The following compounds contain the same type of bonds except
sodium chloride
hydrogen chloride
magnesium chloride
potassium chloride
lithium chloride
Correct answer is B
No explanation has been provided for this answer.
When magnesium ribbon burns in air, the products are
magnesium nitride and magnesium oxide
magnesium nitride and carbon (ll) oxide
magnesium oxide and steam
magnesium nitride and soot
magnesium oxide and carbon (ll) oxide
Correct answer is C
No explanation has been provided for this answer.
Destructive distillation of coal means
heating coal in plentiful supply of air
burning coal in air to produce water and carbon (IV) oxide
heating coal in the absence of air
heating coal in limited supply of air
separating coal into various allotropes of carbon
Correct answer is C
No explanation has been provided for this answer.
Neutralization
dehydration
hydrolysis
decomposition
hydrogenation
Correct answer is C
No explanation has been provided for this answer.
Which of the following is likely to have the highest degree of hardness?
Carbonated water
Distilled water
Acidified water
Rain water
Lime water
Correct answer is E
Hardness in water is mainly due to the presence of dissolved minerals such as calcium and magnesium ions, carbonated water, and rainwater with added carbon dioxide either naturally or artificially do not contain a great amount of these dissolved minerals hence they are less likely to have a high degree of hardness compared to lime water which contains calcium ions from the dissolved calcium hydroxide.