Q:
Fill the name of the correct mineral in the crossword below: ACROSS 1. A ferrous mineral (9) 2. Raw material for cement industry (9) 3. Finest iron ore with magnetic properties (9) 4. Highest quality hard coal (10) 5. Aluminium is obtained from this ore (7) 6. Khetri mines are famous for this mineral (6) 7. Formed due to evaporation (6) DOWN 1. Found in placer deposit (4) 2. Iron ore mined in Bailadila (8) 3. Indispensable for electrical industry (4) 4. Geological Age of coal found in north east India (8) 5. Formed in veins and lodes (3)
A:
ACROSS
- A ferrous mineral (9) (MANGANESE)
- Raw material for cement industry (9) (LIMESTONE)
- Finest iron ore with magnetic properties (9) (MAGNETITE)
- Highest quality hard coal (10) (ANTHRACITE)
- Aluminium is obtained from this ore (7) (BAUXITE)
- Khetri mines are famous for this mineral (6) (COPPER)
- Formed due to evaporation (6) (GYPSUM)
DOWN
- Found in placer deposit (4) (GOLD)
- Iron ore mined in Bailadila (8) (HEMATITE)
- Indispensable for electrical industry (4) (MICA)
- Geological Age of coal found in north east India (8) (TERTIARY)
- Formed in veins and lodes (3) (TIN)
Q:
Answer the following questions in about 120 words.
(i) Describe the distribution of coal in India.
(ii) Why do you think that solar energy has a bright future in India?
A:
(i) The major resources of metallurgical coal belong to the Gondwana age and are located mainly in the Damodar valley in the states of West Bengal and Jharkhand. Raniganj, Jharia, Bokaro are some of the important coalfields. The Godavari, the Mahanadi, the Son and the Wardha valleys also contain coal deposits. Tertiary coals occur in the northeastern states like Meghalaya, Assam, Arunachal Pradesh, and Nagaland. Lignite is a low-grade brown coal, which is soft with high moisture content. The principal lignite reserves are in Neyveli in Tamil Nadu and are used for generation of electricity.
(ii) Solar energy has a bright future in India because –
- India being a tropical country receives sunlight in abundance throughout the year, so there are enormous possibilities of tapping solar energy.
- It can be easily established in rural and remote areas.
- Solar energy can be used for cooking food, pumping water, refrigerators, and street lighting. Therefore, its demand will increase in future.
- It will minimise the dependence of rural households on firewood and dunk cakes, which in turn will contribute to environmental conservation and adequate supply of manure in agriculture.
Q:
Answer the following questions in about 30 words.
(i) Distinguish between the following in not more than 30 words.
(a) ferrous and non-ferrous minerals
(b) conventional and non-conventional sources of energy
(ii) What is a mineral?
(iii) How are minerals formed in igneous and metamorphic rocks?
(iv) Why do we need to conserve mineral resources ?
A:
(i) (a)
|
Ferrous minerals |
Non-ferrous minerals |
|
Metallic minerals, which contain iron, are called ferrous minerals. |
Metallic minerals, which do not contain iron, are called non-ferrous minerals. |
|
Examples - Iron ore, manganese, nickel, cobalt, etc. |
Examples- Copper, bauxite, tin, etc. |
(b)
|
Conventional Sources of Energy |
Non-conventional Sources of Energy |
|
The sources of energy, which have been in use for a long time |
The resources, which are yet in the process of development over the past few years |
|
They cause pollution when used as they emit smoke and ash. |
Generally, these are pollution-free. |
|
For example: coal, natural gas, water, fire-wood |
For Example: geothermal energy, solar energy, wind energy, tidal energy, biogas energy, nuclear energy. |
ii) A mineral is a homogeneous, naturally occurring substance with a definable interior structure.
(iii) In igneous and metamorphic rocks, minerals may occur in the cracks, crevices, faults, or joints. In most cases, they are formed when minerals in liquid/molten and gaseous forms are forced upward through cavities towards the earth’s surface.
(iv)We need to conserve the mineral resources due to the following:
- It takes millions of years for the formation of minerals.
- Continued extraction of ores leads to increasing costs as mineral extraction comes from greater depths along with decrease in quality.
- Compared to the present rate of consumption, the replenishment rate of minerals is very slow.
- Mineral resources are finite and non-renewable.
Q:
Multiple choice questions.
(i) Which one of the following minerals is formed by decomposition of rocks,leaving a residual mass of weathered material?
(a) coal (b) bauxite (c) gold (d) zinc
(ii) Koderma, in Jharkhand is the leading producer of which one of the following minerals?
(a) bauxite (b) mica (c) iron ore (d) copper
(iii) Minerals are deposited and accumulated in the stratas of which of the following rocks?
(a) sedimentary rocks (c) igneous rocks
(b) metamorphic rocks (d) none of the above
(iv) Which one of the following minerals is contained in the Monazite sand?
(a) oil (b) uranium (c) thorium (d) coal
A:
(i) (b) bauxite
(ii) (b) mica
(iii) (a) sedimentary rocks
(iv) (c) thorium
Benefits of NCERT Solutions
1. It helps students practice loads of questions from every chapter which encourages them to make their concepts more grounded..
2. NCERT Solutions for Class 10 encourages you to upgrade your knowledge and clear your concepts with the goal that you can score well in your exams.
3. These solutions are the best examination materials to know your weak and strong points. It is essential to work on your weak points to score well in the exams.
4. Most of the questions in exams are asked in a similar arrangement from NCERT textbooks. Hence, students should altogether revise every chapter’s solution to get a good command in subjects
Tips & Strategies for Class 10 Exam Preparation
2. Refer to NCERT Solutions given on the Extramarks website to clear your concepts anytime while preparing for your exams.
3. Start studying with the help of Extramarks – The Learning App to pass your exams with flying colours. It provides complete study material with solved and unsolved papers.
4. It is important to clear all your doubts before the exam with your teachers or Alex (an AI studybot).
5. While reading or learning a chapter, make sure to make notes with algorithms, formulas, theorems, etc., and study them for a quick revision before exams.
6. Practice an ample number of question papers to make your concepts stronger.
7. Take rest and a proper meal. Don’t stress too much.
Why opt for Extramarks NCERT Solutions for Class 10 ?
NCERT 10 solutions for math are in-depth solutions written in very basic and simple language which makes them easy to understand. It gives sufficient study material to practice with to the students which the latter can use for practicing for board exams. Extramarks website has NCERT solutions for all classes that can be used by students of different classes. These solutions can be accessed by visiting the footer section of the website. Prepare notes and learn from NCERT solutions, go through them thoroughly before the exam, and practice with the questions that crop up in NCERT solutions.
Yes, Extramarks website has NCERT solutions for class 10 along with all other classes of CBSE listed on the footer section. These solutions have been prepared by top faculty members who have years of experience and expertise in teaching CBSE students.
Extramarks class 10 NCERT solutions are crucial for board preparation for students. These solutions are given in a simple language which makes it easy to understand for all and it proves to be the basis for board examination which further helps the students in understanding the extensive study material. Class 10 NCERT solutions focus on fundamental clarity of the concepts which further helping in clearing all doubts and helping students achieve concept clarity. NCERT solutions provide enough practice and study material to students that they can use to test their knowledge
Yes, class 10 solutions (NCERT) are sufficient to prepare for class 10 board exams. NCERT solutions are simple and easy to understand written in a way that is appealing to students. NCERT solutions form the basis of examination of class 10 board so they prove to be a sufficient solution which also gives enough study material to practice with to students. Different types of NCERT solutions help students prepare for the exam through varied formats and provide them concept clarity.
Class 10 CBSE NCERT solutions are sufficient to prepare for board exams but if you want to test your knowledge and would like to browse more solutions then you can use textbook solutions to prepare for the exam. Although the NCERT solutions are enough for preparing for the exam, you can check out the solved and unsolved sample papers along with textbook solutions from Extramarks - The Learning App and website
India’s leading learning platform
Get
in touch
Have a query about our services?
Get in touch with us and we will
guide you through a new world of
redefined learning
Already member? LogIn