Advertisements
Advertisements
प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
The rust formed on the surface of iron easily crumbles.
विकल्प
True
False
Advertisements
उत्तर
True.
APPEARS IN
संबंधित प्रश्न
Define the term acid rain.
A metal highly resistant to rusting.
A mixture of oxygen and carbon dioxide used for artificial respiration.
What do you observe when Magnesium is heated and then tested with moist blue and red litmus – paper?
Write ‘True’ or ‘False’ in front of following statement.
Nitrogen is a gaseous non-metal essential for respiration.
What happens when Iron burns in oxygen ? Also give the balanced chemical equation for the reaction.
State how nitrogen is utilised by plants for their growth. Give a reason why nitrogen is used in flushing food packages.
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
Name the catalyst used in the preparation and state it’s function.
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.
Match the following
| 1. | Burning of meteors | a. | Exosphere |
| 2. | Weather change | b. | Stratosphere |
| 3. | Lowest temperature | c. | Mesosphere |
| 4. | Ozone layer | d. | Troposphere |
