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Chemical Reactivity (Group 1)

The pair of c...

Question

The pair of compounds which cannot exist together in solution is

A

NaHCO₃ and NaOH

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B

NaHCO₃ and H₂O

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C

NaHCO₃ and Na₂CO₃

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D

Na₂CO₃ and NaOH

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Solution

The correct option is A
NaHCO₃ and NaOH

$N a H C O_{3}$ is an acidic salt which can react with $N a O H$ to give $N a_{2} C O_{3}$ . Hence they can't be found together.

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Similar questions

Q. A mixture of

N a H C O_{3}

N a_{2} C O_{3}

weighed .0235 g. The dissolved mixture was reacted with excess of

8 a (O H)_{2}

2.1028 g B a C O_{3}

, by the following reactions:

N a_{2} C O_{3} + B a (O H)_{2} \to B a C O_{3} + 2 N a O H

N a H C O_{3} + B a (O H)_{2} \to B a C O_{3} + N a O H + H_{2} O

What was the percentage of

N a H C O_{3}

in the original mixture ?

Q. A 2 g sample containing

N a_{2} C O_{3}

N a H C O_{3}

loses 0.62 g when heated to

300^{o} C,

the temperature at which

N a H C O_{3}

N a_{2} C O_{3}, C O_{2}

H_{2} O .

What is the percentage of

N a_{2} C O_{3}

in the given mixture.

2.0

g sample containing

{N a}_{2} C O_{3}

N a H C O_{3}

0.248

g when heated to

300

^{o} C

, the temperature at which

N a H C O_{3}

{N a}_{2} C O_{3}, C O_{2}

H_{2} O

%

{N a}_{2} C O_{3}

in the mixture is (as the nearest integer):

Q. A sample contains a mixture of

N a H C O_{3}

N a_{2} C O_{3}

H C l

15.0

g of the sample yielding

11.0

N a C l

. What percent of the sample is

N a_{2} C O_{3}

?
Reactions are:

N a_{2} C O_{3} + 2 H C l \to 2 N a C l + C O_{2} + H_{2} O

N a H C O_{3} + H C l \to N a C l + C O_{2} + H_{2} O

Molecular weight of

N a C l

N a H C O_{3}

N a_{2} C O_{3}

58.5

84

106

g/mol respectively.

On passing $C O_{2}$ , through concentrated solution of $N a_{2} C O_{3}$ gives

$N a_{2} C O_{3} + H_{2} O + C O_{2} \to$ ___

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