CHEMISTRY POST UTME PAST QUESTIONS

CHEMISTRY POST UTME PAST QUESTIONS AND ANSWERS

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CHEMISTRY POST UTME

(APP) CHEMISTRY POST UTME

CHEMISTRY POST UTME
Practice with our Post UTME CBT for Universities, Polytechnics, College of Agriculture, College of
Medicine, College of Technology and College of Education and pass your examination.

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Category: CHEMISTRY POST UTME

Calcium atom ionizes by

gaining two electrons

sharing two electrons

gaining two proton

losing two electrons

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The IUPAC names for the compounds CH3COOH and CH2 = CH2 are respectively;

methanoic acid and ethylene

acetic acid and ethene

ethanoic acid and ethene

acetic acid and ethane

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The metal extracted from cassiterite is

sodium

tin

calcium

copper

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The major source of oxides of nitrogen is from the burning of

chlorofluorocarbons

wood

fuel

coal

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Pauli exclusion principle is related to

quantum numbers of electrons

reversibility of equilibrium reactions

collision theory of reactions rate

electronegativity values of elements

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An element X forms the following compounds with chlorine: XCl4, XCl3, XCl2. This illustrate the

law of chemical proportions

law of multiple proportions

law of definite proportions

law of conservation of mass

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The percentage of water of crystallization in ZnSO4. 7H2O is

44%

87%

55%

33%

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Organic Chemistry is the branch of Chemistry that deals with ------- and ------

Carbon & Hydrogen

Hydrogen & oxygen

Carbon & Carbon

Carbon & Sulphur

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Category: CHEMISTRY POST UTME

The principal constituents of natural gas is

propane

butane

methane

ethane

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A current of 4.0 amperes was passed through copper (II) tetraoxosulphate (IV) solution for one hour using copper electrodes. What was the mass of copper deposited? (Cu =64, IF = 96500C)

6.4g

4.8g

3.2g

96

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The greenhouse effect is a climatic condition associated with the presence of excess

NH3

CO2

H2S

NO

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Which quantum number divides shells into orbitals?

magnetic

spin

azimuthally

Principal

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Organic molecules that have the suffix-ene are unsaturated hydrocarbons that have

a triple bond

an ionic bond

double bond

a single bond

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Which of the following properties increases down a group in the Periodic Table

electron affinity

ionization energy

electronegativity

atomic radius

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Cotton is almost pure

starch

protein

cellulose

animal fibre

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At 25oC and 1atm, a gas occupies a volume of 1.50dm3. What volume will it occupy at 100 oC and 1atm?

6.00dm3

18.80dm3

60.0dm3

1.88dm3

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Category: CHEMISTRY POST UTME

Given that the molecular mass of iron is 56 and that of oxygen is 16, how many moles of iron (III) oxide will be contained in 1kg of the compound?

25moles

12.5moles

6.25moles

0.625moles

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What weight of sodium hydroxide is required to make 500cm3 of 0.2M solution?

20g

10g

40g

4g

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Which of the following is an acidic salt?

NaHSO4

Na2SO4

Na2S

CH3CO2Na

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The carbon atoms on ethane are

SP2d hybridized

Sp2 hybridised

SP hybridized

SP3 hybridised

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3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm3 standard flask.25cm3 of this solution required 40.00cm3 of 0.01M HCl for neutralization. What is the percentage by weight of k2CO3 in the mixture? (k = 39, O = 16, C = 12)

89

92

82

72

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Which of the following types of reactions takes place between C2H4 and the halogens?

polymerization

Substitution

Addition

Oxidation

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The weakest attractive force that can be observed between two molecules is

van der waals forces

coordinates

ionic

covalent

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Palm wine turns sour with time because

the sugar content is converted into alcohol

the CO2 formed during the fermentation process has a sour taste

it is commonly adulterated by the tappers and sellers

microbiological activity results in the production of organic acids within it.

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Catalytic hydrogenation of benzene produces

cyclohexane

an aromatic hydrogenation

benzene

margarine

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Which of the following is needed to produce a slag during the extraction of iron in the blast furnace?

cryolite

carbon

sulphur

limestone

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Element P, Q, R and S have 6, 11, 15 and 16 electrons respectively, therefore,

R will form an electrovalent bond with S

P will form an ionic bond with R

Q will form a covalent bond with S

Q will form an electrovalent bond with S

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In the Periodic Table, the elements that lose electrons most readily belong to

group IA

group VIIA

group IIA

group IIIA

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The following are uses of sulphur except

coating of steel to prevent rusting

manufacture of tetraoxosulphate (VI) acid

manufacture of dyes

vulcanization of rubber

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An amphoteric oxide is an

Oxide that is insoluble in water

Oxide that behaves as a base as well as an acid

amorphorous oxide of a metal

amorphorous oxide of a non-metal

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Which of the following halogens is the most reactive?

F2

Br2

I2

Cl2

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A gaseous mixture of 80.0g of oxygen and 56.0g of nitrogen has a total pressure of 1.8atm. The partial pressure of oxygen in the mixture is

1.0atm

0.8atm

1.4atm

1.2atm

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Which of the following is not a member of the homologous series of the paraffins?

C15H32

C24H48

C5H12

C3H8

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Which of the following gases can be collected by the method of downward delivery?

chlorine

hydrogen

ammonia

oxygen

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0.499g of CuSO4.XH2O when heated to constant weight gave a residue of 0.346g. What is the value of X?

5.0

3.0

2.0

4.0

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The oxidation number of chlorine is +1in

Cl2O7

KClO3

NaClO

ZnCl2

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0.0075 mole of calcium trioxocarbonate (iv) is added to 0.015 mole of a solution of HCl. The volume of gas evolved at S.T.P is

100cm3

224cm3

168cm3

112cm3

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A mixture of sugar and sulphur can be separated by

evaporation, dissolution in water and filtration

dissolution in water, filtration and evaporation

dissolution in water, evaporation and filtration

filtration, evaporation and dissolution in water

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When a solution of silver (I) nitrate is saturated with hydrogen sulphide, a black precipitate forms which is

Ag2S

H2S

HNO3

PbS

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Which of the following substances increases in mass when heated in air?

copper (ii)oxide

magnessium ribon

sodium chloride

iodine crystals

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The following uses radioactive isotopes except for

dating elements

sterilization of medical equipment

determining equilibrium positions

tracing reaction paths

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The following are uses of sulphur except

vulcanization of rubber

coating of steel to prevent rusting

manufacture of dyes

manufacture of tetraoxosulphate (VI) acid

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Esterification of propane 1, 2, 3-triol and unsaturated higher carboxylic acids will produce

soap

alkanols

fats

methyl propanoate

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Equilibrium is sad to be attained in a reversible reaction when

all the reactants have been used up

all the products have been formed

the rate of forward and backward reactions are equal

there is no further change in temperature

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Alkanals can be differentiated from alkanones by reaction with

2, 4 – dinitrophenylhydrazine

hydrogen cyanide

sodium hydrogen sulphite

Tollen’s reagent

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Lucas reagent is used to test for

alkanols

alkanes

alkanoic acids

amines

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The greenhouse effect is a climatic condition associated with the presence of excess

NO

CO2

NH3

H2S

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Category: CHEMISTRY POST UTME

The molecular formula of a common organic laboratory anesthetic is

CHCl3

CHF3

CCl4

CHI3

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Copper metal dissolves in concentrated trioxonitrate (v) acid with the resultant evolution of

CO

CO2

SO2

NO2

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Category: CHEMISTRY POST UTME

The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as

Brownian motion

evaporation

liquefaction

Zig Zag Motion

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