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.
X
W
Z
Y
Correct answer is C
No explanation has been provided for this answer.
Millikan's contributions to the development of atomic theory is the determination of
charge on electron
positive rays
charge to mass ratio
cathode rays
Correct answer is A
No explanation has been provided for this answer.
An oxide XO2 has a vapour density of 32. What is the atomic mass of X?
32
20
14
12
Correct answer is A
Relative molecular mass of XO2 =2 × vapour density
Relative molecular mass → 32 * 2 = 64
Atomic mass of X:
X + [16 * 2] = 64
X = 64 - 32
=32
Cancerous growths are cured by exposure to
γ - rays
β - rays
α - rays
infrared rays
Correct answer is A
No explanation has been provided for this answer.
A particle that contains 9 protons, 10 neutrons and 10 electrons is a
negative ion
positive ion
neutral atom of non-metal
neutral atom of a metal
Correct answer is A
No explanation has been provided for this answer.