NCERT Solutions for class 11 Chemistry Chapter 2: Structure of Atom

NCERT Solutions for class 11 Chemistry Chapter 2 Structure of Atom are provided in the article. Some of the important topic cover under Structure of atom chapter includes:

  1. Subatomic Particles
  2. Nucleus
  3. Discovery of Electron
  4. Atomic Orbitals
  5. Hund’s Rule
  6. The Electronic Configuration
  7. Shapes of Atomic Orbitals

Expected no.of questions: 3 to 6 questions of total 9 marks

Download PDF: NCERT Solutions for Class 11 Chemistry Chapter 2 PDF


NCERT Solutions for Class 11 Chemistry Chapter 2

NCERT Solutions for class 11 Chemistry Chapter 2 Structure of Atom PDF is given below.

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Class 11 Chemistry Chapter 2 Structure of Atom – Important Topics

Atom consists of three subatomic particle – Protons, Neutrons and Electrons.

  • Protons: These are positively charged particles which are present in the nucleus.
  • Neutrons: These are neutral particles which are present in the nucleus.
  • Electrons: These are negatively charged particles which revolve around the nucleus. 

Atomic Number of an element is the number of electrons or protons in the atom. The elements in the periodic table are arranged according to the atomic numbers.

Mass Number of an element is the total mass of the nucleon (protons+neutrons) present in an atom. Since electrons are very light, their mass is negligible.

Some of the important atomic models are:

Electrons are filled in orbitals revolving around the nucleon. From lower to higher energy levels, shells are always filled in a step-by-step manner. Electrons aren't filled in following shell until shells before it have been filled.

Electrons in the outermost shell are called valence electrons. These determine the affinity of an element to combine with other elements.


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CBSE CLASS XII Related Questions

  • 1.
    Following reaction takes place in one step :
    \( 2A + B \rightarrow 2C \)
    How will the rate of above reaction change if the volume of the reaction vessel is decreased to one third of its original volume? Will there be any change in the order of reaction with the reduced volume?


      • 2.
        A coordination compound CrCl\(_3 \cdot 6H_2O\) is mixed with excess AgNO\(_3\) solution, two moles of AgCl are precipitated per mole of the compound. Write the structural formula of the coordination compound.


          • 3.
            The rate for the following reaction is given by: \[ A + B \rightarrow C, \quad \text{Rate} = k[A][B]^2 \] How is the rate affected if we double the concentration of B?


              • 4.
                Consider the following reaction: \[ \text{Zn}_{(s)} + \text{Ag}_2\text{O}_{(s)} + \text{H}_2\text{O}_{(l)} \rightarrow \text{Zn}^{2+}_{(aq)} + 2\text{Ag}_{(s)} + 2\text{OH}^-_{(aq)} \] Given: \[ E^\circ_{\text{Ag}^+/\text{Ag}} = 0.80 \text{ V} \] \[ E^\circ_{\text{Zn}^{2+}/\text{Zn}} = -0.76 \text{ V} \] \[ 1F = 96500 \text{ C mol}^{-1} \] $\Delta G^\circ$ for above reaction is:

                  • $-301.080 \text{ kJ mol}^{-1}$
                  • $+310.080 \text{ kJ mol}^{-1}$
                  • $-326.070 \text{ kJ mol}^{-1}$
                  • $375.060 \text{ kJ mol}^{-1}$

                • 5.
                  From the given data of \(E^{\circ}\) values, answer the following questions :
                  (I) Why \(E^{\circ}_{M^{2+}/M}\) show irregular trend in the above values ?
                  (II) Why is \(E^{\circ}_{Cu^{2+}/Cu}\) value exceptionally positive ?
                  (III) Why \(E^{\circ}_{Mn^{2+}/Mn}\) value is highly negative ?


                    • 6.
                      Which of the reactions is used in the conversion of a ketone into hydrocarbon?

                        • Reimer-Tiemann reaction
                        • Wolff-Kishner reduction
                        • Aldol condensation
                        • Stephen reaction
                      CBSE CLASS XII Previous Year Papers

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