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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
उत्तर
B and Si
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संबंधित प्रश्न
Fill in the blank
A ________ substance has only one kind of matter.
How is distillation method different from evaporation?
Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.
Calcium carbonate and sodium chloride
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State any one method – to separate the following mixtures – A mixture of different solid constituents – in a liquid constituent.
Explain with diagram the process used to – separate the following substance from the given mixtures - Lead nitrate [soluble] from a mixture of – lead nitrate & water Le. lead nitrate solution.
Select the correct answer from the choice given below to complete the sentence :
A soluble solid is separated from an insoluble solid by ____________.
Give a reason for the following statement :
Components in a mixture can be separated by physical methods only.
Give a reason for the following statement :
Zinc is considered an element, while zinc sulphide is considered a compound.
What is meant by separation?
