Chemistry CBT for JAMB

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Chemistry CBT for JAMB

JAMB Chemistry CBT

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Category: Chemistry CBT for JAMB

Mixing aqueous solution of barium hydroxide and sodium tetraoxocarbonate (iv) yields a white precipitate of

A. Sodium tetraoxocarbonate

B. Barium tetraoxocarbonate

C. Sodium hydroxide

D. Barium oxide

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Category: Chemistry CBT for JAMB

Which of the following will act as both oxidizing agents and reducing agents?

A. H2SO4

B. SO3

C. SO2

D. H2S

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Category: Chemistry CBT for JAMB

What is the shape of a molecule of CCl₄?

A. Trigonal planar

B. linear

C. Pyramid

D. tetrahedral

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Category: Chemistry CBT for JAMB

A sample of gas exerts a pressure of 8.2 atm when confined in a 2.93 dm³ container at 20c. The number of moles of gas in the sample is

A. 4.00

B. 1.00

C. 3.00

D. 2.00

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Category: Chemistry CBT for JAMB

Consecutive members of an alkane homologous series differ by

A. CH

B. CH2

C. CnH2n+2

D. CH3

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Category: Chemistry CBT for JAMB

The flame used by welders in cutting metals is

A. butane gas flame

B. acetylene flame

C. oxyhydrogen flame

D. kerosene flame

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Category: Chemistry CBT for JAMB

A gas sample with an initial volume of 3.25 dm³ is heated and allowed to expand to 9.75 dm³ at constant pressure. What is the ratio of the final absolute temperature to the initial absolute temperature?

A. 5:4

B. 8:3

C. 5:2

D. 3:1

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Category: Chemistry CBT for JAMB

Which of the following conducts electricity?

A. Sulphur

B. Red phosphorous

C. Diamond

D. Graphite

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Category: Chemistry CBT for JAMB

A certain liquid has a high boiling point. It is viscous, non-toxic, and miscible with water to be hygroscopic; this liquid most likely to be

A. CH3CH2CH2CH2OH

B. CH3CH2CHOH3

C. CH3CH2CH2CH2OH3

D. CH3OHCHOH2OH

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Category: Chemistry CBT for JAMB

Which of the following substances is not a homogeneous mixture?

A. writing ink

B. A. filtered sea water

C. flood water

D. soft drinks

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Category: Chemistry CBT for JAMB

Silver chloride turns gray when exposed to sunlight because

A. he silver ion is reduced to silver

B. silver is transition metal

C. the silver io is oxidized to silver

D. the silver chloride forms complexes in the sun

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Category: Chemistry CBT for JAMB

which of these compounds exhibits resonance

A. benzene

B. butyne

C. ethanol

D. propene

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Category: Chemistry CBT for JAMB

Some copper (ll) sulphate pentahydrate (CuSO₄ 5H₂O), was heated at 120 ^oC with the following results. Wt of crucible = 10.00 g; Wt of crucible + CuSO₄ 5H₂O =14.98g; Wt of crucible + residue = 13.54 g. How many molecules of water of crystalization were lost?

[H = 1, Cu = 63.5, O = 16, S = 32

A. 2

B. 1

C. 3

D. 4

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Category: Chemistry CBT for JAMB

A metal which can be used as sacrificial anode for preventing corrosion of length of iron pipe is

A. magnesium

B. silver

C. copper

D. lead

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Category: Chemistry CBT for JAMB

X is crystalline salt of sodium. Solution of X in water turns litmus red produces a gas which turns lime water milky when added to sodium carbonate. With barium chloride solution, X gives a white precipitate which is insoluble in dilute hydrochloric acid. X is

A. Na2SO4

B. NaHCO3

C. NaHSO4

D. Na2SO3

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Category: Chemistry CBT for JAMB

3.6g of Mg was to 100cm3 of 1moldm3 H2SO4 what mass of Mg remained Undissolved ?

A. 2.4g

B. 0.24g

C. 0.36g

D. 3.6g

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Category: Chemistry CBT for JAMB

Copper (II) tetraoxosulphate (IV) is widely used as

A. fertilizer

B. Disinfectant

C. fungicide

D. purifier

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Category: Chemistry CBT for JAMB

A sample of gas with an initial volume of 2.5 dm³ is heated and then allowed to expand to 7.5 dm³ at constant at pressure. What is the ratio of the final temperature of the initial absolute temperature?

A. 1:3

B. 3:1

C. 2:5

D. 5:2

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Category: Chemistry CBT for JAMB

A piece of radioactive element has initially 8.0×10^22 atoms. The half life of two days after 16 days the number of atom is

A. 25×10^21

B. 5×10^21

C. 25×10^22

D. 5×10^22

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Category: Chemistry CBT for JAMB

A metal which can be used as sacrificial anode for preventing corrosion of length of iron pipe is

A. Lead

B. Magnesium

C. Copper

D. Silver

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Category: Chemistry CBT for JAMB

Which of the following is used as a moderator to control nuclear fission?

A. Iron

B. Chromium

C. Heavy water

D. Lead

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Category: Chemistry CBT for JAMB

The removal of rust from iron by treatment with tetraoxosulphate (vi) acid is based on the

A. Dehydration of the iron

B. Hydrolysis of the iron

C. Oxidation of the rust

D. Reaction of acid with base

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Category: Chemistry CBT for JAMB

Ethene, when passed into concentrated H2SO4, is rapidly absorbed. The product is diluted with water and then warmed to produce

A. Ethanol

B. diethyl ether

C. ethanal

D. diethyl sulphate

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Category: Uncategorized

Which of the following is stable to heat

A. K2 CO3

B. (NH4) 2 SO4

C. NaHCO3

D. Ag NH3

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Category: Chemistry CBT for JAMB

Calcium forms complexes with ammonia because

A. it is a transition metal

B. it has empty d-orbital

C. it forms colourless compounds

D. it is an s-block element

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Category: Chemistry CBT for JAMB

6g of Mg was to 100cm3 of 1 moldm3 H2 SO4 . What mass of Mg remained undissolved? (Mg = 24)

A. 3.6g

B. 0.36g

C. 0.24g

D. 2.4g

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Category: Chemistry CBT for JAMB

A quantity of air passed through a weighted amount of alkaline pyrogallol. An increase in the weight of the pyrogallol would result from the absorption of

A. nitrogen

B. argon

C. oxygen

D. neon

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Category: Chemistry CBT for JAMB

What is the shape of a molecule of CCI?

A. linear

B. Pyramid

C. Trigonal planar

D. tetrahedral

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Category: Chemistry CBT for JAMB

The alkanol obtained from the production of soap is

A. methanol

B. ethanol

C. propanol

D. glycerol

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Category: Chemistry CBT for JAMB

The boiling point of water, ethanol, toulene and butan-2-ol are 373.0k, 351.3k, 383.6k and 372.5k respectively, which liquid has the highest vapour pressure at 323.0k

A. water

B. ethanol

C. butan-2-ol

D. toluene

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Category: Chemistry CBT for JAMB

Which of the following does NOT contain aluminum as a component?

A. Over-head cables

B. Container for caustic soda

C. Container for trioxonitrate (v) acid

D. Duralumin

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Category: Chemistry CBT for JAMB

Chlorine is a common bleaching agent. This is not true with

A. most wet fabric dyes

B. printers ink

C. wet pawpaw leaf

D. wet litmus paper

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Category: Chemistry CBT for JAMB

A certain volume of gas at 298k is heated such that its volume and pressure are now four times the original values. What is the new temperature?

A. 1192.0k

B. 298.0k

C. 4768.0k

D. 100.0k

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Category: Chemistry CBT for JAMB

Which of the following increases as boiling water changes to steam?

A. Temperature of the system

B. number of molecule

C. Activation energy

D. degree of disorder of the system

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Category: Chemistry CBT for JAMB

One of the active components of baking powder is

A. MgSO4

B. NaHCO3

C. NaCl

D. CaSO4

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Category: Chemistry CBT for JAMB

A. convert rubber from thermosetting to thermo plastics polymer

B. break down rubber polyer

C. from chains which bind rubber molecules together

D. act as catalyst for the polymerization of rubber molecules

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Category: Chemistry CBT for JAMB

Which of the following will precipitate in dil. HCl

A. Cu S

B. Na2 S

C. Fe S

D. ZnS

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Category: Chemistry CBT for JAMB

Which of the following compound is NOT the correct formed compound when the parent metal is heated in air?

A. tri-iron tetraoxide (Fe2O)

B. Copper (II) oxide (CuO)

C. Calcium oxide

D. Sodium oxide ( Na2O )

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Category: Chemistry CBT for JAMB

30 cm³ of oxygen at 10 atmosphere pressure is placed in a 20 dm³ container. Calculate the new pressure if the temperature is kept constant.

A. 66.0 atm

B. 6.0 atm

C. 6.7 atm

D. 6.7 atm

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Category: Chemistry CBT for JAMB

There is a large temperature interval between the melting point and the boiling point of metal because:

A. the crystal lattice of metal is easily broken

B. metals conduct heat very rapidly

C. metals have a very high melting point melting does not break the metallic bond but boiling does

D. melting does not break the metallic bond but boiling does

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General objectives of chemistry in JAMB

The purpose of the Chemistry Unified Tertiary Matriculations Examination (UTME) syllabus, is to prepare candidates for examination by the Board. The design aims to test the achievement of course objectives.

To understand the basic principles and concepts of chemistry.
interpret scientific data on chemistry;
infer the relationship between chemistry and other sciences;
apply the knowledge of chemistry to industry and daily life;

What JAMB seeks to test in Chemistry

JAMB syllabus for Chemistry seeks to test the achievement of course objectives. Candidates must be able to answer all the questions as according to JAMB syllabus. The topics to prepare for are in the JAMB Chemistry syllabus.

Note: Our tutors at the Tutorial Center, who happen to be authorities in the field, picked the answers, while we pulled the questions from JAMB past questions.

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The role of this Chemistry CBT Quiz

This Chemistry CBT for JAMB aims to assist students in properly preparing for the examination. Since the examination is now a Computer Based Test, it will be ideal for students to practice as though they are in the examination hall.
We pull our questions from JAMB Past Questions. We have a repository of over 1500 past questions in chemistry to help you score above 300 in your examination. Additionally, the questions are based on the syllabus of JAMB for chemistry.

How to use this free CBT Quiz

To use this JAMB Chemistry CBT, you do not need any formal computer education. All you need is your mobile phone that has access to the internet. Sign Up or Register to have access. Pick the right answer from the options lettered A – D and click on NEXT. Click on Previous to make corrections. Upon completion, click on See Scores. We will automatically generate your score.. You will see how you performed in terms of right or wrong answers.

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