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Oxyacids Of Sulphur

The total num...

Question

The total number of diprotic acids among the following is:
$H_{3} {P O}_{4}, H_{2} {S O}_{4}, H_{3} {P O}_{3}, H_{2} {C O}_{3}, H_{2} S_{2} O_{7}, H_{3} B O_{3}, H_{3} {P O}_{2}, H_{2} {C r O}_{4}, H_{2} {S O}_{3}$

A

5

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B

6

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C

7

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D

8

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Solution

The correct option is B $6$
$(B)$ $6$

$R e a s o n$ : Diprotic acids such as $H_{2} S O_{4}$ , $H_{2} C O_{3}$ , $H_{3} P O_{3}$ , $H_{2} S_{2} O_{7}$ , $H_{2} C r O_{4}$ , $H_{2} S O_{3}$ , are those which have two acidic hydrogen atoms.

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Q. Three reactions involving

H_{2} {P O}_{4}^{-}

are given below:
(i)

H_{3} {P O}_{4} + H_{2} O \to H_{3} O^{+} + H_{2} {P O}_{4}^{-}

H_{2} {P O}_{4}^{-} + H_{2} O \to H {P O}_{4}^{2 -} + H_{3} O^{+}

H_{2} {P O}_{4}^{-} + {O H}^{-} \to H_{3} {P O}_{4} + O^{2 -}

H_{2} O + H_{3} {P O}_{4} ⇌ H_{3} O^{+} + H_{2} {P O}_{4}^{-}; p K_{1} = 2.15

H_{2} O + H_{2} {P O}_{4}^{-} ⇌ H_{3} O^{+} + H_{2} {P O}_{4}^{2 -}; p K_{2} = 7.20

0.01 M

N a H_{2} {P O}_{4}

H_{2} {S O}_{4}

H_{3} {P O}_{4}

are neutralized separately by the same amount of an alkali when sulphate and dihydrogen phosphates are formed respectively.Find the ratio of the masses of

H_{2} {S O}_{4}

H_{3} {P O}_{4}

H_{2} {S O}_{4}

H_{3} {P O}_{4}

are neutralized separately by the same amount of an alkali when sulphate and dihydrogen orthophosphate are formed, respectively. Find the ratio of the masses of

H_{2} {S O}_{4}

H_{3} {P O}_{4}

Q. Arrange the following compounds in increasing order of their boiling points:

C H_{3} C H_{2} C H_{2} CHO, C H_{3} C H_{2} C H_{2} CH_{2} OH, C_{2} H_{5} O C_{2} H_{5}, C H_{3} C H_{2} C H_{2} C H_{3}

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