CHEMISTRY POST UTME

CHEMISTRY POST UTME

Practice the Chemistry Post UTME for Universities, Polytechnics
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1 / 50

Category: CHEMISTRY POST UTME

Equilibrium is sad to be attained in a reversible reaction when

there is no further change in temperature

the rate of forward and backward reactions are equal

all the reactants have been used up

all the products have been formed

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Category: CHEMISTRY POST UTME

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

oxygen

hydrogen

chlorine

ammonia

3 / 50

Category: CHEMISTRY POST UTME

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

55%

44%

87%

33%

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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

Calcium atom ionizes by

gaining two proton

gaining two electrons

losing two electrons

sharing two electrons

6 / 50

Category: CHEMISTRY POST UTME

The molecular formula of a common organic laboratory anesthetic is

CCl4

CHF3

CHCl3

CHI3

7 / 50

Category: CHEMISTRY POST UTME

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

NH3

NO

CO2

H2S

8 / 50

Category: CHEMISTRY POST UTME

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

ionization energy

atomic radius

electron affinity

electronegativity

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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?

1.88dm3

60.0dm3

18.80dm3

6.00dm3

10 / 50

Category: CHEMISTRY POST UTME

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

sodium chloride

magnessium ribon

copper (ii)oxide

iodine crystals

11 / 50

Category: CHEMISTRY POST UTME

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

carbon

limestone

sulphur

cryolite

12 / 50

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

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

0.625moles

6.25moles

14 / 50

Category: CHEMISTRY POST UTME

The following are uses of sulphur except

vulcanization of rubber

coating of steel to prevent rusting

manufacture of dyes

manufacture of tetraoxosulphate (VI) acid

15 / 50

Category: CHEMISTRY POST UTME

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

Ag2S

HNO3

H2S

PbS

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Category: CHEMISTRY POST UTME

The following uses radioactive isotopes except for

dating elements

tracing reaction paths

sterilization of medical equipment

determining equilibrium positions

17 / 50

Category: CHEMISTRY POST UTME

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

Carbon & Sulphur

Carbon & Carbon

Carbon & Hydrogen

Hydrogen & oxygen

18 / 50

Category: CHEMISTRY POST UTME

The following are uses of sulphur except

coating of steel to prevent rusting

vulcanization of rubber

manufacture of dyes

manufacture of tetraoxosulphate (VI) acid

19 / 50

Category: CHEMISTRY POST UTME

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

H2S

CO2

NH3

NO

20 / 50

Category: CHEMISTRY POST UTME

The carbon atoms on ethane are

Sp2 hybridised

SP2d hybridized

SP3 hybridised

SP hybridized

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Category: CHEMISTRY POST UTME

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

double bond

a triple bond

a single bond

an ionic bond

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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 conservation of mass

law of multiple proportions

law of chemical proportions

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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 types of reactions takes place between C2H4 and the halogens?

Addition

polymerization

Substitution

Oxidation

25 / 50

Category: CHEMISTRY POST UTME

Which of the following halogens is the most reactive?

F2

I2

Cl2

Br2

26 / 50

Category: CHEMISTRY POST UTME

Cotton is almost pure

cellulose

starch

protein

animal fibre

27 / 50

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

Zig Zag Motion

liquefaction

evaporation

28 / 50

Category: CHEMISTRY POST UTME

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

ethanoic acid and ethene

acetic acid and ethane

acetic acid and ethene

methanoic acid and ethylene

29 / 50

Category: CHEMISTRY POST UTME

Which quantum number divides shells into orbitals?

magnetic

spin

Principal

azimuthally

30 / 50

Category: CHEMISTRY POST UTME

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

covalent

ionic

van der waals forces

coordinates

31 / 50

Category: CHEMISTRY POST UTME

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

wood

coal

fuel

chlorofluorocarbons

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Category: CHEMISTRY POST UTME

Which of the following is an acidic salt?

CH3CO2Na

NaHSO4

Na2S

Na2SO4

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Category: CHEMISTRY POST UTME

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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Category: CHEMISTRY POST UTME

The metal extracted from cassiterite is

copper

sodium

tin

calcium

35 / 50

Category: CHEMISTRY POST UTME

Alkanals can be differentiated from alkanones by reaction with

sodium hydrogen sulphite

Tollen’s reagent

hydrogen cyanide

2, 4 – dinitrophenylhydrazine

36 / 50

Category: CHEMISTRY POST UTME

Pauli exclusion principle is related to

quantum numbers of electrons

collision theory of reactions rate

electronegativity values of elements

reversibility of equilibrium reactions

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Category: CHEMISTRY POST UTME

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

soap

fats

alkanols

methyl propanoate

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Category: CHEMISTRY POST UTME

An amphoteric oxide is an

amorphorous oxide of a metal

amorphorous oxide of a non-metal

Oxide that is insoluble in water

Oxide that behaves as a base as well as an acid

39 / 50

Category: CHEMISTRY POST UTME

The principal constituents of natural gas is

methane

butane

ethane

propane

40 / 50

Category: CHEMISTRY POST UTME

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

C15H32

C3H8

C5H12

C24H48

41 / 50

Category: CHEMISTRY POST UTME

Catalytic hydrogenation of benzene produces

benzene

margarine

an aromatic hydrogenation

cyclohexane

42 / 50

Category: CHEMISTRY POST UTME

Lucas reagent is used to test for

alkanoic acids

amines

alkanols

alkanes

43 / 50

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)

89

82

92

72

44 / 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 sugar content is converted into alcohol

the CO2 formed during the fermentation process has a sour taste

45 / 50

Category: CHEMISTRY POST UTME

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

Q will form an electrovalent bond with S

R will form an electrovalent bond with S

P will form an ionic bond with R

Q will form a covalent bond with S

46 / 50

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

47 / 50

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

224cm3

112cm3

100cm3

48 / 50

Category: CHEMISTRY POST UTME

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

group IIA

group IIIA

group IA

group VIIA

49 / 50

Category: CHEMISTRY POST UTME

The oxidation number of chlorine is +1in

ZnCl2

KClO3

Cl2O7

NaClO

50 / 50

Category: CHEMISTRY POST UTME

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

20g

4g

40g

10g

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CHEMISTRY POST UTME

CHEMISTRY POST UTME

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