Advertisements
Advertisements
प्रश्न
Which method is better for recovering sugar from sugar solution : evaporation or crystallisation ? Give reason
for your answer.
Advertisements
उत्तर
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
संबंधित प्रश्न
Liquids have definite volume but do not have definite shape.
Name the terms for the change of a solid into liquid.
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?
Name one solid, one liquid and one gaseous non-metal.
Name the property which allows metals to be hammered into thin sheets.
Fill in the following blanks with suitable words :
The elements which are sonorous are called ..........................
What is the other name for impure substances ? Give two examples of impure substances.
“Is malleable and ductile” best describes :
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
One of the following does not show Tyndall effect. This one is :
Name the process which is used in milk dairies to separate cream from milk.
How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).
Explain how, nitrogen , oxygen and argon gases are separated from air.
Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.
What's the solution?
We need to rub salt on a corncob, but only salt crystals are available.
Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
The most reactive metal is ______.
Complete the following table:
| S.No. | CELSIUS | KELVIN |
| 1. | 90°C | 363 K |
| 2. | ______ | 283 K |
| 3. | 63 °C | ______ |
| 4. | 250°C | ______ |
| 5. | ______ | 303 K |
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
Define the term matter.
