Question
Write a method to separate a mixture of sand and potash alum.
✓
Answer
Potash alum is soluble in water whereas sand is insoluble in water. The difference in their solubility is used to separate them. The mixture of sand and potash alum is dissolved in water, then it is filtered with the help of filter paper. Sand remains as residue on the filter paper while potash alum solution is obtained as filtrate. The filtrate is then evaporated to get crystals of potash alum.
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
Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why.
Derive the formula: v = u + at, where the symbols have usual meanings.
Explain the need of irrigation in India.
How are two bones attached to each other?
Given alongside is the velocity-tine graph for a moving body:
Find:
- Velocity of the body at point C.
- Acceleration acting on the body between A and B.
- Acceleration acting on the body between B and C.
Suppose a planet exists whose mass and radius both are half that of the earth. The acceleration due to gravity on the surface of this planet will be double? Justify.
What do you understand by the term “transformation of energy”? Explain with an example.
“Prevention of disease is more desirable than its treatment”. Justify the statement by discussing three major strategies to be adopted for the prevention of infectious diseases.
Give a short account of structure and function of adipose tissue.
What is the value of acceleration in the following graph:
