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प्रश्न
Write true or false
All pure substances have characteristic melting and boiling points.
पर्याय
True
False
उत्तर
True
APPEARS IN
संबंधित प्रश्न
Name the main metal present in the following :
Haemoglobin
Name the main metal present in the following:
Chalk
Why is it named so?
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
By using a separating funnel
Fill in the blank
A pure substance has definite _______ and constant _________.
Fill in the blank
Use of a __________ to separate the components of a mixture of solids is based on the difference in the size of the components.
Match the columns.
| Column A | Column B |
| 1. To separate grain from chaff | a. filtration |
| 2. To seperat sawdust from water | b. sedimentation and decantation |
| 3. To separate iodine from sodium chloried | c. winnowing |
| 4. To separate iron fillings from sand | d. sublimation |
| 5.It is used to separate sand and water | e.magnetic separation |
| f. handpiicking |
Name the substance you will add to speed up sedimentation.
Differentiate between the terms elements, compounds, and mixtures with suitable examples.
When two or more elements combine together they form ______.
