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.
nitrogen
neon
argon
oxygen
Correct answer is D
Alkaline pyrogallol absorbs 92
Which of the following is arranged in order of increasing electronegativity?
Chlorine, aluminium, magnesium, phosphorus, sodium
sodium, magnesium, aluminium, phosphorus, chlorine
Chlorine, phosphorus, phosphorous, aluminium, magnesium, sodium
Sodium, chlorine, phosphorus, magnesium, aluminium
Correct answer is B
No explanation has been provided for this answer.
Which of the following represents the type of bonding present in ammonium chloride molecule?
Ionic only
Covalent only
Ionic and dative covalent
Dative covalent only
Correct answer is C
No explanation has been provided for this answer.
10 and 10
9 and 9
11 and 9
9 and 11
Correct answer is D
X- means one excess electron, hence 9 protons while Y +/- means one deficit electron hence 11 protons X and Y = 9 and 11
5
4
3
2
Correct answer is C
The atomic number of phosphorus is 15 and the 3p sublevel has three unpaired electrons.