JAMB CHEMISTRY PAST QUESTIONS

JAMB CHEMISTRY PAST QUESTIONS

JAMB CHEMISTRY PAST QUESTIONS

Attempt all 60 questions picked from our pool past questions. You have 1 hour to answer all 60 questions.

You can retake the exam again and again

Goodluck

1 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the activities is commonly used as a nuclear fuel

palladium

uranium

thorium

actium

2 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The derivative of benzene that can be used in making explosives is

phenol

toluene

aniline

xylene

3 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following metals burns with brick red

4 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The tincture of iodine means iodine dissolved in

ethanol

chlorine water

water

bromine chloride

5 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Sieving is a technique used to separate mixtures containing solid particles of

large sizes

small sizes

different sizes

the same size

6 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

If the molecular mass of tetraoxosulphate (VI) acid is 98, calculate its vapour density.

196

106

7 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following metals is the most essential in the regulation of blood volume, blood pressure and osmotic equilibrium?

Iron

Manganese

Zinc

Sodium

8 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

A synthetic rubber is obtained from the polymerization of

neoprene

butandiene

propylene

isoprene

9 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The Sulphide which is insoluble in dilute hydrochloric acid is

ZnS

Na2S

CuS

FeS

10 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The reaction of halogens in the presence of sunlight is an example of

oxidation reaction

substitution reaction

hydrogenation reaction

addition reaction

11 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Aluminium hydroxide is used in the dyeing industry as a

dye

salt

mordant

dispersant

12 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

A given mass of gas occupies 2dm³ at 300k. At what temperature will its volume be doubled, keeping the pressure constant?

480k

600k

400k

550k

13 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

In a neutralization reaction involving HCI and NaOH using litmus as indicator, the colour at the end point is

Purple

Orange

Blue

Red

14 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called

electrovalent bond

co-ordinate bond

covalent bond

ionic bond

15 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Flow of current in electrolytes is due to the movement of

Electrons

Charges

holes and electron

Ions

16 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Tin is unaffected by air at ordinary temperature due to its

High boiling point

Weak electropositive character

White lustrous appearance

Low melting point

17 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The filter in the cigarette reduce the nicotine construct by

absorption

burning

evaporation

absorption

18 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

A liquid that will dissolve fat is

kerosene

calcium hydrochloride

water

hydrochloric acid

19 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Burning magnesium ribbon in air removes which of the following

(i) oxygen (ii) nitrogen (iii) argon and (iv) carbon(iv)oxide?

i, ii, iii and iv only

i and iv only

i and ii only

i only

20 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following does not support the fact that air is a mixture?

none of the above

the constituents of air are in a fixed proportion by mass

it cannot be represented with a chemical formula

the constituents of air can be separated by physical by physical means

21 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

In electrovalency, the oxidation number of the participating metal is always

decreasing

increasing

constant

neutral

22 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with

23 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The above orbital diagram shown the electronic configuration of

neon

nitrogen

chlorine

calcium

24 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Hydrogen can be displaced from a lot alkaline solution by

25 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following statements is correct about the periodic table?Which of the following statements is correct about the periodic table?

The non-metallic properties of the elements tend to decrease across each period

Elements in the same group have the same number of electron shells

The valence electrons of the elements increase progressively across the period

Elements in the same period have the same number of valence electrons

26 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

A suitable reagent for distinguish between ethanoic and ethanol is

bromine water

sodium hydrogen trioxocarbonate (iv)

fehling’s solution

ammoniacal silver trioxonitrate(V)

27 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as

disintegration

polymerization

cracking

degradation

28 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The enzyme used in the hydrolysis of starch to dextrin and maltose is

diastatse

invertase

zymase

amylase

29 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Calculate the amount in moles of silver deposited when 9650C of electricty is passed through a solution of silver salt [= 96500 Cmol^-1]

10.00

10.80

0.05

0.10

30 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Cast iron is used in making

Chains and agricultural implements

Stoves and cookers

Nails and iron rods

Iron sheets and retort stand

31 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

There are basic particles from which matter called be made except

Atom

Molecule

Salt

Ion

32 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

When ΔH is negative, a reaction is said to be

exothermic

endothermic

ionic

reversible

33 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following metals cannot replace hydrogen from water or steam?

Calcium

Magnesium

Iron

Sodium

34 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

A substance that is used as a ripening agent for fruits is

propane

ethene

methane

butane

35 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the compounds is composed of Al, Si, O and H?

Urea

Limestone

Epson salt

Clay

36 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The arrangement of particles in crystal lattices can be studied using

α-rays

γ-rays

X-rays

β-rays

37 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following statements about catalyst is false?

catalyst reduce the activation energy for a reaction

catalysts do not alter the mechanism of the reaction and never appear in the rate low

biological catalysts are called enzymes

catalyst do not appear in the balanced equation

38 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following statements is true about 2-methylpropane and butane

They have different number of carbon atoms

They have the same boiling points

They are members of same homologous series

They have the same chemical properties

39 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The ability of carbon to form long chains is referred to as

Catenation

Alkylation

Carbonation

Acylation

40 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The gas that is most useful in protecting humans against solar marathon is

chlorine

hydrogen sulphur

ozone

carbon IV oxide

41 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is

Phosphorus-32

Carbon-14

Iodine-131

Cobalt-60

42 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

A second alkanol can be oxidized to give an

alkyne

alkanoic acid

alkanone

alkanal

43 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Cathode rays cause an object placed behind a perforated anode to cast a shadow on the screen. This observation shows that the rays

travel in straight lines

have mass

are positively charged

are negatively charged

44 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The principle of column chromatography is based on th ability of the constituents to

React with each other in the solvent in the column

Dissolve in each other in the column

React with the solvent in the column

Move at different speeds in the column

45 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The ideal gas laws and equations are true for all gases at

low pressures and lower temperatures

low pressure and high temperatures

high pressures and high temperatures

low temperatures and high pressures

46 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The salt formed from a weak acid and a strong base hydrolyzes in water to form

a saturated solution

an alkaline solution

an acidic solution

a buffer solution

47 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

What is the percentage of sulphur in sulphur (IV) oxide?

66%

50%

25%

40%

48 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following properties is not peculiar to matter?

Random motion of particles increases from liquid to gas

Orderliness of particles increases from gas to liquid

Kinetic energy of particles increases from solid to gas

Random motion of particles increases from gas to solid

49 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

A major source of oxide of oxygen is from the burning of

coal

wood

chlorofluorocarbons

fuel

50 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following statements is correct about the periodic table?

Elements in the same period have the same number of valence electrons

The non-metallic Properties of the elements tend to decrease across each period

Elements in the same group have the same number of electron shells

The valence electrons of the elements in the same period increase progressively across the period

51 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The situation obtained when a perfect gas expands into a vacuum is

ΔH is negative and TΔ S is zero

ΔH is positive and TΔ S is zero

ΔH is zero and T Δ S is positive

ΔH is positive and T Δ S is negative

52 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The process that occurs when two equivalent forms of a compound are in equilibrium is

Isomerism

Isotopy

Reforming

Resonance

53 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The elements in the periodic table are listed in order of increasing

atomic mass

nuclear charge

relative atomic number

relative isotopic mass

54 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The energy value of petrol can be determined by

Thermometer

Fractionating column

Bomb calorimeter

Catalytic cracker

55 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following alkaline metals react more quickly spontaneously with water?

Strontium

Magnesium

Calcium

Beryllium

56 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The colour of litmus in an alkaline medium is

Yellow

Blue

Pink

Red

57 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,

Q will form an electrovalent bond with S

P will form an electrovalent bond with R

R will form an electrovalent bond with S

Q will form a covalent bond with S

58 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Iron is often galvanized in order to

Make it more malleable

Protect it against corrosion

Remove the impurities unit

Render it passive

59 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Vulcanization involve the removal of

the single bond

the double bond

a polymer

monometer

60 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The leachate of a certain ash is used in local soap because it contain

sodium hydroxide

soluble carbonates and hydrogen carbonate

potassium hydroxide

sodium chloride and potassium hydroxide

Your score is

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