Chemistry Past Questions

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

4,306 questions
Question 1 of 20 4,306 total questions
Question 511
jamb 2018

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

AElements in the same period have the same number of valence electrons
BThe valence electrons of the elements in the same period increase progressively across the period
CElements in the same group have the same number of electron shells
DThe non-metallic Properties of the elements tend to decrease across each period
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Question 512
jamb 2018

On which of the following is the solubility of a gaseous substance dependent? 
I. Nature of solvent 
II. Nature of solute 
III. Temperature 
IV. Pressure

AI, II, III and IV
BI and II only
CII only
DIII and IV only
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Question 513
jamb 2018

A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that

Acollisions are perfectly elastic
Bforces of repulsion exist
Cforces of repulsion and attraction are in equilibrium
Dcollisions are inelastic
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Question 514
jamb 2018

A correct electrochemical series can be obtained from Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au by interchanging

AAl and Mg
BZn and Fe
CZn and Pb
DPb and H
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Question 515
jamb 2018

The Consecutive members of an alkane homologous series differ by

ACH
BCH\(_2\)
CCH\(_3\)
DC\(_n\)H\(_n\)
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Question 516
jamb 2018

Which of the following gases may not be dried with concentrated sulphuric acid?

AHCl\(_{(g)}\)
BNH\(_3\)
CCl\(_2\)
DSO\(_2\)
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Question 517
jamb 2018

An element used in the production of matches is

Anitrogen
Baluminium
Ccopper
Dsulphur
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Question 518
jamb 2018

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

Adecrease
Bincrease
Cbe zero
Dremain constant
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Question 519
jamb 2018

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

A298K
B546K
C819K
D1092K
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Question 520
jamb 2018

Which of the following is an example of a chemical change?

Adissolution of salt in water
Brusting of iron
Cmelting of ice
Dseparating a mixture by distillation
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Question 521
jamb 2018

The type of bonding in [Cu(NH\(_3\))\(^4\)]\(^{2+}\) is 

Acoordinate
Belectrovalent
Cmetallic
Dcovalent
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Question 522
jamb 2018

What is the PH of 0.00 1 moldm\(^3\) solution of the sodium hydroxide

A14
B13
C12
D11
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Question 523
jamb 2018

The Sulphide which is insoluble in dilute hydrochloric acid is

AFeS
BCuS
CZnS
DNa2S
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Question 524
jamb 2018

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

Aethene
Bpropane
Cmethane
Dbutane
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Question 525
jamb 2018

According to Charles' law, the volume of a gas becomes zero at

A0°C
B-100°C
C-273°C
D-373°C
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Question 526
jamb 2018

A given amount of gas occupies 10.0dm\(^3\) at 4 atm and 273°C. The number of moles of the gas present is?

[Molar volume of gas at s.t.p = 22.4 dm\(^3\)]

A0.89 mol
B1.90 mol
C3.80 mol
D5.70 mol
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Question 527
waec 2017

Petroleum is a non-renewable source of energy because it

Ais formed naturally
Bis cheap
Ccan be recycled after use
Dcannot be regenerated once used up
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Question 528
waec 2017

A primary alkanol has a molecular mass of 60. What is the structural formula of the compound? [C= 12.0, H= 1.0, O= 16.0)

 



 

AA
BB
CC
DD
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Question 529
waec 2017

The real harmful effect of the release of chlorofluorocarbons into the atmosphere is that it eventually causes

Aexcessive ultraviolet light from the sun to reach the earth surface
Bexcessive release of infrared light from the sun to the earth surface
Ccorrosive effect of the chemicals on humans and animals
Dacidic effect of chemicals on humans
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Question 530
waec 2017

The IUPAC name for the compound \(ClCH_{2}CH_{2}OH\) is

A1- chloropropanol
B2-chloropropanol
C1-chloroethanol
D2-chloroethanol
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