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.

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

150 questions
Question 1 of 10 150 total questions
Question 71
jamb 2009

The type of bonding in \({Cu(NH_3)_4}^2\)+ is?

Acoordinate covalent
Belectrovalent
Cmetallic
Dcovalent
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Question 72
jamb 2009

Which quantum number divides shells into orbitals?

Aprincipal
BArzimuthal
CMagnetic
DSpin
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Question 73
jamb 2009

Cathode rays causes an object placed behind a perforated anode to cast a shadow on the screen. This observation shows that the rays?

Aare positively charged
Bare negatively charged
Chave mass
Dtravel in straight lines
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Question 74
jamb 2009

If an atom is represented as \( _{11}^{23}X \), which of the following deduction is correct?

Ait contains 12 protons
Bit forms a covalent chloride
Cits atomic number is 23
Dit is an alkali metal
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Question 75
jamb 2009

The basic assumption in the kinetic theory of gases that the collisions of the gaseous molecules are perfectly elastic implies that the?

Aforces of attraction and repulsion are in equilibrium
Bgaseous molecules can occupy any available space
Cgaseous molecules will continue their motion indefinitely
Dgases can be compressed
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Question 76
jamb 2009

A gas exerts pressure on its container because?

Athe molecules of a gas collide with the walls of the container
Bsome of the molecules are moving faster than others
Cof the collisions of the molecules with each other
Dof the mass of the molecules of the gas
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Question 77
jamb 2009

0.0075 mole of calcium trioxocarbonate (IV) is added to 0.015 mole of a solution of hydrochloric acid. The volume of gas evolved at s.t.p is?
[Molar volume of a gas at s.t.p = 22.4 dm3]

A224cm3
B168cm3
C112cm3
D100cm3
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Question 78
jamb 2009

The percentage of water of crystallization in ZnSO\(_4\).7H\(_2\)O is?
[Zn = 65, S = 32, O = 16, H = 1]

A33%
B44%
C55%
D87%
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Question 79
jamb 2009

Which of the following is a physical change?

AFreezing ice cream
Bdissolving calcium in water
Cburning kerosene
DExposing white phosphorus to air
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Question 80
jamb 2009

A mixture of sugar and sulphur can be separated by?

Adissolution in water, evapouration and filtration
Bfiltration, evaporation and dissolution in water
Cdissolution in water, filtration and evaporation
Devaporation, dissolution in water and filtration
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