मराठी

Why is White Phosphorus Kept Immersed Under Water? - Science

Advertisements
Advertisements

प्रश्न

Why is white phosphorus kept immersed under water?

Advertisements

उत्तर

White phosphorus is kept immersed in water because it starts burning spontaneously when it comes into contact with air. But it does not react with water.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 3: Metals and Non-metals - Exercise 1 [पृष्ठ १३४]

APPEARS IN

लखमीर सिंह Chemistry (Science) [English] Class 10
पाठ 3 Metals and Non-metals
Exercise 1 | Q 51.2 | पृष्ठ १३४

संबंधित प्रश्‍न

_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3


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


Write equation for the reaction of magnesium with oxygen.


Which of the following elements would yield an acidic oxide.

Na, S, C, K, H


What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.


Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.


Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.


How do non-metals react with hydrogen? Explain with an example.


Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium.


Which gas is produced when dilute hydrochloric acid is added to a reactive metal?


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


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


What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.


Write the equation for the reaction of Aluminium with dilute hydrochloric acid.

Name the products formed. Also indicate the physical states of all the substances involved.


An acidic oxide is produced by the element:
(a) Na
(b) C
(c) Ca
(d) H


An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus


An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be:
(a) S
(b) Ca
(c) C
(d) Ag


Choose the correct alternative and rewrite the following:

Which of the following is lue in colour?


Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.


Find the odd one out:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×