When a lot of dry powder of a substance X is released over a fire, the

1.	When a lot of dry powder of a substance X is released over a fire, the fire gets extinguished(a) Name the substance X.(b) How does this substance extinguish the fire(c) Name another susbtance which behaves like X.
Answer» 1) Dry ice2) Solid CO2 is called Dry Ice powder. When it is sprayed over fire, then it immediately vaporizes. It shields fresh air from the burning substance. It is heavier than Oxygen. So CO2 stays closer to the burning substance. 3) There are other substances like : Salt Na Cl, Copper salt power, Barium Chloride powder . They are usable too. They form a crust layer on the top of metals which are burning. Then shield them from Oxygen.

When a lot of dry powder of a substance X is released over a fire, the fire gets extinguished(a) Name the substance X.(b) How does this substance extinguish the fire(c) Name another susbtance which behaves like X.

Answer»

1) Dry ice2) Solid CO2 is called Dry Ice powder. When it is sprayed over fire, then it immediately vaporizes. It shields fresh air from the burning substance. It is heavier than Oxygen. So CO2 stays closer to the burning substance.

3) There are other substances like : Salt Na Cl, Copper salt power, Barium Chloride powder . They are usable too. They form a crust layer on the top of metals which are burning. Then shield them from Oxygen.

Discussion

No Comment Found

Related InterviewSolutions

ne Henry's law and give its two applications
25. When 2 gm of a gas A is introduced into an evaluated flaskkept at 25Â°C, the pressure is found to be one atmosphere. If3 gm of another gas B is then added to the same flask, thetotal pressure becomes 1.5 atm. Assuming ideal gasbehaviour, calculate the ratio of the molecular weightsA.B
3.Write any two applications of osmotic pres
8.What are the harmful effects of plastics especially plastic bags?
8. What are the harmful effects of plastics especially plastic bags?
14. In a group of 50 persons, 14 drink tea but not coffee and 30 drink tea. Find ((0) Hormany drink tea and coffee both () How many drink coffee but not tea.
Write the mechanisms and applications(a) Mannich reaction
Why Solids, Liquids and Gases Have Different Properties
the galvanised article is protected against rusting even if the zinc coating is broken . reason this out???
How glass wool is prepared ? Give itsapplications based on two different properties.(Ans. : Refer Section 3.3.3)

When a lot of dry powder of a substance X is released over a fire, the fire gets extinguished(a) Name the substance X.(b) How does this substance extinguish the fire(c) Name another susbtance which behaves like X.

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment