📝 Solved Practice Sheet & MCQ Test
1. What are the advantages of using CNG and LPG as fuels?
Answer
- These are clean fuels.
- These are low-cost fuels.
- These are available easily.
- These can be used directly for burning in homes and factories where it can be supplied through pipes.
2. Name the petroleum product used for surfacing roads.
Answer
3. Describe how coal is formed from dead vegetation. What is this process called?
Answer
The temperature also raised as they sank deeper and deeper. Due to high temperature and lack of oxygen, dead plants inside the earth got slowly converted to coal. As coal contains mainly carbon, the slow process of conversion of dead vegetation into coal is called carbonization.
4. Fill in the blanks:
(a) Fossil fuels are.…….,…………. and………..
(b) Process of separation of different constituents from petroleum is called………………
(c) Least polluting fuel for a vehicle is……………
Answer
(b) refining
(c) CNG.
5. Explain why fossil fuels are exhaustible natural resources.
Answer
6. Describe characteristics and uses of coke.
Answer
7. Explain the process of the formation of petroleum.
Answer
8. Synthetic Fibres and Plastics.
Answer
• A polymer is a very big molecule formed by the combination of a large number of small molecules.
•The word polymer comes from two Greek words poly meaning many and mer meaning units.
•The small molecules which join to form a polymer are called monomers.
9. Explain the process of the formation of petroleum.
Answer
10. Which of the following can be beaten into thin sheets?.
(b) Phosphorus
(c) Sulphur
(d) Oxygen
Answer >>
(A) Zinc
11. Which of the following statements is correct?.
(b) All non-metals are ductile.
(c) Generally, metals are ductile
(d) Some non-metals are ductile
Answer >>
(C) Generally, metals are ductile
12. Can you store the lemon pickle in an aluminium utensil? Explain.
Answer >>
Aluminium is a metal. Metals are more reactive to acids. That is why acidic foodstuffs like lemon pickles must not be stored in aluminium utensils
13. One day Reeta went to a jeweller’s shop with her mother. Her mother gave old gold jewellery to the goldsmith to polish. The next day when they brought the jewellery back, they found that there was a slight loss in its weight. Can you suggest a reason for the loss in weight.
Answer >>
In polishing, the jeweller put the gold jewellery in a mild acidic solution, which in reaction with acid goes into the solution. So, in this process, a certain amount of gold is lost to the acidic solution.
We hope the NCERT Solutions for Class 8 Science Chapter 4 Materials: Metals and Non-Metals help you. If you have any query regarding NCERT Solutions for Class 8 Science Chapter 4 Materials: Metals and Non-Metals, drop a comment below and we will get back to you at the earliest
12. Can you store the lemon pickle in an aluminium utensil? Explain.
Answer >>
Aluminium is a metal. Metals are more reactive to acids. That is why acidic foodstuffs like lemon pickles must not be stored in aluminium utensils
📖 Guide & Exam Strategy: Ncert Class 8 Science Chapter 5
Welcome to GKSchools comprehensive educational portal. This page is dedicated to Ncert Class 8 Science Chapter 5, a crucial segment under the CBSE Study Notes syllabus. Understanding Ncert Class 8 Science Chapter 5 is essential for students and aspirants aiming to secure high ranks in competitive examinations. In this detailed study guide, we break down the core principles, solve practice questions, and share expert preparation strategies to help you gain mastery over this topic.
Why is this topic important? Questions on Ncert Class 8 Science Chapter 5 are frequently asked in major exams like SSC CGL, UP Police Constable, Railway (RRB) NTPC, Bank PO, and State PSC Exams. Examiners test your logical understanding, speed, and accuracy in this segment. Scoring well here requires a combination of strong foundational concepts and regular practice. By studying the questions and solutions listed below, you can identify typical patterns and avoid common mistakes during the actual exam.
💡 Preparation Tips & Methods
Here are some valuable preparation tips for Ncert Class 8 Science Chapter 5:
- Clear Your Basics: Make sure you understand the foundational formulas or logical rules before jumping into mock tests.
- Daily Practice: Dedicate at least 20-30 minutes daily to solve different variations of Ncert Class 8 Science Chapter 5 questions.
- Analyze Explanations: Do not just look at the correct option. Read the detailed step-by-step solutions to understand the logic.
- Time Management: Practice with a timer to build the speed required to solve reasoning and math queries efficiently.
🚀 Benefits of Regular Practice
Key benefits of practicing this topic on GKSchools:
- 100% Free Practice Sets: Access premium mock tests and solved examples without any subscription.
- Updated Content: All practice sheets are revised regularly to match the latest exam pattern.
- Mobile Friendly: Interface is fully responsive, letting you study on the go.
In conclusion, mastering Ncert Class 8 Science Chapter 5 is a step-by-step journey that requires dedication. Use this study notes dashboard as your revision hub. Share this resource with your fellow aspirants, and bookmark the page for quick access before your exams. Let's begin the practice test below!
❓ Frequently Asked Questions (FAQs)
What is the best way to study Ncert Class 8 Science Chapter 5 for competitive exams?
The best way is to learn the basic concepts, review step-by-step solved questions on GKSchools, and then attempt daily mock tests to build speed.
How many questions from Ncert Class 8 Science Chapter 5 can we expect in the exam?
Typically, you can expect 3 to 5 questions from this topic in the Reasoning or Quantitative Aptitude section, depending on the specific exam.
Are the practice questions on GKSchools free?
Yes, all Q&A sets, study notes, and mock tests on GKSchools are 100% free for all students.
Does Ncert Class 8 Science Chapter 5 require memorizing complex formulas?
Most questions test your logical reasoning and analytical abilities rather than complex formulas. However, practicing diverse patterns helps you recognize solutions faster.
Can I download these study materials in PDF format?
Yes, you can use the 'Print' button on our page to save the complete solved questions list as a clean, printer-friendly PDF file.
