CHEMISTRY POST UTME PAST QUESTIONS

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CHEMISTRY POST UTME PAST QUESTIONS AND ANSWERS

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CHEMISTRY POST UTME

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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)

6.4g

96

3.2g

4.8g

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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

112cm3

224cm3

100cm3

168cm3

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Category: CHEMISTRY POST UTME

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

40g

10g

20g

4g

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Category: CHEMISTRY POST UTME

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

electron affinity

electronegativity

ionization energy

atomic radius

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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

dissolution in water, evaporation and filtration

evaporation, dissolution in water and filtration

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Category: CHEMISTRY POST UTME

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

ionic

covalent

van der waals forces

coordinates

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Category: CHEMISTRY POST UTME

The molecular formula of a common organic laboratory anesthetic is

CHF3

CHI3

CHCl3

CCl4

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Category: CHEMISTRY POST UTME

Which of the following is an acidic salt?

NaHSO4

Na2S

CH3CO2Na

Na2SO4

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Category: CHEMISTRY POST UTME

The oxidation number of chlorine is +1in

NaClO

ZnCl2

Cl2O7

KClO3

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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

25moles

6.25moles

12.5moles

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Category: CHEMISTRY POST UTME

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

group IIA

group IA

group VIIA

group IIIA

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Category: CHEMISTRY POST UTME

Alkanals can be differentiated from alkanones by reaction with

hydrogen cyanide

sodium hydrogen sulphite

2, 4 – dinitrophenylhydrazine

Tollen’s reagent

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Category: CHEMISTRY POST UTME

The metal extracted from cassiterite is

sodium

tin

calcium

copper

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Category: CHEMISTRY POST UTME

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

an ionic bond

a triple bond

a single bond

double bond

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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)

82

89

92

72

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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?

18.80dm3

60.0dm3

6.00dm3

1.88dm3

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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

P will form an ionic bond with R

R will form an electrovalent bond with S

Q will form an electrovalent bond with S

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Category: CHEMISTRY POST UTME

Pauli exclusion principle is related to

reversibility of equilibrium reactions

collision theory of reactions rate

quantum numbers of electrons

electronegativity values of elements

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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

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

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

Substitution

polymerization

Oxidation

Addition

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Category: CHEMISTRY POST UTME

Equilibrium is sad to be attained in a reversible reaction when

the rate of forward and backward reactions are equal

all the reactants have been used up

there is no further change in temperature

all the products have been formed

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Category: CHEMISTRY POST UTME

Catalytic hydrogenation of benzene produces

an aromatic hydrogenation

benzene

margarine

cyclohexane

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Category: CHEMISTRY POST UTME

Which of the following halogens is the most reactive?

Cl2

I2

Br2

F2

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Category: CHEMISTRY POST UTME

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

87%

33%

44%

55%

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Category: CHEMISTRY POST UTME

The following uses radioactive isotopes except for

tracing reaction paths

sterilization of medical equipment

determining equilibrium positions

dating elements

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

methanoic acid and ethylene

ethanoic acid and ethene

acetic acid and ethane

acetic acid and ethene

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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

Zig Zag Motion

evaporation

Brownian motion

liquefaction

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Category: CHEMISTRY POST UTME

The principal constituents of natural gas is

propane

methane

butane

ethane

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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

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

carbon

cryolite

limestone

sulphur

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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

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

Lucas reagent is used to test for

alkanes

alkanols

alkanoic acids

amines

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Category: CHEMISTRY POST UTME

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

NH3

H2S

CO2

NO

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Category: CHEMISTRY POST UTME

The following are uses of sulphur except

manufacture of dyes

manufacture of tetraoxosulphate (VI) acid

coating of steel to prevent rusting

vulcanization of rubber

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Category: CHEMISTRY POST UTME

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

magnessium ribon

copper (ii)oxide

sodium chloride

iodine crystals

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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

0.8atm

1.0atm

1.2atm

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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

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

fats

soap

alkanols

methyl propanoate

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Category: CHEMISTRY POST UTME

Cotton is almost pure

cellulose

starch

protein

animal fibre

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Category: CHEMISTRY POST UTME

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

fuel

chlorofluorocarbons

coal

wood

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Category: CHEMISTRY POST UTME

The following are uses of sulphur except

coating of steel to prevent rusting

manufacture of dyes

manufacture of tetraoxosulphate (VI) acid

vulcanization of rubber

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Category: CHEMISTRY POST UTME

An amphoteric oxide is an

Oxide that behaves as a base as well as an acid

amorphorous oxide of a non-metal

Oxide that is insoluble in water

amorphorous oxide of a metal

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Category: CHEMISTRY POST UTME

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

chlorine

ammonia

oxygen

hydrogen

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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

3.0

5.0

4.0

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Category: CHEMISTRY POST UTME

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

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

it is commonly adulterated by the tappers and sellers

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Category: CHEMISTRY POST UTME

Which quantum number divides shells into orbitals?

Principal

azimuthally

spin

magnetic

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Category: CHEMISTRY POST UTME

Calcium atom ionizes by

gaining two proton

losing two electrons

sharing two electrons

gaining two electrons

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CHEMISTRY POST UTME PAST QUESTIONS

CHEMISTRY POST UTME PAST QUESTIONS AND ANSWERS

CHEMISTRY POST UTME

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