NCERT Solutions For Class 12 Chemistry Chapter 7: The p-Block Elements

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NCERT Solutions for class 12 Chemistry Chapter 7 The p-Block Elements deals with the chemistry of the inorganic ring systems of elements present in p-block elements. Some of the Important topics under this chapter are:

  1. Group 13
  2. Group 14
  3. Group 15
  4. Group 16
  5. Boron family
  6. Group 18 
  7. Barium oxide
  8. Hydrogen Chloride
  9. Interhalogen Compounds
  10. Ammonium acetate
  11. Ammonium persulfate
  12. Chromate
  13. Dichromate

As this chapter has been omitted from the new CBSE Class 12 Chemistry syllabus, no questions can be expected from this chapter. It will be useful for other competitive exam preparation.

Download PDF: NCERT Solutions for Class 12 Chemistry Chapter 7 pdf


NCERT Solutions for Class 12 Chemistry Chapter 7

NCERT Solutions for class 12 Chemistry chapter 7 are as given below. 

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Class 12 Chapter 7 The p-Block Elements – Important Topics

The p-Block elements consists of compounds whose valence electrons enter any of the three p-orbitals.

  • Group 13 – Boron Family
  • Group 14 – Carbon Family
  • Group 15 – Nitrogen Family
  • Group 16 – Boron Family
  • Group 17 – Flourine Family
  • Group 18 – Noble Gas Family

Some of the important properties of p-Block elementsare as follows:

  • p-Block elements starts from 13th group to 18th group in the periodic table.
  • The general configuration of p block elements is ns2np1-6 except Helium.
  • The p-Block elements consists of metals, nonmetals and metalloids.
  • The oxidation state of p-block element is maximum when it is equal to its number of valence electrons.

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CBSE CLASS XII Related Questions

  • 1.
    Half-life (\( t_{1/2} \)) of a first order reaction is 1386 s. The value of rate constant is:

      • \(0.5 \times 10^{-4} \, \text{s}^{-1}\)
      • \(5.0 \times 10^{-4} \, \text{s}^{-1}\)
      • \(0.5 \times 10^{-5} \, \text{s}^{-1}\)
      • \(0.5 \times 10^{-3} \, \text{s}^{-1}\)

    • 2.
      How will you confirm the presence of five –OH groups in a glucose molecule, which are attached to different carbon atoms?


        • 3.
          Which of the following Grignard Reagent will be used to prepare cyclohexylmethanol when treated with methanal?

            • A
            • B
            • C
            • D

          • 4.
            Assertion (A): Highest oxidation state of Mn is +7 in most of the transition elements.
            Reason (R): Transition metals exhibit variable oxidation states.

              • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
              • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
              • Assertion (A) is true, but Reason (R) is false.
              • Assertion (A) is false, but Reason (R) is true.

            • 5.
              Write IUPAC names of the following coordination compounds:
              (i) \( [Ag(NH_3)_2][Ag(CN)_2] \)
              (ii) \( K_3[Fe(C_2O_4)_3] \)


                • 6.
                  For a reaction : \( N_2 + 3H_2 \rightarrow 2NH_3 \), the rate of reaction with respect to \( NH_3 \) is

                    • \( +\frac{1}{3} \frac{\Delta [NH_3]}{\Delta t} \)
                    • \( -\frac{1}{2} \frac{\Delta [NH_3]}{\Delta t} \)
                    • \( +\frac{1}{4} \frac{\Delta [NH_3]}{\Delta t} \)
                    • \( +\frac{1}{2} \frac{\Delta [NH_3]}{\Delta t} \)
                  CBSE CLASS XII Previous Year Papers

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