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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.

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

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Question 1 of 3 143 total questions
Question 71
jamb 2001

A particle that contains 9 protons, 10 neutrons and 10 electrons is a

Anegative ion
Bpositive ion
Cneutral atom of non-metal
Dneutral atom of a metal
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Question 72
jamb 2001

What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen?
[H = 1, O = 16]

A36.0g
B8.0g
C72.0g
D16.0g
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Question 73
jamb 2001

25cm\(^3\) of a gas X contains Z molecules at 15\(^0\)C and 75 mmHg. How many molecules will 25cm\(^3\) of another gas Y contain at the same temperature and pressure?

A2 Y
B2 Z
CZ
DY
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