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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 26:

Suitable reagents for the laboratory preparation nitrogen are

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A Sodium dioxonitrate(III) and ammonium chloride
B Sodium trioxonitrate(V) and ammonium chloride
C Sodium chloride and ammonium trioxonitrate(V)
D Sodium chloride and ammonium di-ozonitrate(III)

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Question 27:

The number of electrons in the valence shell of an element of atomic number 14 is?

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A 1
B 2
C 3
D 4

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Question 28:

What volume of oxygen will remain after reacting 8cm of hydrogen gas with 20cm of oxygen gas

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A 10cm\(^3\)
B 12cm\(^3\)
C 14cm\(^3\)
D 16cm\(^3\)

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Question 29:

If one of the following oxides is heated with hydrogen or carbon using a bunsen burner. it is not reduced to the metal, Which one is it?

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A Lead oxide
B Magnesium oxide
C Copper oxide
D Tin oxide

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Question 30:

The lUPAC name for

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A 1-methyl pentane
B 3-methylbutane
C 2-methylbutane
D 1-dimethyl propane

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