CHEMISTRY POST UTME

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

Category: CHEMISTRY POST UTME

Which quantum number divides shells into orbitals?

magnetic

spin

Principal

azimuthally

2 / 50

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

3 / 50

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

1.0atm

0.8atm

1.2atm

1.4atm

4 / 50

Category: CHEMISTRY POST UTME

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

group VIIA

group IA

group IIIA

group IIA

5 / 50

Category: CHEMISTRY POST UTME

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

copper (ii)oxide

iodine crystals

sodium chloride

magnessium ribon

6 / 50

Category: CHEMISTRY POST UTME

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

sulphur

cryolite

carbon

limestone

7 / 50

Category: CHEMISTRY POST UTME

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

hydrogen

oxygen

chlorine

ammonia

8 / 50

Category: CHEMISTRY POST UTME

Alkanals can be differentiated from alkanones by reaction with

Tollen’s reagent

2, 4 – dinitrophenylhydrazine

hydrogen cyanide

sodium hydrogen sulphite

9 / 50

Category: CHEMISTRY POST UTME

The principal constituents of natural gas is

methane

ethane

butane

propane

10 / 50

Category: CHEMISTRY POST UTME

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

HNO3

Ag2S

H2S

PbS

11 / 50

Category: CHEMISTRY POST UTME

Which of the following halogens is the most reactive?

F2

Cl2

I2

Br2

12 / 50

Category: CHEMISTRY POST UTME

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

33%

44%

87%

55%

13 / 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

evaporation

Zig Zag Motion

liquefaction

Brownian motion

14 / 50

Category: CHEMISTRY POST UTME

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

acetic acid and ethene

acetic acid and ethane

ethanoic acid and ethene

methanoic acid and ethylene

15 / 50

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

there is no further change in temperature

all the products have been formed

16 / 50

Category: CHEMISTRY POST UTME

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

double bond

a single bond

an ionic bond

a triple bond

17 / 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?

6.00dm3

18.80dm3

1.88dm3

60.0dm3

18 / 50

Category: CHEMISTRY POST UTME

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

NO

CO2

H2S

NH3

19 / 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)

92

89

82

72

20 / 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

100cm3

112cm3

168cm3

224cm3

21 / 50

Category: CHEMISTRY POST UTME

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

alkanols

fats

soap

methyl propanoate

22 / 50

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

23 / 50

Category: CHEMISTRY POST UTME

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

atomic radius

electron affinity

ionization energy

electronegativity

24 / 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)

96

4.8g

3.2g

6.4g

25 / 50

Category: CHEMISTRY POST UTME

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

NO

NH3

CO2

H2S

26 / 50

Category: CHEMISTRY POST UTME

Which of the following is an acidic salt?

Na2S

Na2SO4

CH3CO2Na

NaHSO4

27 / 50

Category: CHEMISTRY POST UTME

The molecular formula of a common organic laboratory anesthetic is

CHI3

CHCl3

CCl4

CHF3

28 / 50

Category: CHEMISTRY POST UTME

The following are uses of sulphur except

vulcanization of rubber

manufacture of dyes

coating of steel to prevent rusting

manufacture of tetraoxosulphate (VI) acid

29 / 50

Category: CHEMISTRY POST UTME

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 a covalent bond with S

R will form an electrovalent bond with S

Q will form an electrovalent bond with S

30 / 50

Category: CHEMISTRY POST UTME

An amphoteric oxide is an

Oxide that is insoluble in water

amorphorous oxide of a non-metal

Oxide that behaves as a base as well as an acid

amorphorous oxide of a metal

31 / 50

Category: CHEMISTRY POST UTME

The following are uses of sulphur except

manufacture of dyes

coating of steel to prevent rusting

vulcanization of rubber

manufacture of tetraoxosulphate (VI) acid

32 / 50

Category: CHEMISTRY POST UTME

Calcium atom ionizes by

gaining two electrons

gaining two proton

losing two electrons

sharing two electrons

33 / 50

Category: CHEMISTRY POST UTME

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

Addition

Substitution

Oxidation

polymerization

34 / 50

Category: CHEMISTRY POST UTME

The carbon atoms on ethane are

SP3 hybridised

SP hybridized

Sp2 hybridised

SP2d hybridized

35 / 50

Category: CHEMISTRY POST UTME

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

ionic

covalent

van der waals forces

coordinates

36 / 50

Category: CHEMISTRY POST UTME

Cotton is almost pure

protein

cellulose

animal fibre

starch

37 / 50

Category: CHEMISTRY POST UTME

Catalytic hydrogenation of benzene produces

benzene

an aromatic hydrogenation

cyclohexane

margarine

38 / 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

39 / 50

Category: CHEMISTRY POST UTME

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

Carbon & Sulphur

Hydrogen & oxygen

Carbon & Carbon

Carbon & Hydrogen

40 / 50

Category: CHEMISTRY POST UTME

Lucas reagent is used to test for

alkanoic acids

amines

alkanes

alkanols

41 / 50

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 conservation of mass

law of definite proportions

42 / 50

Category: CHEMISTRY POST UTME

Pauli exclusion principle is related to

quantum numbers of electrons

reversibility of equilibrium reactions

electronegativity values of elements

collision theory of reactions rate

43 / 50

Category: CHEMISTRY POST UTME

The following uses radioactive isotopes except for

determining equilibrium positions

tracing reaction paths

dating elements

sterilization of medical equipment

44 / 50

Category: CHEMISTRY POST UTME

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

SO2

NO2

CO2

CO

45 / 50

Category: CHEMISTRY POST UTME

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

10g

40g

4g

20g

46 / 50

Category: CHEMISTRY POST UTME

A mixture of sugar and sulphur can be separated by

filtration, evaporation and dissolution in water

evaporation, dissolution in water and filtration

dissolution in water, evaporation and filtration

dissolution in water, filtration and evaporation

47 / 50

Category: CHEMISTRY POST UTME

The metal extracted from cassiterite is

tin

copper

calcium

sodium

48 / 50

Category: CHEMISTRY POST UTME

The oxidation number of chlorine is +1in

Cl2O7

NaClO

KClO3

ZnCl2

49 / 50

Category: CHEMISTRY POST UTME

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

C24H48

C3H8

C15H32

C5H12

50 / 50

Category: CHEMISTRY POST UTME

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

wood

chlorofluorocarbons

fuel

coal

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