)Electrophoresis
4.Explain the Electro dialysis and ultra filtration
5.Explain the dispersion methods:
(6 +2 +2 )
a) Mechanical b) Electro c) ultra sonic and peptisation
6.Explain the Point Defects
a) Schottky defects b)Frenkel defects c) Metal excess defects d) Metal deficiency defects.
7. a) Explain the postulate werner’s theory.
b) Calculate the uncertainty in the velocity of a wagon of mass 3000kg
whose position is known to an accuracy of ± 10 pm (Planck’s constant =
6.626  Kg m2 s-1.