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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

The pKb of weak base BOH [Kb(BOH) = 1 × 10-5] will be ______.

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प्रश्न

The pKb of weak base BOH [Kb(BOH) = 1 × 10-5] will be ______.

पर्याय

  • -5

  • 5

  • 1

  • 10-5

MCQ
रिकाम्या जागा भरा
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उत्तर

The pKb of weak base BOH [Kb(BOH) = 1 × 10-5] will be 5.

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पाठ 3: Ionic Equilibria - Multiple choice questions

संबंधित प्रश्‍न

A solution of NH4Cl and NH4OH acts as a buffer.


Cu is precipitated as CuS while  Zn is not precipitated when H2S is passed through an acidic solution of Cu(NO3 )2  and Zn(NO3)2 respectively.


Answer the following in one sentence :

Write one property of a buffer solution.


Answer the following in one sentence :

Classify the following buffers into different types :

CH3COOH + CH3COONa


Answer the following in one sentence :

Classify the following buffers into different types :

Sodium benzoate + benzoic acid


In biochemical system, pH of blood in our body is maintained due to the following buffer:


Name the buffer which is used to maintained pH of 8 to 10 for precipitation of cations III A group in qualitative analysis.


Write the formula to calculate pH of buffer solution.


Define buffer solution.


Explain the types of buffer solutions.


Write one application of the following buffer:

Citrate buffer


Veronal is used as a/an ______.


What is the pH of 0.5 litre buffer solution containing 0.01 mole of CH3COOH and 0.01 mole of CH3COONa?

[pKa of acid = 4.74]


Which will make basic buffer?


The dissociation constant of a weak acid is 1 × 10−3. In order to prepare a buffer solution with a pH = 4, the `(["Acid"])/(["Salt"])` ratio should be ____________.


The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by ____________.


On the basis of the equation \[\ce{pH}\] = – log \[\ce{[H+]}\], the \[\ce{pH}\] of 10–8 mol dm–3 solution of \[\ce{HCl}\] should be 8. However, it is observed to be less than 7.0. Explain the reason.


Assertion (A): A solution containing a mixture of acetic acid and sodium acetate maintains a constant value of \[\ce{pH}\] on addition of small amounts of acid or alkali.

Reason (R): A solution containing a mixture of acetic acid and sodium acetate acts as a buffer solution around \[\ce{pH}\] 4.75.


Which of the following combinations will constitute a buffer solution?


Define Acidic buffer solution.


Calculate pKa of HF if Ka= 7.2 x 10-4.


Explain buffer action of sodium acetate-acetic acid buffer.


What is the pH of buffer solution prepared by mixing \[\text{0.2MNH4OHand0.4MNH4Cl}\] solution. \[(\mathrm{pK_{b}~of~NH_{4}OH=4.620})\]


A buffer solution is prepared by mixing 0.01 М HCN and 0.02 M sodium cyanide. If pKa for HCN is 5.20, what is the pH of solution?


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