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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 11:

In the reaction NH3 + H+ â†’ NH4+, the bond formed results from?

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A An electron transferred from NH₃ + H⁺
B An electron pair donated by NH₃
C An electron pair equally shared
D An electron pair donated by H⁺
E An electron tarnsferred from H⁺ to NH₃

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Question 12:

Which of the following CANNOT be obtained by fractional distillation of petroleum?

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A Ether
B Methane
C Butane
D Ethene
E Hydrogen

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Question 13:

In the reaction N₂(g) + O(g)
â†” 2NO(g) produced i an increase in the total pressure will?

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A Cause less nitrogen to be produced in the equilibrium mixture
B Cause less nitric oxide to be produced in the equilibrium mixture
C Cause more nitric oxide to be produced in the equilibrium mixture
D Cause more oxygen to be produced in the equilibrium mixture
E Have no effect

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Question 14:

In the chemical reaction A + B \(\to\) C + D, more of D is formed?

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A If the concentrated of A is reduced
B If the concentrated of B is reduced
C If the concentrated of C is reduced
D If the concentration of C is increased
E If D is continuously removed from the reaction mixture

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Question 15:

1.00 g of the oxide of metal X (atomic mass = 64) gave 0.80 g of the metal when reduced with hydrogen.
The formula of the oxide is?

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A X₂O
B XO
C XO₂
D X₂O₃
E X₃O₄

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