Advertisements
Advertisements
प्रश्न
Give a reason for the following statement:
Components in a mixture are present in varying proportions and not in a fixed proportion.
Advertisements
उत्तर
A mixture is an impure substance containing more than one element or compound, mechanically mixed together in any proportion and the mixture retains the properties of its constituents i.e. elements or compounds.
APPEARS IN
संबंधित प्रश्न
Give one example for the following type of mixtures
solid-solid homogenous mixture.
Match the columns.
| column A | column B |
|
1. to separate grain from chaff |
a. filtration |
| 2. to saparate sawdust from water | b. sedimentation and deeantation |
| 3. to separate iodine from sodium chloride | c. winnowing |
| 4. to separate iron fillings from sand | d.sublimation |
|
5. it is used to separate sand and water |
e maganetic separation |
|
|
f .handpicking |
What are the different types of mixtures ?
Why is it necessary to separate the constituents of a mixture.
Give two applications of chromatography.
Mention three gaseous elements and write their molecular formulae
Find the atomicity of the Following molecule:
Carbon Monoxide
Fill in the blank
The most abundant element in the earth’s crust is _______.
Indicate whether the following statement is true or false:
Metals can be polished.
Indicate whether the following statement is true or false:
Molecules combine to form atoms
Indicate whether the following statement is true or false:
Noble gases are high reactive
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name - a poisonous gas almost as heavy as air.
Give the name of the radical - OH
Select the correct answer from the choice given below.
An element which is a poor conductor of heat
Write the names of elements from the following symbol:
Si
Select the correct answer from A, B, C, D & E for the statement given below :
A noble gas.
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
Classify the following as elements and compounds.
Water, Common salt, Sugar, Carbon dioxide, Iodine and Lithium
Name the process associated with the following
A fine beam of light entering through a small hole in a dark room illuminates the particles in its paths.
What is the Latin name of Sodium?
