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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.

2,505 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10

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2,505 questions

Question 1 of 20 2,505 total questions

Question 381

jamb 2015

All these are electromagnetic waves except

AWhite light

BPhoton

CX-ray

DInfrared

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Question 382

jamb 2015

Which of these radioactive elements is commonly used as a nuclear fuel

Auranium

Bpalladium

Cactium

Dthorium

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Question 383

jamb 2015

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

Acoal

Bwood

Cfuel

Dchlorofluorocarbons

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Question 384

jamb 2015

Rare gases are stable because they

Aare monoatomic

Bform ions easily

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

Dare volatile gases

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Question 385

jamb 2015

Which of the following types of alkanols undergo oxidation to produce alkanoic acids.

I. Primary alkanols
II. Secondary alkanols
III. Tertiary alkanols

AI, II and III

BI and II only

CIII only

DI only

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Question 386

jamb 2015

Hydrogen can be displaced from a hot alkaline solution by

AFe

BCu

CCa

DSn

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Question 387

jamb 2015

Which of the following ions requires the largest quantity of electricity for discharge at an electrode?

A2.0 mole of Q3⁺

B2.5 mole of R2⁺

C3.0 mole of T^-

D4.0 mole of Y^-

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Question 388

jamb 2015

A fixed mass of gas occupies 92cm3 at 3°C. What will be its volume at 18C if the pressure remains constant?

A15.3cm³

B87.3cm³

C2.0cm³

D97.0cm³

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Question 389

jamb 2015

P1V1 = P2V2 supports ?

ACharles’s law

BBoyles’s law

CGraham’s law

DAvogadro’s law

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Question 390

jamb 2015

Tartaric acid is used industrially to

Amake baking powder

Bmake fruit juice

Cremove rust

Ddry substance

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Question 391

jamb 2015

A liquid that will dissolve fat is

Ahydrochloric acid

Bcalcium hydrochloride

Ckerosene

Dwater

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Question 392

jamb 2015

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

Aincrease the solubility of soap

Bdecrease the solubility of the soap

Csaponify the soap

Demulsify the soap

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Question 393

jamb 2015

Which of the following metals burns with brick red

APb

BCa

CNa

DMg

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Question 394

jamb 2015

The above orbital diagram shown the electronic configuration of

Achlorine

Bnitrogen

Ccalcium

Dneon

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Question 395

jamb 2015

A suitable reagent for distinguish between ethanoic and ethanol is

Abromine water

BFehling’s solution

Csodium hydrogen trioxocarbonate (iv)

DAmmoniacal silver trioxonitrate(V)

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Question 396

jamb 2015

Flow of current in electrolytes is due to the movement of

Aelectrons

BHoles and electron

CIons

DCharges

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Question 397

jamb 2015

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

Aare positively charged

Bare negatively charged

CHave mass

Dtravel in straight lines

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Question 398

jamb 2015

An elements used in production of matches is

Anitrogen

Baluminum

Ccopper

Dsulphur

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Question 399

jamb 2015

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

Aionic

Bcovalent

Cco-ordinate covalent

Dvander Waals

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Question 400

jamb 2015

Which of the noble gases has the greatest ionization energy

AHe

BXe

CAr

DRr

View Explanation & Discuss

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