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What Are (I) Metals (Ii) Non-metals, and (Iii) Metalloids ? Give Two Examples Each of Metals, Non-metals and Metalloids.

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प्रश्न

What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.

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उत्तर

  1. Metals: Metals are  elements that are malleable, ductile and conduct electricity.
    Examples: Aluminum and zinc
  2. Non-metals: Non-metals are elements that are neither malleable nor ductile, and they do not conduct electricity. Most non-metals are brittle in nature.
    Examples: Phosphorus, hydrogen
  3. Metalloids: Metalloids are elements that show properties of both metals and non metals.
    Examples: Germanium, silicon
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अध्याय 2: Is Matter Around Us Pure - Very Short Answers [पृष्ठ ५८]

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लखमीर सिंग Chemistry Part 2 [English] Class 9
अध्याय 2 Is Matter Around Us Pure
Very Short Answers | Q 53.1 | पृष्ठ ५८

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Intermolecular space is maximum in .......... less in ............ and the least in .........


The inter-molecular force is maximum in


Solids have definite shape and definite volume. 


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Name a liquid which can be classified as a pure substance and conducts electricity.


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Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air


Give reason why graphite is used for making elecrode in a dry cell.


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“Is malleable and ductile” best describes :


There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.

  1. What type of substance could X be ? Name one substance like X.
  2. What type of substance could Y be ? Name one substance like Y.
  3. What type of substance could Z be ? Name one substance like Z.
  4. Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
  5. Name the three groups into which all the substances like Y are divided on the basis of their properties.

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Milk is a .................... solution but vinegar is a .................... solution.


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Name the property of one of the constituents which can be used to separate a mixture of salt and iodine


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Miscible liquids are separated by .....................


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Asmita went to buy an earthen pot. There she saw many things kept for sale.
From what substance has the potter made all the things?


Evaporation does form bubbles.


Define the term matter.


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