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Which of the following about solution lf...

Which of the following about solution lf alkali metals in lioquid ammonia is correct ?

A

The solutions have strong ozidizing properties.

B

Both the dilut solution as well as concentrated solution are paramagntic in nature.

C

Colour of the solution is attributed to charge transfer spectrum.

D

None of these

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The correct Answer is:
D
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All alkali metals dissolve in anhydrous liquid ammonia to give blue colour solution. It is the ammoniated electron which is reponsible for the blue colour of the solution, and the electrical conductivity is due to the ammoniated cation, [M(NH_(3))_(x)]^(+) as well as the ammoniated electron, [e(NH_(3))_(y)]^(-) , value of x and y depend on the extent of solvation by NH_(3) . Dilute solutions are paramagnetic due to free ammoniated electrons. Q. Which of the following statement about solution of alkali metals in liquid ammonia is correct?

The alkali metals dissolve in ammonia to give a deep blue solution which is conducting in nature. M+(x+y)NH_3rarr[M(NH_3)_x]^(2+)+2[e(NH_3)_y]^(-) Which of the following is not true about the solutions of alkli metals in liquid ammonia ?

Which of the following is not true about alkali metals?

Which of the following is radioactive alkali metal ?

Which of the following statement about the isolation of alkali metals is true ?

NARAYNA-S-BLOCK ELEMENTS-Level V-(ONLY ONE ANSWER CORRECT )
  1. Which of the following increases in magnitude as the atomic number of ...

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  2. Alkali metals give coloue in Bunsen flame due to :

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  3. Which of the following about solution lf alkali metals in lioquid ammo...

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  4. Select the incorrect statement :

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  5. Consider the following statements, S(1) : Alkali metals are never fo...

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  6. Which of the following has the highest reactivity towards water?

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  7. Sodium burns in dry air to give :

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  8. Alkali metals are characterised by

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  9. In view of their low ionisation energies, the alkali metals are

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  10. Carbon can be oxidised to C(2) while heating its powder with :

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  11. What happens when sodium metal is heated in axcess of dry air containi...

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  12. Solution of K(2)O in water in basic, because it contains a significant...

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  13. Which of the following oxides is formed when potassium metal is burnt ...

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  14. On commercial scale, sodium hydroxide is prepared by :

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  15. Which of the following gives sodium hydroxide along with hydrogen gas ...

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  16. Sodium when heated in air at 350^(@)C forms compound X.X obsorbs CO(2)...

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  17. When ionic nitrides react with water, the products are :

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  18. Low solubility of CsI in water is due to :

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  19. Select the correct statement.

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  20. NaNO(3) is not used as gun powder because it is

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