NCERT Solutions For Class 11 Chemistry Chapter 3: Classification of Elements and Periodicity in Properties

NCERT Solutions for class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties are provided in this article. Some of the important topics in Classification of Elements and Periodicity in Properties chapter include:

Expected no. of questions: 2 to 4 questions of total 6 marks.

Download PDF: NCERT Solutions for Class 11 Chemistry Chapter 3 PDF

NCERT Solutions for Class 11 Chemistry Chapter 3

NCERT Solutions for Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties is given below.

Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties –Important Topics

Some of the classification of elements done by scientist before the origin of periodic table were as follows.

Dobereriener’s Triads: Three elements have same physical and chemical properties were grouped together and arranged in a form of an increasing atomic mass.
Newlands Law Of Octaves: This law states that whenever elements are arranged in ascending atomic masses, then the eighth and the first element will show the same property and this law is even similar to a musical note.
Mendeleev’s Periodic Table: This periodic table is arranged based on the increasing amount of atomic masses of elements.

According to modern periodic table, elements can be classified into four types.

S block Elements - They belong to Group 1 and 2 and have alkali metals and alkali earth metals.
P block Elements- They belong to Group 13-18 and contain representative and main group elements.
D block Elements - They belong to Group 3-12 and contain transition elements.
F block Elements - They are Lanthanides and actinides(4f and 5f) type of elements and are inner transition metals.

Periodic Trends in Properties of Elements is determined by:

Atomic Radius
Ionization Energy
Electronegativity
Valency
Metallic Characteristics of an Element
Non-metallic property of an Element
Reactivity of Element
Melting & Boiling Points of Element

Chapter Related Articles:

Ionization Enthalpy	Triads	Transuranium Elements
Electronic Configuration	Germanium	Anion
Moseley’s Law	Periodicity	Modern Periodic Table

Chemistry Related Articles:

NCERT Solutions for Class 11 Chemistry	Important Chemistry Formulas	Chemistry Study Material
Difference between Articles in Chemistry	Important Named Reactions	Chemistry Notes

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Hoffmann Bromamide degradation reaction is given by:
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Scurvy is caused due to deficiency of
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Calculate the standard Gibbs energy ($ \Delta G^\circ $) of the following reaction at 25°C: \[ \text{Au}(s) + \text{Ca}^{2+}(1M) \to \text{Au}^{3+}(1M) + \text{Ca}(s) \] \[ E^\circ_{\text{Au}^{3+}/\text{Au}} = +1.5 \, \text{V}, \quad E^\circ_{\text{Ca}^{2+}/\text{Ca}} = -2.87 \, \text{V} \] Predict whether the reaction will be spontaneous or not at 25°C. [1 F = 96500 C mol$^{-1}$]
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6.
Complete the following reactions by writing the structure of the main products:
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