FPSC Chemistry paper ( 5-10-2020)
1. First law of thermodynamic is
a. dE = -q + PV
b. dE = q + w
c. dE = q – w
d. none
2. Thermodynamics is reversible when
a. System and surrounding remain in equilibrium
b. System and surrounding exchange into each other
c. When there is no boundary between system and surrounding
d. none
3. Atomic bomb is based on the principle of
a. Atomic fission
b. Atomic fusion
c. Radioactivity
d. None
4. Chemical name of baking soda is
a. Sodium nitrate
b. Sodium carbonate
c. Sodium bicarbonate
d. None
5. When hydronium ion is formed from hydrogen ion and water, which bond is formed
a. ionic bond
b. covalent bond
c. coordinate covalent bond
d. none
6. Which oxide is more acidic among the following
a. Phosphorous(V)oxide
b. sulphur(IV) oxide
c. chlorine (I) oxide
d. None
7. Which among following can act both as acid and base
a. HCO3-1
b. CN–
c. SO42-
d. none
8. The addition of NH4Cl to 1.0N solution of NH4OH will effect pH in which way
a. lower the pH
b. raise the pH
c. no effect on the pH
d. first increase then decrease
9. A reversible cycle has entropy change
a. positive
b. negative
c. zero
d. none
10. Nitrogen has greatest oxidation state in
a. NaNO3
b. NH4Cl
c. NaNO2
d. none
11. Number of water molecules needed to convert one molecule of P2O5 into ortho phosphoric acid
a. 1
b. 2
c. 3
d. 4
12. 0.1N solution of NaHCO3 has pH value
a. 5.6
b. 7
c. 8.4
d. 4
13. Bond order of F2 according to MOT is
a. 1
b. 2
c. 4
d. 3
14. Brass is an alloy of
a. Copper + zinc
b. Copper + tin
c. Copper + lead
d. none
15. Which catalyst is used for the reduction of aldehydes into alcohols
a. Zn/HCl
b. LiAlH4
c. H2/Ni
d. None
16. Glass is amorphous characteristic due to
a. crystalline
b. dense liquid
c. super cooled
d. none
17. Which is wrong for polymer
a. low molecular weight
b. High viscosity
c. high molecular weight
d. none
18. First ionization energy value of hydrogen is
a. 285 kJ/mol
b. 850 kJ/mol
c. 1320 kJ/mol
d. none
19. Calculate the pH of 0.1M carbonic acid (Ka = 4.5 * 10-7)
a. 2.7
b. 4
c. 3.7
d. none
20. Energy of electrons emitted by photoelectric method is
a. increase with light frequency
b. independent of intensity of light
c. depends on the frequency of incident light
d. all of above
21. Relationship between azimuthal and magnetic quantum number is given by
a. m = 2l +1
b. m = 2l -1
c. m= 2l/2 +1
d. none
22. Which of the following donot have a linear structure
a. SnCl2
b. CO
c. N2O
d. None
23. How many lone pairs has SF4 , CCL4, XeF4 has?
a. 1 0 2
b. 2 0 1
c. 0 1 1
d. none
24. Which of the following cannot be prepared by Sandmeyers reaction
a. clorobenzene
b. bromobenzene
c. florobenzene
d. none
25. Which of the following has amide linkage
a. protein
b. Nylon 6,6
c. Dimethyl formamide
d. all
26. De-Broglie gave his concept on
a. Schrodinger equation
b. Bohr model
c. Rutherford model
d. none
27. Rutherford used
a. gamma rays on foil
b. beta rays on foil
c. alpha rays on foil
d. none
28. Born Haber process is used to determine
a. electronegativity
b. lattice energy
c. shape of molecule
d. none
29. Radioactive reactions are
a. zero order
b. first order
c. second order
d. none
30. Do the ozonolysis of cyclohexene in the presence of zinc dust. Obtained product is treated with aq KOH. final product will be
a. beta-gamma unsaturated aldehyde
b. alpha-beta unsaturated aldehyde
c. 1,6-hexandial
d. none
31. KNO3 is used as a salt bridge because
a. K+ ion mobility is greater than NO3-
b. NO3- ion mobility is greater than K+
c. both ions have same mobility
d. cannot be used as a salt bridge
32. Unit of rate constant for first order is
a. Ms-1
b. s-1
c. M-1s-1
d. none
33. if total pressure of 1.6g of O2 , 0.4g of N2 and 1.4g of NH3 is 2atm, what will be the partial pressure exerted by the oxygen gas
a. 0.714
b. 0.942
c. 0.249
d. none
34. Maximum bond length is of
a. F2
b. Cl2
c. N2
d. none
35. Pick the wrong statement for carbocation
a. They can attack negative charge
b. They can be rearranged to form stable carbocation
c. It can eliminate an H+ to form an olefin
d. None
36. Ag-Zn cell have Ered = 0.80 and Eoxi= -0.34. Overall cell potential will be
a. 1.59V
b. -1.59V
c. 1.14V
d. None
37. Pick up the thermoplastic polymer
a. natural rubber
b. polyethene
c. dacron
d. none
38. If vapor pressure at 300K is 0.4atm, then by doubling the volume ,what will be the vapor pressure at the same temperature
a. 0.8atm
b. 0.4atm
c. 0.2atm
d. none
39.
a. aaa
b. aaa
c. aaa
d. aaa