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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Select the Correct Answer from the Choice in the Bracket. the Least Reactive Metal. - Chemistry

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प्रश्न

Select the correct answer from the choice in the bracket.

The least reactive metal.

विकल्प

  • magnesium

  • silver

  • copper

MCQ
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उत्तर

silver

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

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विराफ जे दलाल New Simplified Middle School Chemistry [English] Class 7
अध्याय 3 Elements, Compounds and Mixtures
Objective Type Questions | Q 2.1

संबंधित प्रश्न

What are the different types of mixtures ?


Tick the most appropriate answer.

How many times is a proton heavier than an electron?

  1. 1500
  2. 1800
  3. 1840
  4. none of these

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

Vinegar


Give two applications of chromatography.


Name: a Metal Which is a Poor Conductor of Electricity.


Fill in the blank
The most abundant element in the earth’s crust is _______.


Indicate whether the following statement is true or false:
Metals can be polished.


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


Select the correct answer from the choice given below.
An impure substance


Write the names of elements from the following symbol:

Br


Write the names of elements from the following symbol:

Ir


‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers 1 to 20 only in the periodic table – differentiate them into – metallic elements, metalloids, non-metals & noble gases.


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


Explain the term ‘mixture’.


Give an example of two liquids which form homogenous.


Select the correct answer from A, B, C, D & E for the statement given below :

A metalloid.


Elements are the______ form of pure substances.


Classify the substances given in Fig. 2.2 into elements and compounds


What is the Latin name of Sodium?


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