मराठी
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. - Chemistry

Advertisements
Advertisements

प्रश्न

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

एक शब्द/वाक्यांश उत्तर

उत्तर

Evaporation.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 3: Elements, Compounds and Mixtures - Additional questions 8

APPEARS IN

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

संबंधित प्रश्‍न

Choose the most appropriate answer 

 A solvent of Iodine is


Tick the most appropriate answer.

The constituents of a mixture are present in

  1. a fixed ratio
  2. a variable ratio,
  3. the ratio of 2: 1
  4. none of these

 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 

 


 Differentiate between the following.

Filter Paper and Alum


Give Two Examples for Each of the Following: Inert Gases


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


Name: the Hardest Naturally Occurring Substance


How is sodium chloride different from its constituent elements, sodium and chlorine in its properties? Justify.


Indicate whether the following statement is true or false:
Noble gases are high reactive


Indicate whether the following statement is true or false:
Ozone is a triatomic molecule


Tick (√) the correct alternative from the choice given for the following statement.
Sugar is a compound which consists of the elements


The important physical properties of substances are colour, odour, nature, density & solubility in water.

Name – a gas with a pungent, choking odour which is lighter than air


The important physical properties of substances are colour, odour, nature, density & solubility in water.

Name - a poisonous gas almost as heavy as air.


Give three differences between elements & compounds with relevant examples.


There are ______ number of known elements.


What are elements? What are they made of? 


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.


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?


Match the following:

1. Co2 a. Robert Boyle
2. Sulfur b. Making mobile phones
3. Element c. triatomic molecule
4. Gallium d. Polyatomic molecule

Elements contain the ______of the same kind.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×