Advertisements
Advertisements
प्रश्न
Classify the following into elements and compounds :
- H2O
- He
- Cl2
- CO
- Co
Advertisements
उत्तर
| Compounds | Elements |
| H2O, CO | He, Co, Cl2 |
APPEARS IN
संबंधित प्रश्न
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
State any two properties for believing that aluminium is a metal.
You are given two liquids, one a solution and the other a compound. How will you distinguish the solution from the compound ?
Name a metal which forms amalgams.
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
Name the process you would use to separate a mixture of water and alcohol.
Name the process by which all the dye can be recovered from black ink.
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
How is scrap iron separated from a heap of waste materials in factories?
With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.
Which of the following mixture cannot be separated by using water as the solvent ?
The technique which is used to separate particles of a solid suspended in a liquid quickly is called :
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.
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
Define the term matter.
______ is a smallest particle.
The phenomenon of Evaporation takes place at the ______ of a liquid.
Define the term matter.
Define the term matter.
