An unsaturated solution differs from a saturated solution at a given temperature because it
Cannot dissolve more solute
Can hold more solute than it can actually dissolve
Can still dissolve more solute at given temperature
Form crystal more easily on cooling
Correct answer is C
An unsaturated solution contains a lesser amount of solute than that in a saturated solution. It can go on to dissolve more quantities of solute at the same temperature until it becomes a saturated solution.
Aluminium is used in the manufacture or aircraft because it
Is hard and brittle
Is light and resists corrosion
Has high density and conducts electricity
Is malleable and ductile
Correct answer is B
No explanation has been provided for this answer.
Metals can be stretched into wires because they are
Ductile
Good conductors
Lustrous
Malleable
Correct answer is A
No explanation has been provided for this answer.
The mass of potassium hydroxide required to make 300.ocm3 of 0.4 moldm-3 solution is {KOH = 56.0}
26.88g
13.44g
6.72g
3.36g
Correct answer is C
300cm3 of 0.4moldm3
1000cm3 contains 0.4mole
300cm3 will contain \(\frac{300 \times 0.4}{1000}\)
= 0.12mole
Number of moles = \(\frac{Mass}{\text {Molecular mass}}\)
Mass = number of moles x m.mass
= 0.12 x 56 = 6.72g
Chemicals that are produced in small quantities and with very degree of purity are
Bulk chemicals
Fine chemicals
Heavy chemicals
Light chemicals
Correct answer is B
No explanation has been provided for this answer.