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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

What Do You Observe When Magnesium Ribbon is Burnt in Oxygen. - Chemistry

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प्रश्न

What do you observe when Magnesium ribbon is burnt in oxygen.

उत्तर

Magnesium ribbon bums with a dazzling white light and produces a white powder which is magnesium oxide.
The reaction can be represented as
2Mg + O2 → 2MgO (white powder)

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पाठ 6: Chemical Reactions - Exercise 2 [पृष्ठ ८६]

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सेलिना Concise Chemistry [English] Class 8 ICSE
पाठ 6 Chemical Reactions
Exercise 2 | Q 7.5 | पृष्ठ ८६

संबंधित प्रश्‍न

Give one example each of which illustrates the following characteristics of a chemical reaction:

evolution of a gas


What do you observe when silver nitrate is added to a solution of sodium chloride?


What is meant by the metal reactivity series ? State its importance, (any two points).


Write a chemical equation for the following event.

Zinc oxide is dissolved in dilute hydrochloric acid.


Give a balanced equation for the reversible catalytic reaction involving nitrogen as one of the reactants.


Select the correct answer for the statement given below:

A neutral oxide which does not react with an acid or a base to give salt and water.


Complete the statement by filling in the blank with the correct word:

The metal which reacts with steam and the reaction is reversible is ________.


Compound X and aluminium are used to join railway tracks.

  1. Identify the compound X
  2. Name the reaction
  3. Write down its reaction.

Explain the following

  1. Reactivity of Al decreases if it is dipped in HNO3
  2. Carbon cannot reduce the oxides of Na or Mg
  3. NaCl is not a conductor of electricity in solid state whereas it does conduct electricity in aqueous solution as well as in molten state
  4. Iron articles are galvanised.
  5. Metals like Na, K, Ca and Mg are never found in their free state in nature.

Metal ‘A’ has electronic configuration 2, 8, 1 and metal ‘B’ has electronic configuration 2, 8, 8, 2. Out of these, which metal is more reactive? Write the reaction of this metal with dilute HCl acid.


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