Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
The alkyl group can be represented by the general formula
CnH2n+1
CnH2n
CnH2n+2
CnH2n-2
Correct answer is A
No explanation has been provided for this answer.
Oxyacetylene flame is used for iron-welding because it
Makes the iron metals solidify very quickly
Combines with oxygen to give a pop sound
Evolves a lot of heat when burnt
Dissociates to produce carbon (IV) oxide and oxygen
Correct answer is C
No explanation has been provided for this answer.
Sodium metal is always kept under oil because it
Readily reacts with water
Is reduced by atmospheric nitrogen
Reacts vigorously on exposure to air
Reacts with oxygen and carbon (IV) oxide
Correct answer is C
No explanation has been provided for this answer.
Transition metals possess variable oxidation states because they have
Electrons in the d orbitals
Electron in the s orbitals
A variable number of electrons in the p orbitals
Partially filled p orbitals
Correct answer is A
No explanation has been provided for this answer.
Electroplating
Arc-welding
Reducing and mixture of their metallic oxide
Cooling a molten mixture of the metals
Correct answer is D
No explanation has been provided for this answer.