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प्रश्न
Choose the most appropriate answer
A pair of metalloids are
विकल्प
Na and Mg
B and Si
C and P
He and A
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उत्तर
B and Si
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संबंधित प्रश्न
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Baking Soda
Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.
Salt from sea water
Fill in the blank
Mixtures can be ...................... or .....................
Write true or false
The constituents of a mixture can only be separated by chemical means
Name the different types of chromatographic techniques.
Give a reason for the following statement :
Components in a mixture can be separated by physical methods only.
Why do we separate mixtures?
Visit a nearby paddy field and rice mill and note down the different separating techniques used there. Is technology replacing some traditional practices?
How would you obtain clear water from a sample of muddy water?
You are provided with a mixture of salt, sand, oil and water. Write the steps involved for the separation of salt, sand and oil from the mixture by giving an activity along with the diagram.
