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प्रश्न
Fill in the blanks
___________is a process to obtain a very pure form of a solid dissolved in a liquid.
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उत्तर
Crystallisation is a process to obtain a very pure form of a solid dissolved in a liquid.
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संबंधित प्रश्न
Classify each of the following as a homogeneous or heterogeneous mixture.
Soda water, wood, air, soil, vinegar, filtered tea.
How will you separate a mixture of sodium chloride and sand ?
Which of the following can be separated by using a separating funnel and which cannot be separated by using a separating funnel ?
- water and kerosene mixture
- water and acetone mixture
Give reasons for your answer.
Seawater tastes salty due to the dissolved salt. the salinity (the proportion of salts in water) of some water bodies Lonar lake - 7.9 %, Pacific Ocean 3.5%, Mediterranean sea - 3.8%, Dead sea - 33.7%. Explain two characteristics of the mixture from the above information.
Name the components present in the following mixture:
Crude petroleum oil
Give an example for mixture and justify your answer with reason.
Which of the following are physical changes?
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal
Suggest separation technique(s) one would need to employ to separate the following mixture.
Kerosene oil, water and salt
The ‘sea-water’ can be classified as a homogeneous as well as a heterogeneous mixture. Comment.
Sucrose (sugar) crystals obtained from sugarcane and beetroot are mixed together. Will it be a pure substance or a mixture? Give reasons for the same.
