SPSC Lecturer MCQS Sample Paper

SPSC Lecturer MCQS Paper Sample

01. Nuclear fusion, like nuclear fission:
(A) is a chain process (B) is exoergic
(C) produces several radioactive products ( D) involves isotopes of heavy nuclei
02. Which of the following spectroscopy uses an energy source of around 70ev?
(A) Mass spectroscopy (B) NMR Spectroscopy (C) IR (D) Atomic absorption
03. If coordination number is 6, the radius ratio is:
(A) 0.155 (B) 0.414 (C) 0.225 (D) 0.7071
04. The geometry and type of hybrid orbital present about the central atom in BF3 is
(A) Linear, is (B) Trigonal planner, sp2 (C) Tetrahedral, sp3
(D) Pyramidal, sp3
05. 30 P15 is unstable because:
(A) its n/p ratio is just 1 (B) it is odd-odd nuclear (C) its Z is odd
(D) it is chemical reactive
06. The structure that remains after an acid has given up proton is called:
(A) conjugate acid (B) conjugate base (C) conjugate salt
(D) conjugate proton
07. In HB3 molecule the H-B-H bond angle is 1200. What kind of hybridization is likely?
(A) sp (B) sp2 (C) sp3 (D) sp3 d
08. The circle temperature of water is higher than 02. because the H20 molecules have
(A) fewer electrons than 02 (B) Two covalent bonds (C) V-shape
(D) Dipole moment
09. When a nucleus emits beta particles, the parent and daughter nuclei are:
(A) Isobars (B) Isotopes (C) Nuclear isomers (D) Isotones
10. The uranium-238 decays to thorium-234 process of :
(A) Alpha radiation (B) Beta radiation (C) Gamma radiation (D) Fission
(E) Fusion
11. If pure P orbitals were used in forming the B-F bonds in BF3, angles 900 would be expected. The actual observed bond angle is 1200. What concept might be useful in explaining the observed angles?
(A) VSEPR theory (B) Ligend field theory (C) M.O theory
(D) Hybridization
12. The complexes that contain less than three d-electrons are
(A) stable (B) inert (C) unstable (D) labile
13. A gas is said to behave like an ideal gas when the relation PV/T = Constant. When do you expect a real gas to behave like ideal gas
(A) when the temperature is low
(B) when both the temperature and pressure are low
(C) when both temperature and pressure are high
(D) when the temperature is high and pressure is low
14 Which of the following units represent the largest amount of energy:
(A) Calorie (B) Joule (C) Erg (D) Electron Volt 15 If in the reaction of Flourine-19 with a neutron, nitrogen-16 is formed, what is the other particle given off in the reactions.
(A) 10H (B) 24He (C) 10C (D) 11H
16. When two cubes are pressed over each other they unite to from one cube. Which of the following force is responsible for holding them together:
(A) Vander wall’ s forces (B) Covalent attraction
(C) Hydrogen bond formation (D) Dipole-dipole interaction
17. If P pure orbitals are used in forming the C –H bond in CH4 angles of 900 would be expected. The observed angles are 1090 each. What concept might be useful in explaining the observed angles?
(A) M.O Theory (B) Ligand field Theory (C) Hybridization
(D) Crystal Field Theory
18. The high polymer of Ethylene is known as:
(A) Polytyene (B) Tyrene (C) Tetralene (D) Polythene
19. The formula of potassium cobaltinitrite is:
(A) K2 [ Co (NO)6 ] (B) K3 [ Co (NO2)6] (C) K [Co (NO2)6] (D) K3 [Co(NO)6] 20. An example of a nonstoichiometric compound
(A) Al2O3 (B) Fe3O4 (C) Ni O2 (D) Pbo
21. The radioactivity due to C-14 isotope (half life 6000 yrs) a sample of wood form an ancient tomb was found to be nearly half of that fresh wood. The tomb is therefore about
(A) 3000 yrs (B) 9000 yrs (C) 6000 yrs (D) 12000 yrs
22. Principal quantum number determines how far from the nucleus the
is to be found
(A) proton (B) neutron (C) electron
23. Elements of s-block all have configmations
(A) ns1/ ns2 (B) ns3 / ns4 (C) ns5 ns
24. Bronsted acid is a proton
(A) accept (B) donor (C) none
25. The distance between the two successive crests or two successive troughs is called
(A) wave – length (B) frequency (C) wave number  Next 25 Questions