1. Which items correctly complete the following statment?
A catalyst can act in a chemical reaction to:
(I) increase the equilibrium constant.
(II) lower the activation energy.
(III) decrease E for the reaction.
(IV) provide a new path for the reaction.
(a) only I & II
(b) only II & III
(c) only III & IV
(d) only I & III
(e) only II & IV
2. Which of the following has a trigonal planar shape
A. NH3
B. PCl3
C. H2O
D. None of the above
3. Some metals are found in the uncombined free state while other metals are found in the combined state. What is a deciding factor?
(a) Metals with negative reduction potentials can occur in the free state while metals with positive reduction potentials occur in the combined state.
(b) The active metals can occur in the free state while the less active metals occur in the combined state.
(c) Metals with positive reduction potentials can occur in the free state while metals with negative reduction potentials can occur in the combined state.
(d) There is no way we can predict which metals will be free or combined.
(e) none of the above
4. The Hall-Heroult process is used in the production of:
(a) Mg
(b) Fe
(c) Al
(d) Au
(e) Cu
5. Which metal can be found as the free element?
(a) Na
(b) Mn
(c) Fe
(d) Cr
(e) Pt
6. In the process known as ‘roasting,’ a(n) _ is chemically converted to a(n) _.
(a) sulfide; oxide
(b) carbonate; oxide
(c) hydroxide; oxide
(d) oxide; sulfate
(e) phosphate; phosphide
7. The most abundant metal in the earth’s crust is:
(a) Cu
(b) Fe
(c) Na
(d) Al
(e) Ca
8. Which of the following halogens has the lowest electropositivity?
A. Chlorine
B. Iodine
C. Fluorine
D. Bromine
9. If the electronegativity difference between elements X and Y is zero, the bond between their atoms is?
A. Covalent
B. Electrovalent
C. Coordinate
D. Metallic
10. The charge to mass ratio of electrons was determined by
A. RA MIKIKAN
B. Niels Bohr
C. Ernest Rutherford
D. JJ Thomson
SET 3:
1. NH3 + H3O+ => NH4+ + H2O
Which of the following statements is correct about the above rxn?
A. NH3 acts as an acid
B. NH4+ acts as a base
C. H3O+ acts as an acid
D. H3O+ acts as a base
2. Which of the following is not a suitable method of preparing simple salt?
A. Hydrogenation
B. Neutralization
C. Double decomposition
D. Reaction of an acid with a metal
3. Which of the following is/are correct
I. pH = -log(H+)
II. pH = log(1/H+)
III. pH = -log(OH-)
IV. pOH = log(1/OH-)
A. Only I and IV
B. only I and II
C. I, II, AND IV
D. I, III and IV
4. Which of the following remains unchanged when heated in hydrogen?
A. PbO
B. Fe2O3
C. CuO
D. ZnO
5. Which of the following metals reacts with steam reversibly only when red hot?
A. Copper
B. Iron
C. Calcium
D. Sodium
6. What’s the catalyst used in lead chamber process for the production of sulphuric acid
A. Vanadium V oxide
B. Manganese dioxide
C. Manganese tetraoxide
D. Nickel
E. None of the above
7. Which of the following gases will rekindle a brightly splint?
A. NO2
B. NO
C. N2O
D. CL2
8. What’s the product of ostwald process?
A. Nitric acid
B. Sulphuric acid
C. Ammonia.
D. Hydrochloric acid
9. Why is helium preferred to hydrogen in filling balloons?
A. Exhibits isotopy
B. Is a component of water
C. Is diatomic
D. Is inflammable
10. The intermolecular force present in water is?
A. Hydrogen bond
B. Covalent bond
C. Dative bond
D. Ionic bond
Chemistry morning
1). Which of the following is a physical change?
A. Exposing white phosphorus to air
B. Burning kerosene
C. Dissolving calcium in water
D. Freezing ice cream
2). Sulphur exists in six forms in the solid state. This property is known as
A. Isomerism
B. Allotropy
C. Isotopy
D. Isomorphism
3). Which of the following gases contains the least number of atoms at s.t.p?
A. 1 mole of butane
B. 4 moles of chlorine
C. 3 moles of ozone
D. 7 moles of argon
4). Which important nitrogen-containing compound is produced in Haber’s process?
A. NH3
B. NO2
C. NO
D. HNO3
5). Elements in the periodic table are arranged in the order of their
A. atomic numbers
B. metallic character
C. mass number
D. relative atomic mass
6). The two ions responsible for hardness in water are
A. Ca2+ and / or Mg2+
B. K+ and / or Mg2+
C. Ca2+ and / or Li+
D. Ca2+ and / or Na+
7). The electronic configuration of element Z is 1s² 2s² 2p⁶ 3s² 3p¹. What is the formula of the compound formed between Z and tetraoxosulphate (VI) ion.
A. Z3(SO4)2
B. ZSO4
C. Z2 SO4
D. Z2(SO4)3
8). The hybridization in the compound CH3−CH2−C≡H is
A. sp³ and sp
B. sp
C. sp²
D. sp³ and sp²
9). A cell shorthand notation can be written as A / A+ // B2+ /B. The double slash in the notation represents the
A. electrolyte
B. electrodes
C. salt bridge
D. solid – liquid interface
10). The shapes of water, ammonia, carbon (iv) oxide and methane are respectively
A. linear, tetrahedral, angular and pyramidal
B. angular, pyramidal, linear and tetrahedral
C. pyramidal, linear, tetrahedral and angular
D. tetrahedral, angular, pyramidal and linear
10). Methane is prepared in the laboratory by heating a mixture of sodium ethanoate with soda lime. The chemical constituent(s) of soda lime is/are
A. Ca(OH)2 and NaOH
B. Na2CO3
C. NaCl
D. NaOH
Where is OAU headquarters located
What is ombudsman
How many era of constitution do we have
Govt
1.the word sovereignty refers to
2.in the yoruba precolonial system who is the right hand of the alaafin A.AremoB. IwarefaC.Onaefa
3.A person who has lived in a country for sometime can claim citizenship by A.honoraryB.obligation C.registrationD.naturalization
4. An interest group which is said to be influence in government policies is called
5.ECOMOG refers to
6.what is the full meaning of ECOWAS
7.Capitalism is to
8.which of the regime introduced structural Adjus
tment Programme
1. The prophet that was sent to david after the sin he committed with Bathsheba
2.Gods covenant with Abraham is called A.rainbow B.circumcision
3.The man who told naaman to go deep himself into the river jordan
4.which of the disciples where the first four Jesus called
5.what was the name given to barnabas and paul after the healed the cripple man at lystra
6.what did Jesus said when he was told about his friend lazarus sick
7.what where the hebrew woman bless with Pls this is all what I can remember
here’s what I remember
which is used in the production of styrenea. etheneb. ethanec. ethyne d. ethanol
isomers can’t be found by a. branching b. existence as member of another homologous family c. positioning of multiple bonds d. positioning of triple bondse
thyne is used as a. anaesthesia
b. production of detergent c. ripening agents d.
production of PVC
About Author
