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Chemistry Past Questions

Study and practice Chemistry past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.

4,306 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10

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4,306 questions

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Question 1061

waec 2007

Which of the following properties is characteristic of the halogens?

AAbility to accept electrons readily

BAbility to donate electrons readily

CAbility to from basic oxides

DFormation of coloured compounds

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Question 1062

waec 2007

Which of the following statements about rare gases are correct?

ATheir outermost shells are fully filled

BThey are generally unreactive

CTheir outermost shells are partially filled

DThey have lone pair of

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Question 1063

waec 2007

When sodium atom form the ion Na+,

Ait gains one proton

Bit achieves a noble gas configuration

Cits atomic number increases

Dit gains one electron

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Question 1064

jamb 2007

Use the diagram above to answer the question below:

The alternative raw material labelled M is

Acarbon

Bsteam

Coxygen

Dnatural gas

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Question 1065

jamb 2007

Use the diagram above to answer the question below:

The fuel gas labelled L is

Awater gas

Bhydrogen

Cnitrogen

DCarbon(IV) oxide

View Explanation & Discuss

Question 1066

jamb 2007

Which of the compounds above is a tertiary alkanol?

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Question 1067

jamb 2007

What weight of NaCl is needed to make 2.0 dm³ of a 1.5M solution?
[Na = 23, Cl = 35.5]

A116 g

B175 g

C87 g

D58 g

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Question 1068

jamb 2007

Smog usually occurs over cities which

Aburn a lot of fossil fuels

Bhave very few plants

Care surrounded by water

Dare overpopulated

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Question 1069

jamb 2007

A good drying agent should be

Adeliquescent

Beffervescent

Chygroscopic

Defflorescent

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Question 1070

jamb 2007

The presence of nitrogen in air is to slow down

Arespiration and combustion

Bcombustion and corrosion

Ccorrosion and respiration

Drespiration and transpiration

View Explanation & Discuss

Question 1071

jamb 2007

A supersaturated solution is said to contain

Amore solute than it can dissolve at that temperature in the presence of undissolved solute

Bas much solute as it can dissolve at that temperature in the presence of undissolved solute

Cas much solute as it can dissolve at that temperature

Dmore solute than it can dissolve at that temperature

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Question 1072

jamb 2007

When temporary hard water is boiled for sometime in a kettle, the inner surface of the kettle becomes coated with a deposit of

Acalcium tetraoxosulphate(VI)

Bcalcium trioxocarbonate (IV)

Ccalcium hydrogentrioxocarbonate (IV)

Daluminium trioxocarbonate (IV)

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Question 1073

jamb 2007

The IUPAC nomenclature of compound CH\(_3\)CH\(_2\)COOCH\(_2\)CH\(_3\) is

Apropyl ethanoate

Bethyl butanoate

Cethyl propanoate

Dmethyl butanoate

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Question 1074

jamb 2007

Certain useful waxes are composed mainly of

Aamino acids

Bglycerols

Calkanols

Dalkanoates

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Question 1075

jamb 2007

Which of the following alkanes has the highest boiling point?

APentane

BEthane

CPropane

DMethane

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Question 1076

jamb 2007

The conversion of open chain alkanes into cycloalkanes and aromatic compounds is called

Acracking

Breforming

Cisomerization

Dpolymerization

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Question 1077

jamb 2007

How many structural isomers of chlorobutane are possible?

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Question 1078

jamb 2007

The hydrocarbon used in the production of styrene is

Aethyne

Bpropyne

Cethane

Dethene

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Question 1079

jamb 2007

Which of the following compounds is the best possible anti-knock agent for petrol?

A(CH₃)₂CH - CH(CH₃)CH₂CH₃

BCH₃CH₂(CH₃)CHCH₂CH₂CH₃

CCH₃CH₂(CH₃)CHCH₂CH₂CH₃

D(CH₃)₃C - CH₂CH₂CH₃

View Explanation & Discuss

Question 1080

jamb 2007

CH\(_3\)CH\(_2\)Cl + KCN → CH\(_3\)CH\(_2\)CN + KCl

In the reaction above, the cyanide is

Ahydrophobic

Bhydrophilic

Cnucleophilic

Delectrophilic

View Explanation & Discuss

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