Advertisements
Advertisements
प्रश्न
How will you separate water from mustard oil ?
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.
APPEARS IN
संबंधित प्रश्न
Intermolecular force of attraction is maximum in ............ less in .......... and the least in .............
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
Fill in the blank :
The state of matter with definite volume and definite shape is called______
Fill in the blank :
The substances which can flow are called ________
Fill in the blank
All matter is made up of tiny particles called ______
Explain why steel is used to make railway lines.
State two physical properties on the basis of which metals can be distinguished from non-metals.
State whether colloidal solutions are homogeneous or heterogeneous.
What is the difference between solutions and colloids ?
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
Define Sol and give one example.
State whether the following statement are true or false :
Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).
The boiling point of liquid argon is :
There are three liquids A, B and C, all having different densities and different boiling points. Liquids A and C are organic in nature whereas liquid B is considered to be inorganic. When liquids A and B are put together in a container, they form a single layer. On the other hand, when, liquids B and C are mixed, they form two separate layers :
(a) Which process will you use to separate a mixture of A and B ?
(b) Which method will you use to separate a mixture of B and C ?
(c) Name the liquids which would behave like (i) A (ii) B and (iii) C.
Write a few lines on the blackboard with a chalk. Now observe the chalk. What changes do you see in the chalk?
The property which allows the metals to be hammered into their sheets is ______.
A standard sheet of paper is about ______ of atoms thick
Define the term matter.
