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ICSE Class 8 Answered

what are oxidesaa? write an account of different classes of oxides with example.
Asked by nathsantanukumar | 11 May, 2018, 07:26: PM
answered-by-expert Expert Answer
Oxides:
An oxide is a chemical compound that contains at least one oxygen atom and one other element in its molecular formula.
The formula of oxide is O2- .
 

Metals

 Reaction:

Magnesium combines with oxygen to form white-colored magnesium oxide with the liberation of some amount of heat.

                            2Mg + O2 → MgO + heat

                                                Magnesium oxide

Non-metals

carbon has burnt in oxygen gas to produce carbon dioxide gas along with some heat.

                         C + O2 →  CO2 + heat

                                       Carbon dioxide

Hydrocarbons

  • Take a candle and fix it on a wooden table. Light the candle and let it burn for a while.
  • Invert a glass on the burning candle.
  • The candle burns for a few seconds and then goes off. The candle needed oxygen present in the air.
  • This shows that when the oxygen in the air within the glass was used up, the flame was extinguished.

 

                                                              CxHy   +  O →  CO2  +  H2

                                                         Hydrocarbon

                                                            (candle)

Answered by Ramandeep | 14 May, 2018, 11:53: AM
ICSE 8 - Chemistry
Asked by nathsantanukumar | 11 May, 2018, 07:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
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