Log In SignUp
Classroom

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.

49 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10
Download PHP app Ask a Question Check Syllabus Past Question Videos Topic Video Lessons

Take a test

Custom CBT

Create and set up a CBT environment with your preferred subjects.

JAMB CBT Simulator

Practice JAMB CBT with real UTME past questions in CBT format.

WAEC CBT Practice 2026 Simulator

CB-WASSCE styled past question practice.

NECO CBT Practice 2026 Simulator

SSCE & GCE styled past question practice.

Past Questions

49 questions
All JAMB WAEC NECO CUSTOM
All years 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978
Question 1 of 9 49 total questions
Question 21
jamb 2017

In the laboratory preparation of ethyl ethanoate, the water present in the mixture is removed using ?

AAnhydrous CaCl2
Bconcentrated NaCO4
Cdilute NaOH
Dconcentrated H2SO4
View Explanation & Discuss
Question 22
jamb 2017
The process that occurs when two equivalent forms of a compound are in equilibrium is
AIsotopy
BResonance
CIsomerism
DReforming
View Explanation & Discuss
Question 23
jamb 2017
The acid anhydride that will produce weak acid in water is
ASO3
BNO2
CSO2
DCO2
View Explanation & Discuss
Question 24
jamb 2017
Temporary hard water is formed when rain water containing dissolved carbon(IV) oxide flows over deposits of
ACaCO3
BNa2CO3
CNa2SO4
DCaSO4
View Explanation & Discuss
Question 25
jamb 2017
The tincture of iodine means iodine dissolved in
Aethanol
Bbromine chloride
Cchlorine water
Dwater
View Explanation & Discuss
Question 26
jamb 2017
Aluminium hydroxide is used in the dyeing industry as a
Adye
Bdispersant
Csalt
Dmordant
View Explanation & Discuss
Question 27
jamb 2017
The shape of the S-orbital is
Aelliptical
Bspiral
Ccircular
Dspherical
View Explanation & Discuss
Question 28
jamb 2017
The constituent common to duralumin and alnico is
ACo
BMn
CAl
DMg
View Explanation & Discuss
Question 29
jamb 2017

The general formula of alkanones is

ARCHO
BRCOR'
CRCOOH
DRCOOR
View Explanation & Discuss
Question Navigator
Current
MathsFaculty