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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.

48 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10
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Past Questions

48 questions
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Question 1 of 8 48 total questions
Question 21
jamb 2003

According to the kinetic theory, an increase in temperature causes the kinetic energy of particles to

ADecrease
BIncrease
CRemain constant
DBe zero
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Question 22
jamb 2003

The noble gases owe their inactivity to

AOctet configuration
BCyclic shape
CHexagonal shape
DObtuse configuration
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Question 23
jamb 2003

Neutral atoms of neon with atomic number 10 have the same number of electron as

AO2+
BCa2+
CK+
DMg2+
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Question 24
jamb 2003

3Cu + pHNO3 →3Cu(NO)2 + 4H2 O + xNO
In the equation above, the values of p and x respectively are

A1 and 3
B2 and 3
C6 and 2
D8 and 2
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Question 25
jamb 2003

The filter in the cigarette reduces the nicotine content by

ABurning
BAdsorption
CEvaporation
DAbsorption
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Question 26
jamb 2003
What is the percentage by mass of oxygen in Al2(SO4)3. 2H2O?
[Al = 27, S = 32, H = 1, O = 16]
A14.29%
B25.39%
C50.79%
D59.25%
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Question 27
jamb 2003

Which of the following is physical change?

ABurning kerosene
BFreezing ice cream
CExposing white phosphorus
DDissolving calcium in water
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Question 28
jamb 2003
What volume of oxygen is produced from the decomposition of 2 mole of KCIO3 at s.t.p?
[Molar volume of a gas at s.t.p = 22.4 dm3]
A22.4 dm3
B33.6 dm3
C44.8 dm3
D67.2 dm3
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