NCERT Solutions for class 12 Chemistry Chapter 2:  Solutions

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NCERT Solutions for class 12 chemistry chapter 2: Solutions are provided in this article which includes important formulas, chemical equations and numericals. Some of the important topics of Class 12 Chemistry Chapter 2 Solutions include:

Expected No. of questions: 2 to 4 questions of 1 to 5 marks

Download PDF: NCERT Solutions for Class 12 Chemistry Chapter 2 pdf


NCERT Solutions for Class 12 Chemistry Chapter 2

The NCERT solutions for class 12 chemistry chapter 2: Solutions is given below in pdf as well as image form. 

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NCERT Solutions for Class 12 Chemistry Chapter 2: Solutions – Important Topics

A Solution is a homogeneous mixture of two or more chemically non-reacting substances whose composition can be varied within certain limits. A solution is regarded as a simple phase having more than one component.  

  • Types of Solutions: Based on the states of matter, solutions can be divided into solid solutions, liquid solutions and gaseous solutions.

Solid Solutions: The solvent is in solid state

Liquid Solutions: The solvent is in liquid state

Gaseous Solutions: The solvent is in gaseous state

  • Solubility: The amount of solute that can dissolve in a solvent to form a solution is called solubility. Solubility depends on factors like temperature, pressure, nature of solvent and solute.

Unsaturated Solution: A solution in which more solute can be added at a given temperature.

Saturated Solution: A solution in which no more solute can be added at a given temperature.

Supersaturated solution: A solution in which more solute than the limited amount is present at a given temperature.

Concentration of Solution: The ratio of the solute to the solvent is known as concentration of a solution

Henry’s Law: Henry’s Law states that the partial pressure (p) of the gas in the vapour phase is proportional to the mole fraction (x) of the gas in the solution. Mathematically,

p = KH. x

Raoult’s Law: Raoult’s Law states that the Partial vapour pressure of every component in a solution is directly proportional to the mole fraction of that component. Mathematically,

P = P0X


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CBSE CLASS XII Related Questions

1.
Write the Nernst equation and emf of the following cells at 298 K : 
(i) Mg(s) | Mg2+ (0.001M) || Cu2+(0.0001 M) | Cu(s) 
(ii) Fe(s) | Fe2+ (0.001M) || H+ (1M)|H2(g)(1bar) | Pt(s) 
(iii) Sn(s) | Sn2+(0.050 M) || H+ (0.020 M) | H2(g) (1 bar) | Pt(s) 
(iv) Pt(s) | Br2(l) | Br-  (0.010 M) || H+ (0.030 M) | H2(g) (1 bar) | Pt(s).

      2.

      Discuss briefly giving an example in each case the role of coordination compounds in:

      1. biological systems
      2. medicinal chemistry
      3. analytical chemistry
      4. extraction/ metallurgy of metals

          3.

          How would you account for the following: 

          1. Of the d4 species, Cr2+ is strongly reducing while manganese(III) is strongly oxidising. 
          2. Cobalt(II) is stable in aqueous solution but in the presence of complexing reagents it is easily oxidised. 
          3. The d1 configuration is very unstable in ions.

              4.
              A solution of Ni(NO3)2 is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?

                  5.

                  Comment on the statement that elements of the first transition series possess many properties different from those of heavier transition elements.

                      6.
                      Depict the galvanic cell in which the reaction Zn(s) + 2Ag+(aq) → Zn2+(aq) + 2Ag(s) takes place. Further show: 
                       (i) Which of the electrode is negatively charged? 
                       (ii) The carriers of the current in the cell. 
                       (iii) Individual reaction at each electrode.

                          CBSE CLASS XII Previous Year Papers

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