Advertisements
Advertisements
प्रश्न
Honey is more viscous than water. Can you suggest why?
Advertisements
उत्तर
Honey is more viscous than water because inter-molecular force of attraction between honey particles is more than that of water molecules.
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 |
Gases have definite volume but no definite shape.
Name the processes involved in two cases.
What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain during Brownian motion.
Name the property which enables metals to be drawn into wires.
What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?
Fill in the following blanks with suitable words :
The elements which are sonorous are called ..........................
What elements do the following compounds contain ?
Sugar, Common salt
State two physical properties on the basis of which metals can be distinguished from non-metals.
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
State whether the following statement is true or false :
Bread is an example of solid foam.
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
How will you separate a mixture of iron filings, chalk powder and common salt ?
Which of the following cannot be separated from air by the process of fractional distillation ?
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
Wipe the board with a duster and then tap the duster against the table. What do you see?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
Compressibility of solids: ______.
