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'A' and 'B' are compounds of sodium. 'A'...

 'A' and 'B' are compounds of sodium. 'A' is thermally stable. On passing `CO_(2)` through the solution of 'A', 'B' is formed. 'B' on heating gives 'A'. Phenolphthalein is added to the aqueous solution of 'A' and 'B'. The colours of solutions are

A

Colouress, Colourless

B

Pink, Colourless

C

Colourless, Pink

D

Pink, pink

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The correct Answer is:
B
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AAKASH SERIES-ALKALI METALS-OBJECTIVE EXERCISE - 2
  1. The number of hydroxide ions produced by one molecule of Na(2)CO(3) on...

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  2. The cathode in middle compartment of Castner-Kellner process is

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  3. 'A' and 'B' are compounds of sodium. 'A' is thermally stable. On passi...

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  4. Sodium is heated in air at 300^(0)C to form X, X absorbs CO(2) and for...

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  5. The most basic oxide amongst the following

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  6. Alkali metals are so named because

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  7. Sodium metal preserved under kerosine. This is to prevent

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  8. Wrong reaction of the following

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  9. The following some statments about IA group elements i) The redioact...

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  10. Which of the following substances of lithium is most stable ?

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  11. When a substance 'A' reacts with water it produces combustible gas B a...

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  12. Which of the following hydrogen compounds is most ionic ?

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  13. Sodium metal itself is used as

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  14. Which of the following metal pairs liberate H(2) with NaOH

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  15. The number of possible resonance forms for superoxide ion is

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  16. Which of the following pair cannot exist together in solution ?

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  17. The least soluble alkali metal carbonate is

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  18. Which one of the following decomposes easily on heating ?

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  19. Except LiNO(3), Nitrates of IA group on heating give

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  20. Correct statement of the following is

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