1. Standard enthalpy change of a substance in elemental form is
a. zero
b. positive
c. negative
d. none
2. Solubility of solid solute in liquid solution is not effected by
a. temperature
b. pressure
c. concentration of both solute and solvent
d. none
3. Energy of electron in one dimensionala box in the lowest energy state for the coordinates x= +a and x=-a
a. E =h2/32ma2
b. E = 0
c. E =h2/8ma2
d. none
4. Which of the following compound has chiral carbon?
a. cis-butene
b. trans-butene
c. cis-1,2-dimethyl cyclopropane
d. trans-1,2-dimethyl cyclopropane
e- both c and d
5. Brownian movement is observed in
a. solution
b. suspension
c. colloids
d. none
6. Highest kinetic energy is associated with
a. solid
b. liquid
c. gas
d. none
7. When an electron jumps from n=6 to n=2. the spectral line series is
a. lyman
b. balmer
c. paschen
d. bracket
8. Which polymer is used in sanitary pipes
a. PVC
b. polyethene
c. polystyrene
d. none
9. Order of reaction which is independent of initial concentration
a. zero
b. first
c. second
d. third
10. For azimuthal quantum number l=1,orbital is ,
a. s
b. p
c. d
d. f
11. SHE consist of
a. Pt electrode
b. Zn electrode
c. Cu electrode
d. None
12. Enthalpy of combustion is always
a. positive
b. negative
c. zero
d. none
13. Hess’s law is based on
a. conservation of energy
b. conservation of mass
c. conservation of momentum
d. none
14. Energy gap between t2g and eg set of orbitals in octahedral according to CFT
a. 0 Dq
b. 8 Dq
c. 10 Dq
d. none
15. In Habers process for the synthesis of ammonia , equilibrium concentration of ammonia = 0.027, hygrogen=0.12, nitrogen == 0.04, the value of Kc will be
a. 0.1
b. 1.0
c. 0.5
d. none
16. For the reaction 2So2 + O2 <……> 2SO3 the increase in pressure shift the equilibrium position towards
a. So2 and O2 side
b. SO3 side
c. no effect
d. none
17. Which factor does not effect rate of reaction according to collision theory
a. temperature
b. pressure
c. stichiometry
d. none
18. Which of following has no effect on equilibrium position
a. Temperature
b. Pressure
c. Catalyst
d. None
19. The polymer used for making food storage tanks and cling wraps is
a. polystyrene
b. polyethylene
c. teflon
d. none of these
20. Pick the best conductor
a. NaCl solution
b. Solid lead
c. Graphite
d. None
21. Concerted reaction means
a. simultaneously bond breaking and bond formation
b. bond breakage in one step and formation in other
c. only bond breakage is involved
d. none
22. Which polymerization has repeating identical units
a. step growth polymerization
b. addition polymerization
c. condensation polymerization
d. none
23. Rate of E2 reaction is effected by
a. concentration of nucleophile only
b. concentration of electrophile only
c. both the concentration of nucleophile and electrophile
d. none
24. Aqueous ammonia solution is 28% w/w. denisty of solution is 0.899 gcm-3. Molar mas is 17.031 g/mol. What is molar concentration
a. 14.8M
b. 0.14M
c. 1.41M
d. none
25. A system absorbs 5kJ heat and work done on surrounding is 50kJ. The change in internal energy is
a. -45
b. 100
c. 60
d. none
26. Osmosis is driven by
a. concentration gradient of solvent
b. concentration gradient of solute
c. concentration gradient of solute and solvent
d. none
27. Most common method of preparation of heterocyclic compound is
a. ring closing reaction
b. coupling reaction
c. FC alkylation
d. none
28. Which of the following is an example of photochemical reaction
a. hydrolysis of ester
b. ozonolysis of alkene
c. electrophilic substitution
d. none
29. Maximum boiling point has
a. CH4
b. C2H6
c. C4H10
d. none
30. Which reaction is mostly used to protect functional groups in organic compounds
a. oxidation
b. reduction
c. acetylation
d. none
31 Ethanol on oxidation by mild oxidizing agent gives
a. CH3COOH
b. CH3CHO
c. CH3OCH3
d. none
32. The most common reducing agent for reducing nitro group into amino group is:
a. NaBH4
b. LiAlH4
c. HI/P
d.none
33. The specie that is reduced is Zn + Cu 2+ …….> Zn 2+ + Cu
a. Zn 2+
b. Cu
c. Cu 2+
d. Zn
34. Which statement about concentrated aqueous solution of NaCl is incorrect
a. Na is formed at cathode
b. H2 is liberated from water
c. Cl2 liberated at anode
d. none
35. NH3 bond angle
a. 900
b. 109.5o
c. 1200
d. none
36. Highest oxidation state of metal in the complex is
a. K3[Fe(C2O4)3]
b. Na3[Fe(CN4)6]
c. [NiCl4]
d. none
37. Rate constant of a reaction is 0.05s-1 .half life will be
a. 5s
b. 10s
c. 0.5s
d. none
38. If the rate of reaction is doubled by doubling the concentration of reactants, order of the reaction will be
a. 1st order
b. 2nd order
c. Zero order
d. none
39. Strongest intermolecular interaction is present in :
a. CH4
b. NH3
c. H2O
d. None
40. Geometry of cloroform is
a. pyramidal
b. tetrahedral
c. linear
d. planar
41. Geometry of PF5 is
a. octahedral
b. tetrahedral
c. square pyramidal
d. none
42. sp3d2 hybrridization is associated with which geometry:
a. octahedral
b. square pyramidal
c.tetrahedral
d. none
43. Vander Waals correction of ideal gas is associated with
a. volume of gas particles
b. Pressure of gas container
c. Attraction and repulsion between gas particles
d. none
44. Expression showing the force between electron and proton is:
a. e2/4 pie er2
b. e2/ er2
c. e/4 er2
d. none
45. Highest second ionization energy is for
a. Li
b. Be
c. B
d. none