Question
How will you separate camphor, common salt and iron nails from their mixture?
✓
Answer
A horse-shoe magnet is moved on the surface of the mixture of camphor, common salt and iron nails. The iron nails are attracted by the magnet, they cling to the poles of the magnet and get separated. This process is repeated a number of times till complete separation of iron nails occur leaving behind mixture of camphor and common salt. Mixture of camphor and common salt is heated. Camphor sublimes on heating leaving behind common salt and can be recovered in the form of sublimate by cooling its vapours.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Give reasons for:
Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
A body of $2\ kg$ falls from rest. What will be its kinetic energy during the fall at the end of $2s?\ ($Assume $g = 10\ m/s^2)$
→Figure shows the two crop fields [Plots A and B] have been treated by manures and chemical fertilizers respectively, keeping other environmental factors same. Observe the graph and answer the following questions.
- Why does plot B show sudden increase and then gradual decrease in yield?
- Why is the highest peak in plot A graph slightly delayed?
- What is the reason for the different pattern of the two graphs?
Look at the diagram on the right side. Jar A contains are d-brown gas whereas Jar B contains a colourless gas. The two gas jars are separated by a glass plate placed between them:
- What will happen when the glass plate between the two jars is pulled away?
- What name is given to the phenomenon which takes place?
- Name the brown gas which could be in jar A.
- Which is the colorless gas most likely to be present in jar B?
- Name one coloured solid and one colourless liquid which can show the same phenomenon.
How is green revolution different from white revolution?
A stone falls from a building and reaches the ground $2.5$ seconds later. How high is the building? $(g = 8\ m/s^2)$
→Discuss the method of separating a mixture containing chalk powder, iron fillings and naphthalene.
Describe the composition and functions of blood
A girl of mass $50\ kg$ jumps out of a rowing boat of mass $300\ kg$ on to the bank, with a horizontal velocity of $3\ m/s.$ With what velocity does the boat begin to move backwards?
→Draw a plant cell and label the parts which:
- Determines the function and development of the cell.
- Packages materials coming from the endoplasmic reticulum.
- Provides resistance to microbes to withstand hypotonic external media without bursting.
- Is site for many biochemical reactions necessary to sustain life
- Is a fluid contained inside the nucleus.