When a metal of Group 1 was dissolved in liquid ammonia The following observations were obtained?
When a metal of group 1 was dissolved in liquid ammonia, the following observations were obtainedi Blue solution was obtained initially. ii On concentrating the solution, Blue colour changed to bronze colour.
When a metal of Group 1 was dissolved in liquid ammonia The following observations were obtained a blue solution was obtained initially?
What is the observation when an alkali metal is added to liquid ammonia?
What happens when alkali metals are dissolved in ammonia?
When a metal of Group I was dissolved in liquid ammonia a blue colour solution is obtained Why?
What is the reason for the increasing stability of peroxide and superoxide of alkali metals down the group?
Solution : The stability of peroxide or superoxide increases as the size of metal ion increases i.e., `KO_(2) lt RbO_(2) lt CsO_(2)` ltbr. The reacivity of alkali metals towards oxygen to form different oxides is due to strong positive field around each alkali metal cation.
Why alkali metals impart colour to the flame?
Alkali metals have low ionization enthalpies. Their valence electrons easily absorb energy from the flame and are excited to higher levels. When these electrons return to the ground state, the energy is emitted in form of tight. Was this answer helpful?
How do you account for the blue colour of the solution?
Account for the following: Blue coloured solutions are obtained when alkali metals are dissolved in liquid ammonia.
Which of the following compounds does not exist in solid state normally?
LiHCO3 does not exist in solid state. This is because Li+ cation has highest hydration enthalpy. So, they do not exist in solid state.
How do you account for the strong reducing power of lithium in aqueous solution?
How do you account for the strong reducing power of lithium in aqueous solution? Li ions, due to small size, have high enthalpy of ionization and hydration. In aqueous solution, high hydration enthalpy predominates, and Li loses electrons and has strong reducing power.
Why are lithium salts commonly hydrated?
Lithium is known to have the smallest size among all alkali metals. This is the primary reason why the Li+ ion has the ability to polarize water molecules more easily when compared to other alkali metals.
How do first group elements react with ammonia and give blue?
When alkali metals are dissolved in liquid ammonia they give blue colored conducting solution. This solution contain ammoniated electron which absorbs light in visible region and impart blue color to the solution. This solution is paramagnetic.
Which one of the following alkali metal gives hydrated salts?
Solution : Li, Explanation: Among all the alkali metal ions, `Li^(+)` is the smallest and thus it has the highest charge density. As a result,`Li^(+)` attracts water molecules more strongly than any ther alkali metal cation and forms hydrated salts.
What is the difference between lithium and other alkali metals?
The key difference between Lithium and other alkali metals that we can tell is that the lithium is the only alkali metal that can react with nitrogen whereas the other alkali metals cannot undergo any reaction with nitrogen. Moreover, lithium cannot form an anion while other alkali metals can form anions.
Why are lithium salts mostly hydrated?
Lithium is known to have the smallest size among all alkali metals. This is the primary reason why the Li+ ion has the ability to polarize water molecules more easily when compared to other alkali metals.
Why is sodium metal tarnished in air?
Why does sodium metal get tarnished in air? Answer – Sodium tarnish in air due to the formation of layer of sodium carbonate by the reaction with moist air.
When a metal of Group 1 was dissolved in liquid ammonia The following observations were obtained?
When a metal of group I was dissolved in liquid ammonia, the following observations were obtained : (i) Blue solution was obtained initially. (ii) On concentrating the solution, the blue colour changed to bronze colour.
When a metal of Group I was dissolved in liquid ammonia The following observations were obtained?
When a metal of group 1 was dissolved in liquid ammonia, the following observations were obtained <br> (a) Blue solution was obtained initially. <br> On concentrating the solution, blue colour changed to bronze colour.
Which of the following elements occurs as a gas at room temperature?
Elemental hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F, element 9), and chlorine (Cl, element 17) are all gases at room temperature, and are found as diatomic molecules (H2, N2, O2, F2, Cl2).
When alkali metals are exposed to air gets tarnished in air?
When exposed to air, the alkali metals tarnish quickly. This is because, they react with oxygen, moisture and carbon dioxide present in air to form oxides, hydroxides and carbonates.
When heated in air the alkali metals form various oxides?
1 Answer. The reactivity of alkali metals towards oxygen increases down the group as the atomic size increases. Thus, Li forms only lithium oxide (Li 2O), sodium forms mainly sodium peroxide (Na 2O 2) along with a small amount of sodium oxide while potassium forms only potassium superoxide (KO 2).