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प्रश्न
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
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उत्तर
A heterogeneous mixture of liquid and solid is conveniently separated by centrifugation.
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संबंधित प्रश्न
Intermolecular force of attraction is maximum in ............ less in .......... and the least in .............
What are the two conditions for the interconversion of states of matter ?
Name the scientist who studied the movement of pollen grains suspended in water through a microscope. What is this phenomenon known as?
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
- swelling up of a raisin on keeping in water
- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
- aquatic animals using oxygen dissolved in water during respiration
Which type of elements, metals or non-metals, show the property of brittleness ?
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 ?
State two physical properties on the basis of which metals can be distinguished from non-metals.
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
What is meant by a solution?
Which of the following is not an emulsion ?
Which one of the following is not a chemical change ?
What is the difference between colloids and suspensions ?
One of the following represents the solution of solid in a solid. This one is :
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
Naphthalene can be separated from sand :
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
Give some examples of the Tyndall effect observed in your surroundings?
Intermolecular space is maximum in ______.
Define the term matter.
