Advertisements
Advertisements
प्रश्न
How will you separate a mixture containing sand and sugar ?
Advertisements
उत्तर
We will use filtration to separate a mixture of sand and sugar. Sugar dissolves in water but sand does not. These properties of sugar and sand allow them get separated by filtration.
In filtration, suspension can be filtered using a filter paper leaving sand as residue on the filter paper. Now, the filtrate contains sugar only. Sugar can further be recovered from the filtrate.
APPEARS IN
संबंधित प्रश्न
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
Define the term matter. What is it composed of?
What are molecules ?
What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain during Brownian motion.
What is meant by saying that metals are lustrous ?
What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
What are the two types of pure substances? Give one example of each type.
“Is malleable and ductile” best describes :
What is the name of the clear liquid formed when a solid dissolves in a liquid ?
Define Sol and give one example.
What is meant by the concentration of a solution ?
Which of the following do not exhibit Tyndall effect ?
Starch solution, Sugar solution, Ink, Salt solution, Copper sulphate solution, Ammonium chloride solution, Fog, Smoke, Car exhausts.
Define solubility of a substance. How does it vary with temperature ?
The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
Write a few lines on the blackboard with a chalk. Now observe the chalk. What changes do you see in the chalk?
Which among the following ______ will get attracted to by magnet?
In Aerosol the dispersed phase is liquid and the dispersion medium is gas.
Solids do not flow.
Define the term matter.
