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

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

2.0

5.0

3.0

4.0

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Category: CHEMISTRY POST UTME

Which of the following halogens is the most reactive?

Cl2

F2

Br2

I2

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Category: CHEMISTRY POST UTME

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

acetic acid and ethane

acetic acid and ethene

ethanoic acid and ethene

methanoic acid and ethylene

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Category: CHEMISTRY POST UTME

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

H2S

NO

NH3

CO2

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Category: CHEMISTRY POST UTME

The following are uses of sulphur except

vulcanization of rubber

manufacture of tetraoxosulphate (VI) acid

coating of steel to prevent rusting

manufacture of dyes

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Category: CHEMISTRY POST UTME

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

CO2

NO2

CO

SO2

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Category: CHEMISTRY POST UTME

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

law of multiple proportions

law of chemical proportions

law of definite proportions

law of conservation of mass

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Category: CHEMISTRY POST UTME

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

H2S

NO

CO2

NH3

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Category: CHEMISTRY POST UTME

Which quantum number divides shells into orbitals?

magnetic

Principal

spin

azimuthally

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Category: CHEMISTRY POST UTME

Which of the following is an acidic salt?

NaHSO4

CH3CO2Na

Na2S

Na2SO4

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Category: CHEMISTRY POST UTME

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

Carbon & Sulphur

Carbon & Carbon

Hydrogen & oxygen

Carbon & Hydrogen

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Category: CHEMISTRY POST UTME

Pauli exclusion principle is related to

electronegativity values of elements

collision theory of reactions rate

quantum numbers of electrons

reversibility of equilibrium reactions

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Category: CHEMISTRY POST UTME

Lucas reagent is used to test for

amines

alkanoic acids

alkanols

alkanes

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Category: CHEMISTRY POST UTME

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

soap

alkanols

methyl propanoate

fats

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Category: CHEMISTRY POST UTME

An amphoteric oxide is an

amorphorous oxide of a non-metal

Oxide that behaves as a base as well as an acid

amorphorous oxide of a metal

Oxide that is insoluble in water

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Category: CHEMISTRY POST UTME

The oxidation number of chlorine is +1in

Cl2O7

ZnCl2

NaClO

KClO3

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Category: CHEMISTRY POST UTME

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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Category: CHEMISTRY POST UTME

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

electron affinity

atomic radius

ionization energy

electronegativity

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Category: CHEMISTRY POST UTME

The metal extracted from cassiterite is

copper

calcium

sodium

tin

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

P will form an ionic bond with R

Q will form an electrovalent bond with S

R will form an electrovalent bond with S

Q will form a covalent bond with S

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Alkanals can be differentiated from alkanones by reaction with

Tollen’s reagent

hydrogen cyanide

sodium hydrogen sulphite

2, 4 – dinitrophenylhydrazine

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Category: CHEMISTRY POST UTME

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

copper (ii)oxide

iodine crystals

magnessium ribon

sodium chloride

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Category: CHEMISTRY POST UTME

The following are uses of sulphur except

manufacture of tetraoxosulphate (VI) acid

manufacture of dyes

coating of steel to prevent rusting

vulcanization of rubber

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Category: CHEMISTRY POST UTME

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

group VIIA

group IIIA

group IIA

group IA

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Category: CHEMISTRY POST UTME

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)

72

82

89

92

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Category: CHEMISTRY POST UTME

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

Addition

Oxidation

Substitution

polymerization

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The following uses radioactive isotopes except for

tracing reaction paths

dating elements

determining equilibrium positions

sterilization of medical equipment

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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

liquefaction

evaporation

Brownian motion

Zig Zag Motion

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

40g

20g

10g

4g

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Category: CHEMISTRY POST UTME

Cotton is almost pure

starch

protein

animal fibre

cellulose

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Category: CHEMISTRY POST UTME

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

168cm3

112cm3

100cm3

224cm3

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Calcium atom ionizes by

losing two electrons

sharing two electrons

gaining two electrons

gaining two proton

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Category: CHEMISTRY POST UTME

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

coordinates

van der waals forces

ionic

covalent

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Category: CHEMISTRY POST UTME

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

60.0dm3

1.88dm3

6.00dm3

18.80dm3

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Category: CHEMISTRY POST UTME

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

sulphur

carbon

cryolite

limestone

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

oxygen

hydrogen

ammonia

chlorine

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Catalytic hydrogenation of benzene produces

cyclohexane

benzene

margarine

an aromatic hydrogenation

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Category: CHEMISTRY POST UTME

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

55%

33%

87%

44%

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Category: CHEMISTRY POST UTME

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

1.4atm

1.2atm

0.8atm

1.0atm

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Category: CHEMISTRY POST UTME

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)

3.2g

4.8g

6.4g

96

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Category: CHEMISTRY POST UTME

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

C3H8

C15H32

C24H48

C5H12

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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?

0.625moles

12.5moles

6.25moles

25moles

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Category: CHEMISTRY POST UTME

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

fuel

wood

chlorofluorocarbons

coal

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Category: CHEMISTRY POST UTME

The carbon atoms on ethane are

Sp2 hybridised

SP3 hybridised

SP2d hybridized

SP hybridized

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Category: CHEMISTRY POST UTME

Palm wine turns sour with time because

it is commonly adulterated by the tappers and sellers

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

the sugar content is converted into alcohol

the CO2 formed during the fermentation process has a sour taste

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Category: CHEMISTRY POST UTME

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

a triple bond

a single bond

double bond

an ionic bond

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Category: CHEMISTRY POST UTME

Equilibrium is sad to be attained in a reversible reaction when

there is no further change in temperature

all the products have been formed

the rate of forward and backward reactions are equal

all the reactants have been used up

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Category: CHEMISTRY POST UTME

A mixture of sugar and sulphur can be separated by

dissolution in water, evaporation and filtration

dissolution in water, filtration and evaporation

evaporation, dissolution in water and filtration

filtration, evaporation and dissolution in water

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Category: CHEMISTRY POST UTME

The molecular formula of a common organic laboratory anesthetic is

CCl4

CHCl3

CHI3

CHF3

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Category: CHEMISTRY POST UTME

The principal constituents of natural gas is

ethane

propane

methane

butane

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