मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to ______.

Advertisements
Advertisements

प्रश्न

When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to ______.

पर्याय

  • ammoniated electron

  • sodium ion

  • sodium amide

  • ammoniated sodium ion

MCQ
Advertisements

उत्तर

When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to ammoniated electron.

Explanation:

The alkali metals dissolve in liquid ammonia and give a blue solution, which is conductive in nature. A solution of sodium in liquid ammonia at − 30°C conducts electricity. The ammoniated electrons are responsible for the blue color of the solution as they absorb energy in the visible region of light and impart blue color to the solution.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 10: The s-block Elements - Multiple Choice Questions (Type - I) [पृष्ठ १२७]

APPEARS IN

एनसीईआरटी एक्झांप्लर Chemistry [English] Class 11
पाठ 10 The s-block Elements
Multiple Choice Questions (Type - I) | Q 12 | पृष्ठ १२७

संबंधित प्रश्‍न

Discuss the general characteristics and gradation in properties of alkaline earth metals.


Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?


Which of the following has the highest hydration energy


Assertion: Generally alkali and alkaline earth metals form superoxides.

Reason: There is a single bond between O and O in superoxides.


In context with beryllium, which one of the following statements is incorrect?


Write a balanced chemical equation for the following chemical reaction.

Rubidium with oxygen gas


Substantiate Lithium fluoride has the lowest solubility among group one metal fluorides.


Beryllium halides are covalent whereas magnesium halides are ionic why?


Alkaline earth metal (A), belongs to 3rd period reacts with oxygen and nitrogen to form compound (B) and (C) respectively. It undergoes metal displacement reaction with AgNO3 solution to form compound (D). Identify A, B, C and D.


The reducing power of a metal depends on various factors. Suggest the factor which makes Li, the strongest reducing agent in aqueous solution.


Identify the correct formula of halides of alkaline earth metals from the following.

(i) BaCl2.2H2O

(ii) BaCl2.4H2O

(iii) CaCl2.6H2O

(iv) SrCl2.4H2O


Name an element from Group 2 which forms an amphoteric oxide and a water soluble sulphate.


Discuss the trend of the following:

The solubility and the nature of oxides of Group 2 elements.


Why are BeSO4 and MgSO4 readily soluble in water while CaSO4, SrSO4 and BaSO4 are insoluble?


What is the structure of BeCl2 molecule in gaseous and solid state?


An element of group 2 forms covalent oxide which is amphoteric in nature and dissolves in water to give an amphoteric hydroxide. Identify the element and write chemical reactions of the hydroxide of the element with an alkali and an acid.


Given below are two statements:

Statement I: Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.

Statement II: Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.

In the light of the above statements, choose the most appropriate answer from the options given below.


PbCl4 exists but PbBr4 and Pbl4 do not because of ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×