JAMB CHEMISTRY PAST QUESTIONS

JAMB CHEMISTRY PAST QUESTIONS

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1 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

An element used in the production of matches is

aluminium

copper

nitrogen

sulphur

2 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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Diamond cannot be used

As dies for drawing wires

As abrasives

In making bicycle chains

In cutting glass and metals

3 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The colour of litmus in an alkaline medium is

Pink

Yellow

Red

Blue

4 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

2-methylprop-1-ene is an isomer of

pent-2-ene

2-methyl but-1-ene

but-2-ene

3-methyl but-1-ene

5 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

66%

50%

40%

25%

6 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

200 cm³ of a gas at 25^oC exerts a pressure of 700 mmHg. Calculate its pressure if its volume increase 350 cm³ at 75^oC.

342.53 mmHg

1430.54 mmHg

467.11 mmHg

400.00 mmHg

7 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

In the production of soap, concentrated sodium chloride solution is added to

saponify the soap

decrease the solubility of the soap

emulsify the soap

increase the solubility of soap

8 / 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 and iv only

i and ii only

i, ii, iii and iv only

i only

9 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following statements does not show Rutherford's account of Nuclear Theory? An atom contains a region

which is very large and in which close to 98% of projectiles pass undeflected

which contains protons and neutrons

which is positively charged

which is massive and can cause deflection of a few projectiles

10 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

A mixture is different from a compound because

a mixture can be represented by a chemical formula while a compound cannot

the properties of a compound are those of its individual constituents while those of a mixture differ from its constituents

a mixture is always homogeneous while a compound is not

the constituent of a compound are chemically bound together while those of a mixture are not

11 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

high pressures and high temperatures

low pressures and lower temperatures

low pressure and high temperatures

low temperatures and high pressures

12 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

substitution reaction

oxidation reaction

addition reaction

hydrogenation reaction

13 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

A liquid that will dissolve fat is

water

calcium hydrochloride

hydrochloric acid

kerosene

14 / 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

degradation

polymerization

cracking

disintegration

15 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the noble gases has the greatest ionization energy

16 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

an alkaline solution

a saturated solution

an acidic solution

a buffer solution

17 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the activities is commonly used as a nuclear fuel

thorium

palladium

actium

uranium

18 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following properties is not peculiar to matter?

Kinetic energy of particles increases from solid to gas

Random motion of particles increases from liquid to gas

Random motion of particles increases from gas to solid

Orderliness of particles increases from gas to liquid

19 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

In the discovery of protein, the instrument used is

glass tube and discharge tube

discharge tube with central cathode

cathode ray tube

discharge tube with terminal cathode

20 / 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

R will form an electrovalent bond with S

Q will form a covalent bond with S

P will form an electrovalent bond with R

21 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The compounds CH₃CH₂CHO and CH₃COCH₃ can be distinguished from each other using

Sodium hydroxide solution

Benedict's solution

Dilute ammonia

Tollen's reagent

22 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Tin is unaffected by air at ordinary temperature due to its

Low melting point

White lustrous appearance

High boiling point

Weak electropositive character

23 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

coal

wood

chlorofluorocarbons

fuel

24 / 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

Zinc

Sodium

Manganese

25 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of these require crystallization most?

Paint making

Perfume making

Drug making

Cement making

26 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Tartaric acid is used industrially to

dry substance

remove rust

make fruit juice

make baking powder

27 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The energy value of petrol can be determined by

Fractionating column

Thermometer

Bomb calorimeter

Catalytic cracker

28 / 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

Blue

Red

Purple

Orange

29 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

phenol

toluene

xylene

aniline

30 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Ammonium chloride can be separated from its mixture with common salt by

Distillation

Sublimation

Decantation

Evaporation

31 / 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]

0.10

10.80

10.00

0.05

32 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Flow of current in electrolytes is due to the movement of

holes and electron

Electrons

Charges

Ions

33 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

During the electrolysis of copper II sulphate between platinum electrodes, if litmus solution is added to the anode compartment

the litmus turns red and oxygen is evolved

the litmus turns blue and hydrogen is evolved

the litmus turns blue but no gas is evolved

the litmus turns blue and oxygen is evolved

34 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of these alloys contains copper?

bronze

solder

steel

permallory

35 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

When salt loses its water of crystallization to the atmosphere on exposure, the process is said to be

déliquescence

efflorescence

fluorescence

effervescence

36 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Rare gases are suitable because they

are volatile gases

form ions easily

have duplet or octet electronic configuration in the outermost shells in their atoms

are monoatomic

37 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Iron is often galvanized in order to

Protect it against corrosion

Render it passive

Make it more malleable

Remove the impurities unit

38 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

Reforming

Resonance

Isotopy

Isomerism

39 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

carbon IV oxide

hydrogen sulphur

ozone

chlorine

40 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Which of the following metals burns with brick red

41 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Vulcanization involve the removal of

the double bond

a polymer

monometer

the single bond

42 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Atomicity of ozone is

43 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

A second alkanol can be oxidized to give an

alkanoic acid

alkyne

alkanone

alkanal

44 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

To what temperature must a gas at 273k be heated in order to double both its volume and pressure?

819K

298K

546K

1092K

45 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The tincture of iodine means iodine dissolved in

ethanol

chlorine water

bromine chloride

water

46 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

Epson salt

Limestone

Urea

Clay

47 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

ΔH is positive and T Δ S is negative

ΔH is zero and T Δ S is positive

ΔH is positive and TΔ S is zero

ΔH is negative and TΔ S is zero

48 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The filter in the cigarette reduce the nicotine construct by

absorption

evaporation

absorption

burning

49 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

They are members of same homologous series

They have different number of carbon atoms

They have the same chemical properties

They have the same boiling points

50 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Cast iron is used in making

Stoves and cookers

Nails and iron rods

Iron sheets and retort stand

Chains and agricultural implements

51 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

There are basic particles from which matter called be made except

Atom

Ion

Molecule

Salt

52 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

Ethanol is soluble in water due to the presence of a

Carbonyl group

Phenyl group

Hydroxyl group

Methyl group

53 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The above orbital diagram shown the electronic configuration of

neon

calcium

chlorine

nitrogen

54 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

The ionic radii of metals are usually

less than their atomic radii

greater than their atomic radii

unaffected by the charge on the ion

the same as their atomic radii

55 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

According to the Kinetic Theory an increase in temperature causes the kinetic energy of particles to

decrease

remain constant

increase

be zero

56 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

An isomer of C₅H₁₂ is

2–methyl propane

2–methyl butane

butane

2–ethyl butane

57 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

Calcium

Beryllium

Magnesium

Strontium

58 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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

Calcium

Iron

Sodium

Magnesium

59 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

P1V1 = P2V2 supports ?

Charles’s law

Avogadro’s law

Boyles’s law

Graham’s law

60 / 60

Category: JAMB CHEMISTRY PAST QUESTIONS

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 period have the same number of valence electrons

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

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