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.
When sodium is added to ethanol, the products are?
sodium hydroxide and water
sodium hydroxide and hydrogen
sodium ethoxide and water
sodium ethoxide and hydrogen
Correct answer is D
No explanation has been provided for this answer.
Which of the following compounds is NOT an isomers of 2,2 dimethylbutane?
2-methylbutane
3-methylpentane
2,3-dimethylbutane
2-methylpentane
Correct answer is A
No explanation has been provided for this answer.
Which of the following is the correct order of decreasing activity of the metals Fe, Ca, Al and Na?
Fe> Ca> Al> Na
Na> Ca> Al> Fe
Al> Fe> Na> Ca
Ca> Na> Fe>, Al
Correct answer is B
The order of reactivity of metals is as follows, Potassium > Sodium > Lithium > Calcium > Magnesium > Aluminium > Zinc > Iron > Copper > Silver > Gold.
Which of the following is NOT true of metals?
They are good conductors of electricity
They ionize by electron loss
Their oxides are acidic
They have high melting points
Correct answer is C
No explanation has been provided for this answer.
In an electrolytic set-up to protect iron from corrosion, the iron is?
made cathode
made anode
used with a metal of lower electropositive potential
initially coated with tin
Correct answer is A
In cathodic protection,iron object is made cathode by connecting it with reactive elements like magnesium,zinc.