Advertisements
Advertisements
प्रश्न
What is rusting?
Advertisements
उत्तर
The slow conversion of iron into its hydrated ferric oxide, in the presence of moisture and air is called rusting.
Fe2O3 + xH2O → Fe2O3.xH2O
Ferric oxide Water Hydrated ferric oxide
(rust)
APPEARS IN
संबंधित प्रश्न
State at least two ways of prevent rusting.
Fill in the blanks :
Oxides of sulphur and nitrogen combine with rain water to form ___________ and _________ which cause ____________.
State four ways of preventing rusting.
Describe simple experiments to show the presence of -
water vapour in air using a glass tumbler and ice.
Identify the acidic oxides responsible for acid rain. State how their presence results in formation of acid rain. Give a reason why acid rain damages heritage buildings.
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
Draw a neat labelled diagram for the method used in the above preparation.
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
State the word equation for the reaction involving the above preparation of oxygen.
What is meant by burning?
A process without emitting flame is called as ______.
Match the following
| 1. | Burning of meteors | a. | Exosphere |
| 2. | Weather change | b. | Stratosphere |
| 3. | Lowest temperature | c. | Mesosphere |
| 4. | Ozone layer | d. | Troposphere |
