Advertisements
Advertisements
Question
The best way to recover sugar from an aqueous sugar solution is :
Options
evaporation to dryness
distillation
filtration
crystallisation
Advertisements
Solution
crystallisation
Crystallisation is a better technique to recover sugar from sugar solution because sugar decomposes or gets charred on heating. Also, the soluble impurities get removed by crystallisation.
APPEARS IN
RELATED QUESTIONS
Intermolecular force of attraction is maximum in ............ less in .......... and the least in .............
Name the terms for the change of vapour into a liquid.
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
What is the scientific name of particles which make up mater?
What are the characteristics of matter?
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
Which of the following can be called a suspension ?
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.
(a) What type of change occurs when solid A is dissolved in water ? Why ?
(b) What type of change occurs when solid D is dissolved in water ? Why ?
(c) Name a metal which you think could behave like solid A. Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
How will you separate a mixture of iron filings, chalk powder and common salt ?
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
Name one pair of liquids which can be separated by using a separating funnel.
All the matter made of ______.
The physical state of water at 373 K is ______.
______ is used for industrial refrigeration and transporting frozen food.
Evaporation is always accompanied by ______ in temperature.
Define the term matter.
