Advertisements
Advertisements
Question
Which method is better for recovering sugar from sugar solution : evaporation or crystallisation ? Give reason
for your answer.
Advertisements
Solution
Crystallization is a better than evaporation for recovering sugar from sugar solution. During evaporation, sugar can get charred on heating. However, in crystallization, no such problem occurs and we can get pure crystals of sugar.
APPEARS IN
RELATED QUESTIONS
Intermolecular space is maximum in .......... less in ............ and the least in .........
The molecules can move freely anywhere in
Define matter.
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
- swelling up of a raisin on keeping in water
- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
- aquatic animals using oxygen dissolved in water during respiration
Classify the following into elements and compounds :
- H2O
- He
- Cl2
- CO
- Co
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
Explain what happens when a beam of light is passed through a colloidal solution.
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
How is the impurity of iron present in several substances removed in industries ?
The boiling point of liquid argon is :
The best way to recover sugar from an aqueous sugar solution is :
There are three liquids A, B and C, all having different densities and different boiling points. Liquids A and C are organic in nature whereas liquid B is considered to be inorganic. When liquids A and B are put together in a container, they form a single layer. On the other hand, when, liquids B and C are mixed, they form two separate layers :
(a) Which process will you use to separate a mixture of A and B ?
(b) Which method will you use to separate a mixture of B and C ?
(c) Name the liquids which would behave like (i) A (ii) B and (iii) C.
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
The most reactive metal is ______.
Evaporation does form bubbles.
Compressibility of solids: ______.
Define the term matter.
