Which of the following substances with the corresponding pH value is an alkali?
Substance pH
Lime 2.4
Banana 4.6
Distilled water 7.0
Milk of magnesia 10.5
Correct answer is D
No explanation has been provided for this answer.
Zinc oxide is said to be amphoteric because it
forms an acid salt
is an insoluble base
forms a double salt
reacts with a base or an acid
Correct answer is D
No explanation has been provided for this answer.
The type of energy changes that accompany the mixing of a strong acid to a strong base is
electrical
heat
light
sound
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements about volatile liquids is correct? They have
high vapour pressure and low boiling point
high vapour pressure and high boling point
low vapour pressure and low boining point
low vapour pressure and high boiling point
Correct answer is A
No explanation has been provided for this answer.
The vapour pressure of a given volume of liquid increase when the
liquid becomes saturated with a salt
Volume of the liquid increases
temperature of the liquid falls
temperature of the Liquid rises
Correct answer is D
No explanation has been provided for this answer.