Advertisements
Advertisements
प्रश्न
Tick (√ ) the most appropriate answer.
Magnesium burns with a dazzling white flame to form magnesium oxide, a powdery mass. The colour of magnesium oxide is :
पर्याय
milk white
grey
silvery
yellow
Advertisements
उत्तर
milk white
APPEARS IN
संबंधित प्रश्न
What are the two ways in which nitrogen fixation occurs?
What do you observe when Calcium is heated and then tested with moist blue and red litmus – paper?
Fill in the blank
Aquatic plants and animals use _________ in water.
The diagrams below represents an experiment to show the presence of a component of air.
- State why air is sucked from – outlet ‘B’ and not from outlet “A”
- State why the air is sucked ‘slowly’ from the outlet “B”
- State the observation seen after completion of the experiment.
- State the reason for the above observation seen.
- Name another component which if present in air as a pollutant would have given a similar observation
Give word equation for the following conversion:
Nitric acid to soluble nitrates in the soil
Mention one necessary condition for the combustion to take place.
Why do traffic assistants wear a mask on duty?
Match the following
| 1. | Oxygen | a. | Carbon dioxide |
| 2. | Azote | b. | Nitrogen |
| 3. | Solvay process | c. | Vital life |
| 4. | Gun powder | d. | No life |
State whether the following statement is true or false. If false, correct them.
Air helps in the movements of sailing yachts and gliders but plays no role in the flight of birds and aeroplanes.
Explain the following observations very briefly
Breathing through mouth may harm you.
