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What Do You Understand by the Statement " the Solubility of Copper Sulphate in Water at 20°C is 20.7 G" ? - Science

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प्रश्न

What do you understand by the statement " the solubility of copper sulphate in water at 20°C is 20.7 g" ?

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उत्तर

This statement means that 20.7 gm of copper sulphate can be dissolved in 100 gm of water at 20°C.

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अध्याय 2: Is Matter Around Us Pure - Very Short Answers [पृष्ठ ८१]

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लखमीर सिंग Chemistry [English] Class 9
अध्याय 2 Is Matter Around Us Pure
Very Short Answers | Q 48.2 | पृष्ठ ८१

वीडियो ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्न

Intermolecular force of attraction is maximum in ............ less in .......... and the least in .............


Name the terms for the particles of matter which may or may not have independent existence.


Fill in the blank

Liquids have a definite ______


Out of solids, liquids and gases, which one has :

  1. maximum movement of particles ?
  2. maximum interparticle attractions ?
  3. minimum spaces between particles ?

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  :

  1. swelling up of a raisin on keeping in water
  2. spreading of virus on sneezing
  3. earthworm dying on coming in contact with common salt
  4. shrinking of grapes kept in thick sugar syrup
  5. preserving of pickles in salt
  6. spreading of smell of cake being baked in the kitchen
  7. aquatic animals using oxygen dissolved in water during respiration

Classify the following into elements and compounds :

  1. H2O
  2. He
  3. Cl2
  4. CO
  5. Co

Name two solid, two liquid and two gaseous elements at the room temperature.


Define a compound. Give two points of evidence to show that sodium chloride is a compound.


Which of the following are not compounds ?

Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond


If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.


Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?


Tincture of iodine has antiseptic properties. This solution is made by dissolving :


Name the process by which common salt is purified.


How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?


The technique which is used to separate particles of a solid suspended in a liquid quickly is called :


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.

  1. What could X be ?
  2. What could Y be ?
  3. Name the process Z.
  4. Which process would you use to recover both the components X and Y from tincture of iodine ?
  5. Which process can be used to recover only component Y from tincture of iodine ?

Complete the given analogy.

Murukku from hot oil: ______:: Coffee powder residue from decoction: ______


Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.


The fluidity of solids: ______.


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