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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Name the Technique that You Use If Only the Solid Component of a Solution is Required.

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प्रश्न

Name the technique that you use if only the solid component of a solution is required.

एक शब्द/वाक्यांश उत्तर
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उत्तर

Evaporation.

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पाठ 3: Elements, Compounds and Mixtures - Additional questions 8

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एस.पी. सिंह Concise Chemistry [English] Class 7 ICSE
पाठ 3 Elements, Compounds and Mixtures
Additional questions 8 | Q 4

संबंधित प्रश्‍न

Define mixture. 


Give Two Examples for Each of the Following: Non-metals


Why is it necessary to separate the constituents of a mixture.


Write the Chemical Name of the Following and Also Give Their Molecular Formulae:

Marble


Give two applications of chromatography.


Give two examples of  Noble gases.


State the number of atoms of each element, present in \[\ce{HNO3}\].

Also name the compound.


State the number of atoms of CaCO3


Give one use of the following substance:
Iron


Give reason: A frying pan is made up of steel but its handle is made up of wood.


Complete the statement with the correct words.
__________ are chemicals formed on reaction of a base with an _____ giving salt and water.


Write the names of elements from the following symbol:

Br


Write an answer to the following question in your own words.

Which elements (metals and non-metals), compounds and mixtures do we use in our day-to-day life?


Give an example of two liquids which form homogenous.


There are ______ number of known elements.


Non-metal conducting electricity :______ :: Metal conducting electricity : Copper


Classify the following as elements and compounds.

Water, Common salt, Sugar, Carbon dioxide, Iodine and Lithium


An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess?


______ is the life-giving element is the air.


Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

Name a non-metal other than carbon that shows allotropy.


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