1. The alpha (α-) scattering experiment is synonymous with _____
A. J. J. Thomson
B. Ernest Rutherford
C. James Chadwick
D. Henry Mosley
2. Isotopes of hydrogen differ from one another in _____
A. atomic number
B. number of protons
C. number of electrons
D. number of neutrons
3. Which of the following is the reason why CCl4 is non-polar?
A. The polar bonds cancel each other.
B. The molecule is non-linear.
C. The molecule is covalent.
D. Small electronegativity difference between C and Cl.
4. When a proton and an electron beam are subjected to the same strong electric field, the electron beam is deflected at a greater angle than the proton beam because _____
A. electron beam has a negative charge while proton beam has a positive charge
B. an electron is heavier than a proton
C. the electron is lighter than the proton
D. an electron has more electrical energy than a proton
5. Which of these electronic configurations belong to an element in period 3 of the periodic table?
A. [Ne] 3s1
B. 1s2
C. [He] 2s2 2p3
D. [Ar] 4s2 3d3
6. Which of the following is the best evidence of the presence of ionic bonding in an unknown substance? The substance conducts electricity _____
A. in the solid state and in aqueous solution
B. when molten and in aqueous solution
C. in the solid state and when molten
D. when molten but not in the solid state
7. Fucoserratene, a hydrocarbon usually identified as the sexual pheromone of the brown seaweed Fucus serratus has an empirical formula of C2H3. If the experimentally determined molecular weight of this substance is 108 g/mol, the molecular formula of fucoserratene is _____
A. 𝐶4𝐻6
B. 𝐶6𝐻9
C. 𝐶8𝐻12
D. 𝐶10𝐻15
8. In a chemical reaction, the heat change at constant pressure is referred to as _____
A. Entropy
B. Enthalpy
C. Gibbs free energy
D. Bond energy
9. Which of the following is used as detector for radiations from nuclear processes?
A. Cyclotron
B. Particle accelerator
C. Geiger counter
D. Electron volts system
10. Equal numbers of moles of He(g), Ar(g), and Ne(g) are placed in a glass vessel at room temperature. If the vessel has a pinhole-sized leak, which of the following will be true regarding the relative values of the partial pressures of the gases remaining in the vessel after some of the gas mixture has effused?
A. PHe > PNe > PAr
B. PAr > PNe > PHe
C. PNe > PAr > PHe
D. PAr > PHe > PNe
11. A solid which contains more than one type of bonding is _____
A. Ice
B. Diamond
C. Iron
D. Calcium oxide
12. All the following will exhibit common ion effect except _____
A. addition of sodium acetate to a solution of acetic acid.
B. addition of sodium chromate to a saturated solution of lead chromate.
C. addition of hydrochloric acid to a saturated solution of silver chloride.
D. addition of hydrochloric acid to a saturated solution of silver nitrate.
13. Water gas is a mixture of two gases namely _____
A. 𝐶𝑂 𝑎𝑛𝑑 𝑁𝑂
B. 𝐶𝑂2 𝑎𝑛𝑑 𝐻2
C. 𝐶𝑂 𝑎𝑛𝑑 𝐻2
D. 𝐶𝑂 𝑎𝑛𝑑 𝐻2𝑂
14. The following statements are properties of group 17 elements except.
A. They have a valency of -1
B. They belong to the p-block of the periodic table
C. They are all non-metals
D. They are all reducing agents with Fluorine having the highest reducing power
15. The highest oxidation number of iodine is _____
A. -1
B. 0
C. +5
D. +7
16. Which of the following inter-halogen compound below does not exist?
A. ClBr3
B. IF3
C. ClF5
D. ICl3
17. Which group of particles is in order of increasing size?
A. N, O, F
B. N3- , O2–, F–
C. Na+, Mg2+, Al3+
D. Na+, Ne, F–
18. Chlorine react with methane in the presence of sunlight through a process known as free radical reaction, which equation represents the propagation step?
A. CH4 + Cl → CH3 + HCl
B. CH3 + CH3 → C2H6
C. CH3 + Cl → CH3Cl
D. Cl2 → 2Cl
19. The IUPAC name of the compound CH≡C-CH2-CH2-COOH is _____
A. 1-pentyn-4-oic acid
B. pentyn-1-oic acid
C. 5-pentyn-1-oic acid
D. pent-4-yn-1-oic acid
20. The hybridization of the carbon atom in ethyne is _____
A. sp4
B. sp
C. sp3
D. sp2
21. How many isomers are possible for a hydrocarbon with molecular formula C4H8?
A. two
B. three
C. four
D. six
22. Which of the following chemical equations represents the reaction of group 1 metal hydrides (MH) with water?
A. MH + H2O → MO + 3H
B. MH + H2O → MOH + H2
C. MH + H2O → MOH + 2H
D. MH + H2O → M + OH + H2
23. What type of reaction occurs between propene and concentrated hydrogen bromide solution to produce a mixture of 2-bromopropane and 1-bromopropane?
A. Addition
B. Substitution
C. Elimination
D. Displacement
24. The product of oxidation of secondary alcohol with K2Cr2O7/H+ is a/an _____
A. carboxylic acid
B. ester
C. aldehyde
D. a ketone
25. How many isomeric forms are there for the molecular formula C3H6Br2?
A 4
B 1
C 2
D 3
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