Question 14 Marks
(a) Define sublimation. State the kind of mixture in which this method is used.
(b) How can you separate the components of the mixture of kerosene oil and water? Mention the principle involved in it.
(b) How can you separate the components of the mixture of kerosene oil and water? Mention the principle involved in it.
Answer
View full question & answer→(a) Sublimation isolates a mixture of solids such as sublime. Many liquids change instantly, from solid to
vapor phase on heating, without going through the liquid state. This process is sublimation.
Sublimation is the process of state change of substance directly from solid-state to gaseous state.
• Mixture of sublabel and non-sublabel substances can be separated using the technique called sublimation.
• The mixture of sublabel and non-sublabel substance is heated in a china dish by covering with an inverted funnel (the stem of the funnel is closed with cotton to prevent the escape of vapor's)
(b) Yes, a mixture of kerosene and water can be separated using a separating funnel.
Process involved :-
• Kerosene and water are immiscible with each other and they form separate layers when kept undisturbed for a while.
• The separation of layers occurs because of the difference in densities of both liquids. The lower layer is of water since it has more density than kerosene while kerosene stays at the top.
vapor phase on heating, without going through the liquid state. This process is sublimation.
Sublimation is the process of state change of substance directly from solid-state to gaseous state.
• Mixture of sublabel and non-sublabel substances can be separated using the technique called sublimation.
• The mixture of sublabel and non-sublabel substance is heated in a china dish by covering with an inverted funnel (the stem of the funnel is closed with cotton to prevent the escape of vapor's)
(b) Yes, a mixture of kerosene and water can be separated using a separating funnel.
Process involved :-
• Kerosene and water are immiscible with each other and they form separate layers when kept undisturbed for a while.
• The separation of layers occurs because of the difference in densities of both liquids. The lower layer is of water since it has more density than kerosene while kerosene stays at the top.