हिंदी

How Will You Separate Water from Mustard Oil ?

Advertisements
Advertisements

प्रश्न

How will you separate water from mustard oil ?

टिप्पणी लिखिए
Advertisements

उत्तर

We will separate water from mustard oil by using a separating funnel. Due to the difference in the densities of the two liquids, mustard oil, being lighter than water, floats over it and forms the upper layer, whereas water forms the lower layer. On opening the stop-cock, the lower layer of water comes out first and is collected in a beaker. Mustard oil is left behind in the separating funnel.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Is Matter Around Us Pure - Very Short Answers [पृष्ठ १०६]

APPEARS IN

लखमीर सिंग Chemistry [English] Class 9
अध्याय 2 Is Matter Around Us Pure
Very Short Answers | Q 57 | पृष्ठ १०६

वीडियो ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्न

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


The inter-molecular space is maximum in


Name the processes involved in two cases.


Define matter.


What are the two conditions for the interconversion of states of matter ?


Write true or false for each statement. Rewrite the false statement correctly.

Matter cannot exist in different states.


What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?


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


“Is malleable and ductile” best describes :


Which of the following statements are true for pure substances ?

  1. pure substances contain only one kind of particles
  2. pure substances may be compounds or mixtures
  3. pure substances have the same composition throughout
  4. pure substances can be exemplified by all elements other than nickel

There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.

  1. What type of substance could X be ? Name one substance like X.
  2. What type of substance could Y be ? Name one substance like Y.
  3. What type of substance could Z be ? Name one substance like Z.
  4. Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
  5. Name the three groups into which all the substances like Y are divided on the basis of their properties.

100 mL of water at room temperature of 25°C is taken in a beaker and a little of solid S is dissolved in it by stirring to obtain a solution X. More and more of solid S is added to the solution with constant stirring, while keeping the temperature of solution constant at 30°C. After some time it is observed that no more solid dissolves in water and at the same time some solid is also left undissolved at the bottom of the beaker.

  1. The contents of beaker are filtered through a filter paper to obtain solution Y in the form of a filtrate.
  2. What name is given to solutions like X ?
  3. What name is given to solutions like Y ?
  4. What will you observe if the solution Y at 30°C is cooled down to 10°C by keeping the beaker in crushed ice ? Why ?
  5. What term is used to denote the amount of solid dissolved in 100 grams of water in a solution lie Y ?

Pure copper sulphate can be obtained from an impure sample by the process of :


Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?


Complete the following table:

S.No. CELSIUS KELVIN
1. 90°C 363 K
2. ______ 283 K
3. 63 °C ______
4. 250°C ______
5. ______ 303 K

Intermolecular space is maximum in ______.


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


The fluidity of solids: ______.


Define the term matter.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×