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.
0.05
0.10
2.60
2.80
Correct answer is A
(mass / molar mass) X (1000 / vol )
(0.28 / 56.0) X (1000 / 100 )
= 2.8 / 56
= 0.05 mol\dm\(^3\)
The properties of a good primary standard solution include the following except?
High molecular mass
low molecular mass
high degree of purity
readily available
Correct answer is B
Properties of a good standard solution
The name of the compound CH\(_3\)C(CH\(_3\))\(_2\)CH\(_2\)CH\(_2\)CH\(_3\)
2 - methyl butane
2,2 - dimethyl butane
2 - methyl pentane
2,2 - dimethyl pentane
Correct answer is D
- The longest chain has five carbon atoms i.e PENT
- with two methyl attached to the second carbon atom
Which of the following compounds has coordinate bonds in its structure?
Al\(_2\)Cl\(_6\)
MgCl\(_2\)
AgCl
NaCl
Correct answer is A
Aluminum chloride (Al2Cl6) has coordinate dative bonding
What is the percentage by mass of H in CH3COOH
1.7%
5.0%
6.7%
7.1%
Correct answer is C
- molecular mass (or molar mass) is 60.05 g/mol
- with 4 atoms of hydrogen present
( 4 / 60 ) X 100
≈6.7%