हिंदी

Why is white phosphorus kept immersed under water?

Advertisements
Advertisements

प्रश्न

Why is white phosphorus kept immersed under water?

अति संक्षिप्त उत्तर
Advertisements

उत्तर

White phosphorus is kept immersed in water because it spontaneously ignites when exposed to air. But it does not react with water.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Metals and Non-metals - Exercise 1 [पृष्ठ १६६]

APPEARS IN

लखमीर सिंग Chemistry Part 2 [English] Class 10
अध्याय 3 Metals and Non-metals
Exercise 1 | Q 51. (b) | पृष्ठ १६६

संबंधित प्रश्न

Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.


Why is sodium kept immersed in kerosene oil?


Name two metals which form amphoteric oxides.


Name the metal which has been placed at the bottom of the reactivity series.


Name the metal which has been placed just below copper in the reactivity series.


Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.


Complete and balance the following equation:

\[\ce{Na + O2 ->}\]


Ordinary aluminium strips are not attacked by water because of the presence of a layer of ______ on the surface of aluminium.


Describe the reaction of potassium with water. Write the equation of the reaction involved.


Give one example, with equation, of the displacement of hydrogen by a metal from an acid.


Name two metals (other than zinc and iron) which can displace hydrogen from dilute hydrochloric acid?


What is the action of water on sodium? Write the equation of the chemical reaction involved.


Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?


Choose the correct alternative and rewrite the following:

Reaction of iron nails whith copper sulphate solution is an example of _____________________


Calcium floats over water during the reaction with water. Give reason.  


Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.


Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?

  1. Good thermal conductivity
  2. Good electrical conductivity
  3. Ductility
  4.  High melting point

Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?


Metals are generally solid. Which of the following metals is in the liquid state at room temperature?


Why is acidified water considered to be a good conductor of electricity?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×