Table of Contents
Welcome to the NCERT Exemplar for Class 12 Chemistry Chapter 7 The P Block Elements. This content is designed to help you prepare for your exams. Our subject specialists have created thorough solutions for you to refer to. All the questions from the textbook’s exercises are answered here.
These NCERT Exemplar solutions are written in simple, student-friendly language while still following the rules for solving NCERT Exemplar for Class 12 Chemistry Chapter 7. Practicing these answers can be very helpful not only for your exams but also for doing well in future competitive exams.
We have carefully considered the approaches to answering the important questions for class 12 chemistry chapter 7 to ensure they are accurate and on target. Time management is crucial in exams, so it’s essential to answer questions efficiently to get the best results.
Also Check – NCERT Solutions for Class 12 Chemistry
NCERT Exemplar Class 12 Chemistry Chapter 7 The P Block Elements PDF
Explore the p-block elements with our helpful NCERT Exemplar for Class 12 Chemistry Chapter 7. This PDF has detailed answers to help you understand the key ideas. Use it to improve your knowledge and do well in your exams. It’s your go-to guide for the p-block elements section.
The chemistry of inorganic ring systems of the p-block elements, which is covered in the NCERT Exemplar for Class 12 Chemistry Chapter 7, has a long and illustrious history that stretches back to the early nineteenth century. P block elements are those from Groups 13, 14, 15, 16, 17, and 18. The general outer electrical configuration ns2np1-6 is used to represent them. Metals, non-metals, and metalloids are all possible physical states for P block elements. To learn more about this chapter, consult NCERT Exemplar.
Must See! – CBSE Class 12 Chemistry Syllabus
General Trends in the Properties of the p-Block Elements
- Atomic and ionic radii
- Ionization enthalpy
- Electronegativity
- Oxidation states
Group-wise Study of p-Block Elements
- Group 13 (Boron family)
- Group 14 (Carbon family)
- Group 15 (Nitrogen family)
- Group 16 (Oxygen family)
- Group 17 (Halogen family)
- Group 18 (Noble gases)
Class 12 Chemistry NCERT Exemplar for Chapter 7 The p Block Elements
The term – I CBSE Syllabus for the semester 2024-25 includes Chapter 7 p-Block Elements of Class 12 Chemistry. For a better understanding and explanation of the ideas, the NCERT Exemplar for Class 12 are provided here. When it comes to learning and understanding complicated concepts/problems, it is the best reference material available.
Important Questions for Class 12 Chemistry Chapter 7
Are you getting ready for your Class 12 Chemistry exams? Make sure you practice these important Questions for Class 12 Chemistry Chapter 7. Our experts have chosen the most important questions from class 12 chemistry chapter 7 to help you focus your studying. Practicing these questions will help you really understand the main ideas in this chapter and do well on your exams.
General Trends in the Properties of the p-Block Elements
Ques: What is the trend in the atomic radii of the p-block elements?
Ans: The atomic radii of the p-block elements decrease from left to right in a period.
Solution: The atomic radii of the p-block elements decrease from left to right in a period because the number of protons in the nucleus increases, which leads to a greater attraction between the protons and the electrons, causing the electrons to be pulled closer to the nucleus.
Ques: What is the trend in the ionization enthalpy of the p-block elements?
Ans: The ionization enthalpy of the p-block elements increases from left to right in a period.
Solution: The ionization enthalpy of the p-block elements increases from left to right in a period because the number of protons in the nucleus increases, which leads to a greater attraction between the protons and the electrons, making it more difficult to remove an electron.
Ques: What is the trend in the electronegativity of the p-block elements?
Ans: The electronegativity of the p-block elements increases from left to right in a period.
Solution: The electronegativity of the p-block elements increases from left to right in a period because the number of protons in the nucleus increases, which leads to a greater attraction between the protons and the electrons, making the atom more likely to attract electrons.
Group-wise Study of p-Block Elements
Ques: What is the oxidation state of boron in its compounds?
Ans: The oxidation state of boron in its compounds is +3.
Solution: Boron typically exhibits an oxidation state of +3 in its compounds because it has three valence electrons and tends to lose three electrons to form a stable ion.
Ques: What is the oxidation state of carbon in its compounds?
Ans: The oxidation state of carbon in its compounds is -4.
Solution: Carbon typically exhibits an oxidation state of -4 in its compounds because it has four valence electrons and tends to gain four electrons to form a stable ion.
Ques: What is the oxidation state of nitrogen in its compounds?
Ans: The oxidation state of nitrogen in its compounds is -3.
Solution: Nitrogen typically exhibits an oxidation state of -3 in its compounds because it has five valence electrons and tends to gain three electrons to form a stable ion.
Also Check: p-Block Elements Class 12 Notes Chemistry Chapter 7
Ques: What is the oxidation state of oxygen in its compounds?
Ans: The oxidation state of oxygen in its compounds is -2.
Solution: Oxygen typically exhibits an oxidation state of -2 in its compounds because it has six valence electrons and tends to gain two electrons to form a stable ion.
Ques: What is the oxidation state of fluorine in its compounds?
Ans: The oxidation state of fluorine in its compounds is -1.
Solution: Fluorine typically exhibits an oxidation state of -1 in its compounds because it has seven valence electrons and tends to gain one electron to form a stable ion.
Ques: What is the oxidation state of chlorine in its compounds?
Ans: The oxidation state of chlorine in its compounds is -1.
Solution: Chlorine typically exhibits an oxidation state of -1 in its compounds because it has seven valence electrons and tends to gain one electron to form a stable ion.
Ques: What is the oxidation state of iodine in its compounds?
Ans: The oxidation state of iodine in its compounds is -1.
Solution: Iodine typically exhibits an oxidation state of -1 in its compounds because it has seven valence electrons and tends to gain one electron to form a stable ion.
Group 13 (Boron Family)
Ques: What is the electronic configuration of boron?
Ans: The electronic configuration of boron is 1s² 2s² 2p¹.
Solution: The electronic configuration of boron is 1s² 2s² 2p¹ because it has three valence electrons and tends to lose three electrons to form a stable ion.
Ques: What is the electronic configuration of aluminum?
Ans: The electronic configuration of aluminum is 1s² 2s² 2p⁶ 3s² 3p¹.
Solution: The electronic configuration of aluminum is 1s² 2s² 2p⁶ 3s² 3p¹ because it has three valence electrons and tends to lose three electrons to form a stable ion.
Group 14 (Carbon Family)
Ques: What is the electronic configuration of carbon?
Ans: The electronic configuration of carbon is 1s² 2s² 2p².
Solution: The electronic configuration of carbon is 1s² 2s² 2p² because it has four valence electrons and tends to gain four electrons to form a stable ion.
Ques: What is the electronic configuration of silicon?
Ans: The electronic configuration of silicon is 1s² 2s² 2p⁶ 3s² 3p².
Solution: The electronic configuration of silicon is 1s² 2s² 2p⁶ 3s² 3p² because it has four valence electrons and tends to gain four electrons to form a stable ion.
Group 15 (Nitrogen Family)
Ques: What is the electronic configuration of nitrogen?
Ans: The electronic configuration of nitrogen is 1s² 2s² 2p³.
Solution: The electronic configuration of nitrogen is 1s² 2s² 2p³ because it has five valence electrons and tends to gain three electrons to form a stable ion.These Quess and Anss cover the key concepts from Chapter 7 of Class 12 Chemistry, focusing on the p-block elements.
Topics Covered in Class 12 Chemistry Chapter 7 – The P Block Elements
In this chapter, you’ll learn about the following topics:
Group 15 Elements
- Dinitrogen
- Ammonia
- Oxides of Nitrogen
- Nitric Acid
- Phosphorus — Different Forms
- Phosphine
- Phosphorus Halides
- Oxoacids of Phosphorus
Group 16 Elements
- Dioxygen
- Simple Oxides
- Ozone
- Sulphur — Different Forms
- Sulphur Dioxide
- Oxoacids of Sulphur
- Sulphuric Acid
Group 17 Elements
- Chlorine
- Hydrogen Chloride
- Oxoacids of Halogens
- Interhalogen Compounds
Group 18 Elements
Did you know that nitrogen makes up 78% of the air we breathe? Oxygen, the most common element in the Earth’s crust, makes up 46.6% of its mass. Fluorides are insoluble, while seawater contains potassium, calcium, magnesium, and sodium bromides, chlorides, and iodides, mostly as a sodium chloride solution.
Key Highlights of this NCERT Exemplar
- Comprehensive coverage of all topics in Chapter 7: The P Block Elements
- Detailed explanations and step-by-step solutions for every question
- Focus on building conceptual understanding and problem-solving skills
- Useful for both exam preparation and competitive exam readiness
- Designed to help you score high marks in your Class 12 Chemistry exams
Why Choose the NCERT Exemplar?
The NCERT Exemplar is highly respected by students for its quality of learning. We have some of the best teachers in the country, who use videos, animations, and study tools to make the lessons engaging.
Class 12 Chemistry Chapter 7 FAQs
What topics are covered in Chapter 7 of the NCERT Exemplar for Class 12 Chemistry?
Chapter 7 covers the p-block elements, including general trends in their properties and a group-wise study. Topics include atomic and ionic radii, ionization enthalpy, electronegativity, and oxidation states.
How do the NCERT Exemplar solutions help in exam preparation?
The NCERT Exemplar solutions provide detailed explanations and step-by-step workings for all the questions. By practicing these solutions, you can strengthen your conceptual understanding and problem-solving skills, which are crucial for performing well in exams.
Are the NCERT Exemplar solutions useful only for exams?
No, the NCERT Exemplar solutions are not only useful for exams but also for competitive exams and a deeper understanding of the subject. The solutions focus on building a strong foundation in the concepts, which can be applied in various contexts.
How do the NCERT Exemplar solutions differ from the textbook solutions?
The NCERT Exemplar solutions are more detailed and comprehensive compared to the textbook solutions. They provide additional explanations, alternative approaches, and important points to remember, making them a valuable resource for exam preparation.
Can I find the NCERT Exemplar solutions online?
Yes, the NCERT Exemplar solutions for Class 12 Chemistry Chapter 7 are available online on various educational websites and platforms. However, it is essential to refer to reliable sources to ensure the accuracy and quality of the solutions.
