Tag: chemical equilibrium and acids-bases

Questions Related to chemical equilibrium and acids-bases

Dissolution of salt participate in water shows:

chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

  1. Particulate nature of matter.

  2. Continuous nature of matter.

  3. Particle size of salt is very big.

  4. All of these.

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Correct Option: A
Explanation:

The salt will dissolve and water will taste salty. Salt particles dissolve in water because they occupy the spaces between the water molecules resulting in spreading of salt particles throughout the particles of water showing particle nature of matter.

An aqueous solution of zinc sulphate is acidic in nature because______.


chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

  1. $ZnSO _{4}$ ionizes

  2. $SO _{4}^{-2}$ reacts with $H _{2}O$

  3. $Zn^{+2}$ reacts with $H _{2}O$

  4. $Zn^{+2}$ & $SO^{-2} _{4}$ reacts with $H _{2}O$

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Correct Option: D

KMnO$ _4$ oxidises X$^{n+}$ ion to XO$^- _3$ itself changing into Mn$^{+2}$ in acid solution. $2.68$ $\times$ $10^{-3}$ mole of X$^{n+}$ requires $1.61$ $\times$ $10^{-3}$ mole of MnO$ _4^-$. The value of n is :

chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

  1. $1$

  2. $2$

  3. $4$

  4. $3$

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Correct Option: B

Which of the following does not undergo hydrolysis?

chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

  1. $BF _3$

  2. $NaCl _3$

  3. $NF _3$

  4. All of these

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Correct Option: C
Explanation:
$(C)\ NF _{3}$
Because it does not have any vacant orbitals to accept lone pair 
$\therefore $ do not under go nudolysis.






Solution of $ FeCI _3 $ and $ H _2O $ is :

chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

  1. Basic

  2. Acidic

  3. Neutral

  4. None of these

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Correct Option: B

Salt which on heating produces a mixture of two gases is :

chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

  1. $NaNO3$

  2. $Bi(NO3)3$

  3. $Pb(NO3)2$

  4. $NH4NO3$

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Correct Option: A

The mass in grams of potassium permanganate (MM = 158) crystals required to oxidise $750\,\,c{m^3}$ of 0.1 M Mohr's salt solution in acidic medium is about 

chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

  1. 11.8

  2. 5.8

  3. 6.0

  4. 2.4

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Correct Option: A

Degree of hydrolysis for a salt of weak acid and strong base can be changed by 

chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

  1. Increasing concentration of salt

  2. Increasing temperature

  3. Adding base

  4. All of these

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Correct Option: D

Chloride which is insoluble in water is :

chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

  1. sodium chloride

  2. potassium chloride

  3. mercurous chloride

  4. calcium chloride

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Correct Option: C
Explanation:

Chloride salts include sodium chloride (common salt), potassium chloride, calcium chloride, and ammonium chloride. Most chloride salts are readily soluble in water, but mercurous chloride (calomel) and silver chloride are insoluble, and lead chloride is only slightly soluble.

Does $Mg(OH) _2$ react with sodium hydroxide?

chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

A universal indicator is a pH indicator composed of a solution of several compounds that exhibits smooth colour changes over a pH value range from 1-14 to indicate the acidity or alkalinity of solutions. Two basic hydroxides do not react with each other as these are bases but not alkali.