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The pair of compounds which cannot exist...

The pair of compounds which cannot exist together in aqueous solution is:
`(I) NaH_(2)PO_(4)` and `NaHCO_(3)" "(II) Na_(2)CO_(3)` and `NaHCO_(3)`
`(III) NaOH` and `NaH_(2)PO_(2)" "(IV) NaHCO_(3)` and `NaOH`

A

`I, II, III`

B

`II, III`

C

`I, IV`

D

only `IV`

Text Solution

Verified by Experts

The correct Answer is:
D
Acidic salt `NaHCO_(3)` and `NaOH` (base) react with each other so they cannot exist together in aqueous solution.
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The pairs of compounds which cannot exist together in aquous solution are: (I) NaH_(2)PO_(4) and Na_(2)HCO_(3) (II) Na_(2)CO_(3) and NaOH (III) NaOH and NaH_(2)PO_(4) (IV) NaHCO_(3) and NaOH

NaHCO_(3) and NaOH cannot exist together in solution. Why ?

Which of the following pair of solutions does not form a buffer solution? (A) NaH_(2)PO_(4) and Na_(2)HPO_(4) (B) H_(2)CO_(3) and NaHCO_(3) (C) NH_(4)OH and NH_(4)Cl (D) KOH and K_(2)SO_(4)

Which of the following salt/s of H_(3)PO_(3) exists ? (I)) NaH_(2)PO_(3) (II) Na_(2)HPO_(3) (III) Na_(3)PO_(3)

P_(4)+NaOH to PH_(3) uarr+NaH_(2)PO_(2)

BANSAL-S BLOCK-Exercise-1
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  2. (i) A+Na(2)CO(3) rarr B+C (ii) A overset(CO(2))(rarr) ("Milky")C T...

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  3. CsBr(3) contains

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  4. Which of the following statement is false

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  5. Na+Al(2)O(3) overset("High temperature")(rarr)X underset("water")overs...

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  6. Mg(2)C(3) reacts with water forming propyne. C(3)^(4-) has

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  7. ("White ppt")D underset(dil. H(2)SO(4))overset(Na(2)CO(3))(larr) under...

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  8. Li does resemble other alkali metals in following properties:

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  9. The pair of compounds which cannot exist together in aqueous solution ...

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  10. Crown ethers and cryptands form

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  11. Calcium imide on hydrolysis will give gas (B) which on oxidation by be...

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  12. The commercial method of preparation of potassium by reduction of molt...

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  13. Choose the correct alternate (s). (I) BeCO(3) is kept in the stmosph...

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  14. Nitrogen dioxide can not be obtained from

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  15. When conc. H(2)SO(4) was treated with K(4) [Fe(CN)(6)], CO has was evo...

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  16. A solution of metal hydroxide (MOH) with copper sulphate and mixed tar...

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  17. Which of the following statement is false

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  18. Which of the following is not a water softener?

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  19. Which of the following gases are evolved by the electrolysis of aqueou...

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  20. Which of the following option is incorrect regarding the property of '...

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