A substance is said to be hygroscopic if it absorbs

D. moisture from the atmosphere without dissolving

A. water from the atmosphere to form a solution

C. carbon (IV) oxide from the atmosphere

D. moisture from the atmosphere without dissolving

A hydrogen atom which has lost an electron contains

D. one proton, one electronic and one neutron

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WAEC (WASSCE) • Chemistry

WAEC (WASSCE) Chemistry Past Questions & CBT Practice

Chemistry covers physical, inorganic and organic chemistry. Past questions are high-yield revision: the same reaction types, calculations and common compounds come up again and again. On this page you can try sample WAEC (WASSCE) Chemistry past questions with the answers marked, open the paper for each exam year we have, and start timed CBT-style practice.

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Sample WAEC (WASSCE) Chemistry questions

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Q1MEDIUMChemistry
A substance is said to be hygroscopic if it absorbs
1. A.water from the atmosphere to form a solution
2. B.heat from the surrounding
3. C.carbon (IV) oxide from the atmosphere
4. D.moisture from the atmosphere without dissolving✓ Correct
Q2MEDIUMChemistry
A mixture of kerosene and diesel oil can be separated by
1. A.crystallization
2. B.distillation✓ Correct
3. C.precipitation
4. D.sublimation
Q3MEDIUMChemistry
The gas given off when NH4 Cl is heated with an alkali is
1. A.H2
2. B.Cl2
3. C.N2
4. D.NH3✓ Correct
Q4MEDIUMChemistry
A hydrogen atom which has lost an electron contains
1. A.one proton only✓ Correct
2. B.one neutron only
3. C.one proton and one neutron
4. D.one proton, one electronic and one neutron
Q5MEDIUMChemistry
Chemicals that are produced in small quantities and with very high degree of purity are
1. A.bulk chemicals
2. B.fine chemicals✓ Correct
3. C.heavy chemicals
4. D.light chemicals
Q6MEDIUMChemistry
Which of the following molecules is not linear in shape?
1. A.CO2
2. B.O 2
3. C.NH3✓ Correct
4. D.HCI

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WAEC (WASSCE) Chemistry past questions by year

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WAEC Chemistry syllabus

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