Chemistry Past Questions For JAMB/WAEC/NECO Students v3

Chemistry Past Questions For JAMB/WAEC/NECO Students v3; These Chemistry questions are for students who are sitting for the following examinations:

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• JAMB
• Post-UTME / Post-JAMB
• WAEC
• NECO
• WAEC GCE
• NECO GCE
• NABTEB
• NABTEB GCE

Results

#1. The most important ore of aluminium is

A. bauxite

A. bauxite

B. magnetite

B. magnetite

C. haematite

C. haematite

D. monazite

D. monazite

#2. The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of

A. an addition reaction

A. an addition reaction

B. a condensation reaction

B. a condensation reaction

C. an oxidation reaction

C. an oxidation reaction

D. an elimination reaction

D. an elimination reaction

#3. The number of electrons presents in H+ is

A. zero

A. zero

B. one

B. one

C. two

C. two

D. three

D. three

#4. The hottest part of the gas flame is known as

A. luminous zone

A. luminous zone

B. dark zone

B. dark zone

C. blue zone

C. blue zone

D. non-luminous zone

D. non-luminous zone

#5. The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is

A. carbon

A. carbon

B. hydrogen

B. hydrogen

C. oxygen

C. oxygen

D. nitrogen

D. nitrogen

#6. The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is

A. chain isomerism

A. chain isomerism

B. functional group isomerism

B. functional group isomerism

C. positional isomerism

C. positional isomerism

D. metamerism

D. metamerism

#7. The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

A. 1/6

A. 1/6

B. 1/3

B. 1/3

C. 1/8

C. 1/8

D. 1/4

D. 1/4

#8. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3

A. 4

A. 4

B. 5

B. 5

C. 2

C. 2

D. zero

D. zero

#9. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in

A. 1.8 gram of H2O

A. 1.8 gram of H2O

B. 12 moles of KMnO4

B. 12 moles of KMnO4

C. 0.6N H2SO4

C. 0.6N H2SO4

D. 4.6 gram of C2H5OH

D. 4.6 gram of C2H5OH

#10. The National Chemical Laboratory is situated in

A. New Delhi

A. New Delhi

B. Bangalore

B. Bangalore

C. Pune

C. Pune

D. Patna

D. Patna

#11. Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be

A. 2 : 16 : 2

A. 2 : 16 : 2

B. 2 : 16 : 1

B. 2 : 16 : 1

C. 1 : 16 : 2

C. 1 : 16 : 2

D. 1 : 1 : 1

D. 1 : 1 : 1

#12. The mass number of an atom is equal to

A. the number of protons

A. the number of protons

B. the number of protons and electrons

B. the number of protons and electrons

C. the number of nucleons

C. the number of nucleons

D. the number of neutrons

D. the number of neutrons

#13. The maximum number of covalent formed by nitrogen is

A. 1

A. 1

B. 2

B. 2

C. 3

C. 3

D. 4

D. 4

#14. The formula C6H5-CO-CH3 represents

A. Acetone

A. Acetone

B. Acetic acid

B. Acetic acid

C. Acetophenone

C. Acetophenone

D. Phenyl acetate

D. Phenyl acetate

#15. The metal that is usually extracted from sea water is

A. Ca

A. Ca

B. Na

B. Na

C. K

C. K

D. Mg

D. Mg

#16. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

A. liquation

A. liquation

B. leaching

B. leaching

C. levigation

C. levigation

D. magnetic separation

D. magnetic separation

#17. The inert gases are ____ in water

A. sparingly soluble

A. sparingly soluble

B. insoluble

B. insoluble

C. soluble

C. soluble

D. None of these

D. None of these

#18. The molecular formula of phosphorous is

A. P1

A. P1

B. P2

B. P2

C. P3

C. P3

D. P4

D. P4

#19. The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of

A. atomic structure

A. atomic structure

B. metallurgy

B. metallurgy

C. periodic table of contents

C. periodic table of contents

D. discovery of elements

D. discovery of elements

Finish

Practice other questions here

Practice other Chemistry questions here