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

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

Cotton is almost pure

starch

cellulose

protein

animal fibre

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Category: CHEMISTRY POST UTME

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

hydrogen

ammonia

chlorine

oxygen

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Category: CHEMISTRY POST UTME

The molecular formula of a common organic laboratory anesthetic is

CHCl3

CHI3

CCl4

CHF3

5 / 50

Category: CHEMISTRY POST UTME

A mixture of sugar and sulphur can be separated by

filtration, evaporation and dissolution in water

dissolution in water, filtration and evaporation

evaporation, dissolution in water and filtration

dissolution in water, evaporation and filtration

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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

HNO3

H2S

Ag2S

PbS

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Category: CHEMISTRY POST UTME

The carbon atoms on ethane are

SP2d hybridized

SP hybridized

Sp2 hybridised

SP3 hybridised

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Category: CHEMISTRY POST UTME

Catalytic hydrogenation of benzene produces

cyclohexane

margarine

benzene

an aromatic hydrogenation

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Category: CHEMISTRY POST UTME

Equilibrium is sad to be attained in a reversible reaction when

all the reactants have been used up

the rate of forward and backward reactions are equal

all the products have been formed

there is no further change in temperature

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Category: CHEMISTRY POST UTME

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

Oxidation

Addition

Substitution

polymerization

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Category: CHEMISTRY POST UTME

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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Category: CHEMISTRY POST UTME

The metal extracted from cassiterite is

copper

calcium

sodium

tin

13 / 50

Category: CHEMISTRY POST UTME

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

55%

44%

33%

87%

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Category: CHEMISTRY POST UTME

The following are uses of sulphur except

manufacture of dyes

vulcanization of rubber

manufacture of tetraoxosulphate (VI) acid

coating of steel to prevent rusting

15 / 50

Category: CHEMISTRY POST UTME

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

cryolite

sulphur

carbon

limestone

16 / 50

Category: CHEMISTRY POST UTME

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

CO

NO2

CO2

SO2

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Category: CHEMISTRY POST UTME

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

covalent

ionic

van der waals forces

coordinates

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Category: CHEMISTRY POST UTME

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

group IIIA

group IIA

group VIIA

group IA

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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 definite proportions

law of multiple proportions

law of chemical proportions

law of conservation of mass

20 / 50

Category: CHEMISTRY POST UTME

Palm wine turns sour with time because

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

it is commonly adulterated by the tappers and sellers

the CO2 formed during the fermentation process has a sour taste

the sugar content is converted into alcohol

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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

evaporation

liquefaction

Zig Zag Motion

Brownian motion

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Category: CHEMISTRY POST UTME

The oxidation number of chlorine is +1in

KClO3

NaClO

Cl2O7

ZnCl2

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Category: CHEMISTRY POST UTME

Alkanals can be differentiated from alkanones by reaction with

Tollen’s reagent

sodium hydrogen sulphite

hydrogen cyanide

2, 4 – dinitrophenylhydrazine

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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?

12.5moles

6.25moles

25moles

0.625moles

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Category: CHEMISTRY POST UTME

Calcium atom ionizes by

gaining two proton

sharing two electrons

losing two electrons

gaining two electrons

26 / 50

Category: CHEMISTRY POST UTME

The following are uses of sulphur except

coating of steel to prevent rusting

vulcanization of rubber

manufacture of tetraoxosulphate (VI) acid

manufacture of dyes

27 / 50

Category: CHEMISTRY POST UTME

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

acetic acid and ethene

ethanoic acid and ethene

acetic acid and ethane

methanoic acid and ethylene

28 / 50

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?

1.88dm3

6.00dm3

60.0dm3

18.80dm3

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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?

3.0

2.0

5.0

4.0

30 / 50

Category: CHEMISTRY POST UTME

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

C5H12

C15H32

C3H8

C24H48

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Category: CHEMISTRY POST UTME

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

CO2

NO

H2S

NH3

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Category: CHEMISTRY POST UTME

The principal constituents of natural gas is

methane

butane

ethane

propane

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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

96

6.4g

4.8g

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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

1.2atm

0.8atm

1.4atm

1.0atm

35 / 50

Category: CHEMISTRY POST UTME

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

ionization energy

atomic radius

electronegativity

electron affinity

36 / 50

Category: CHEMISTRY POST UTME

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

chlorofluorocarbons

coal

fuel

wood

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Category: CHEMISTRY POST UTME

Lucas reagent is used to test for

alkanols

alkanoic acids

alkanes

amines

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Category: CHEMISTRY POST UTME

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

39 / 50

Category: CHEMISTRY POST UTME

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

10g

20g

40g

4g

40 / 50

Category: CHEMISTRY POST UTME

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

a single bond

double bond

an ionic bond

a triple bond

41 / 50

Category: CHEMISTRY POST UTME

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

Q will form a covalent bond with S

Q will form an electrovalent bond with S

P will form an ionic bond with R

R will form an electrovalent bond with S

42 / 50

Category: CHEMISTRY POST UTME

Which of the following is an acidic salt?

Na2S

CH3CO2Na

Na2SO4

NaHSO4

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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

100cm3

224cm3

168cm3

112cm3

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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)

92

72

89

82

45 / 50

Category: CHEMISTRY POST UTME

Which of the following halogens is the most reactive?

F2

Br2

Cl2

I2

46 / 50

Category: CHEMISTRY POST UTME

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

NH3

CO2

NO

H2S

47 / 50

Category: CHEMISTRY POST UTME

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

copper (ii)oxide

magnessium ribon

iodine crystals

sodium chloride

48 / 50

Category: CHEMISTRY POST UTME

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

fats

soap

alkanols

methyl propanoate

49 / 50

Category: CHEMISTRY POST UTME

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

Carbon & Sulphur

Hydrogen & oxygen

Carbon & Carbon

Carbon & Hydrogen

50 / 50

Category: CHEMISTRY POST UTME

Which quantum number divides shells into orbitals?

spin

azimuthally

Principal

magnetic

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