21
24
45
66
Correct answer is B
No explanation has been provided for this answer.
What volume of 0.5mldm3 H2SO4 will exactly neutralize 20cm3 of 0.1moldm3 NaOH Solution?...
The following are properties of transition metals except ...
Which of the following metals reacts slowly with cold water? ...
The periodic property that is used to determine whether a covalent molecule is polar or not is ...
What is the principal ore of iron, from which iron is extracted? ...
Which metal is a constituent of both bronze and solder? ...
When element 20Y combines with element 8Z, it forms...
When calcium oxide is heated with carbon, the oxide will ...