मराठी
सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Select the Correct Answer from the Choice in the Bracket. the Positively Charged Particle of an Atom.

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प्रश्न

Select the correct answer from the choice in the bracket.

The positively charged particle of an atom.

पर्याय

  • electron

  • proton

  • neturon

MCQ
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उत्तर

proton

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पाठ 3: Elements, Compounds and Mixtures - Objective Type Questions

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विराफ जे. दलाल Simplified Middle School Chemistry [English] Class 7 ICSE
पाठ 3 Elements, Compounds and Mixtures
Objective Type Questions | Q 2.2

संबंधित प्रश्‍न

 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 

 


Correct the following statement:

CO and Co  both represents cobalt.


Define: Compounds


Give Two Examples for Each of the Following: Inert Gases


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

Vinegar


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

Marble


Give reason: Graphite is used to make a lead of the pencils.


Tick (√) the correct alternative from the choice given for the following statement

The most ductile metal.


State what are radicals. Give the names of the radicals –

(a) NO3
(b) OH
(c) SO4
(d) CO3


Select the correct answer from the choice given below.
The negatively charged particles in an atom


Write the names of elements from the following symbol:

Cd


Write the names of elements from the following symbol:

Xe


Explain the difference between Atoms and molecules.


With reference to elements – define the term ‘molecule’. Give two examples each of a monoatomic, diatomic & polyatomic molecule.


Give an example of two liquids which form homogenous.


Classify the following as metals, non-metals and metalloids.

Sodium, Bismuth, Silver, Nitrogen, Silicon, Carbon, Chlorine, Iron, Copper


What are elements? What are they made of? 


Differentiate between elements and compounds.


Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture

Two or more coloured constituents are soluble in some solvent.


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 which is required for combustion.


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