CBSE Class 9 - English - Moments - Chapter - The Snake and The Mirror (Chapter Summary and Questions and Answers)(#cbsenotes)(#eduvictors)

The Snake and The Mirror

Chapter Summary and Q & A

Author: Vaikom Muhammad Basheer

Summary:

1. A lonely unmarried Homeopathy specialist lived in a non-zapped leased life with his few visiting rodents and cats.

2. On a hot summer night, the doctor came back to his room after dinner and heard a noise, when he opened the door. Noise, being a familiar one, he did not pay any attention to it and lay down on his bed but could not sleep.

3. He took out a book, opened it on the table. He looked into the large mirror kept on the table and admired himself as a young, handsome, unmarried doctor.

CBSE Class 12 - Physics - Chapter 11 - Dual Nature Of Radiation and Matter - Very Short Questions Answers (#cbsenotes)(#eduvictors)

Class 12 Physics

Dual Nature Of Radiation and Matter  

Very Short Questions Answers

Q1: Write the relationship of de-Broglie wavelength λ associated with a particle of mass m in terms of its kinetic energy K.

Answer: Kinetic Energy (K) = p²/2m
    where p = momentum and m = mass.
    ∴ p = √2mK

    ∴ de-Broglie wavelength λ = h/p = h/ √2mK


Q2: Mention one physical process for the release of an electron from the surface of a metal?

Answer: Photoelectric emission.


Q3: Name an experiment which shows the wave nature of the electron. Which phenomenon was observed in this experiment using an electron beam?

Answer: Davisson-German experiment shows the wave nature of the electron. Phenomena of constructive interference were observed in the Davisson-Germer experiment.


Q4: What is Thermionic emission?

Answer: It is the phenomenon of emission of electrons from the metal surface when heated suitably.

Geography - The Composition of the Earth's Crust (#eduvictors)(#cbsenotes)

Geography

The Composition of the Earth's Crust

Class 10 - Chemistry - Carbon and Its Compounds - Study Notes - Download PDF (#cbsenotes)(#eduvictors)

CBSE Class 10 - Chemistry 
 Carbon and Its Compounds - Study Notes (PDF)

Chemistry is that branch of science which deals with the composition, structure and properties of matter. Organic chemistry is predominantly concerned with the reactions that organic molecules undergo. Hydrocarbons are compounds that contain only carbon and hydrogen atoms. Carboxylic acids contain both a carbonyl group (C=O) and a hydroxyl group (–OH) on a terminal carbon. Carboxylic acids, like aldehydes, are terminal functional groups.

Here follows the class 10 Chemistry - Carbon and Its Compounds notes available as pdf file.

CLASS 10 : SOCIAL SCIENCE - CHAPTER : THE AGE OF INDUSTRIALISATION (Q and A) (#cbsenotes)(#eduvictors)

THE AGE OF INDUSTRIALISATION 

(Questions and Answers)

Q1: Explain what is meant by proto-industrialisation?

Answer:

1. Proto-industrialisation refers to that phase of industrialization which existed in Britain before the growth of factories using mechanical power.

2. Industries during this phase were run with the help of human labour.

3. The proto-industrialisation system was controlled by the merchants.

4. Goods were produced by a vast number of producers working within their family farms and not in the factories.


Q2: In the proto-industrialisation period, why was it difficult for new merchants to set up business in towns?
OR
Why did the merchants move to the countryside to set up their business?


Answer: It was difficult for merchants to set up their business in towns because:

1. Urban crafts and trade guild associations were powerful in the towns. They restricted the entry of new people into the trade.

2. Rulers granted different guilds the monopoly rights to produce and trade in specific products.

So the new merchants turned to the countryside.

CBSE Class 11 - Physics Sample Question Paper - (2018-19) (#cbsenotes)(#eduvictors)

CBSE Class 11 - Physics
 Sample Question Paper - (2018-19)

Physics is a study of basic laws of nature and their manifestation in different natural phenomena. Physics is the study of physical world and matter and its motion through space and time, along with related concepts such as energy and force. The class 11 syllabus provides logical sequencing of the ‘Units’ of the subject matter with proper placement of concepts with their linkages for better understanding.

Here follows the class 11 Half Year Physics sample question paper to assess your knowledge.

CBSE Class 6 - Chapter-wise Science Quiz (#cbsenotes)(#eduvictors)

Class 6 - Science Quiz

Science plays a crucial role in setting the progressive path of our society. It is one way of knowing about the world. Science is a seamless web of knowledge. It is the search for truth and knowledge. Scientists suggest explanations of why things are as they are, and then they test those explanations, using experiments.

Plants make their own food from the Sun’s rays. Everything in the living world needs food to survive. Magnets exert a force called magnetism, which can attract certain objects – especially those containing iron. The main objective of teaching science at class 6 level is to build a scientific temperament. 

CBSE Class 11 - Accountancy - Theory Base of Accounting - Introduction to Book Keeping (#cbsenotes)(#eduvictors)

Introduction to Book‐Keeping

(Chapter 2: Theory Base of Accounting)

Accounting can be defined as an information system that provides reports to users about the economic activities and condition of a business.   In earlier times, the Barter system was followed.  Goods were exchanged for goods.    Gradually,  the need was felt to have a common medium of exchange for goods and services and thus, the evolution of money took place.   All the activities performed involved money.  Business activities came into existence.  It was very difficult for businessmen to remember each and every transaction of the business and therefore, recording all the transactions became necessary. As a result, accounting systems are designed to show the increases and decreases in each accounting equation element as a separate record. This record is called an account. This process of recording all the transactions in a systematic manner is known as Book‐Keeping.

What is Book-Keeping?

Book‐Keeping is a systematic manner of recording transactions related to business in the books of accounts. In Book‐Keeping, transactions are recorded in the order of the dates. An Accountant is a person who records the transactions in the books of the business and is expected to show the financial results of a business for every financial year. A financial year in India is followed from 1st  April to 31st  March.

According to J. R. Batliboi

"Book‐Keeping is an art of recording business dealings in a set of books." 

According to R.N  Carter:

"Book‐Keeping  is  an  art  of  recording  in  the  books  of  accounts,  all  those  business  transactions  that  result in transfer of money’s worth" 

History Quiz for Competitive Examinations (#eduvictors)(#cbsenotes)

History Quiz for Competitive Examinations

History is an inescapable part of our lives. The present society has been shaped up by the actions of our ancestors.  Behind every great war or revolution, and every charismatic leader or head of state, is a political motivation and ideology. Epochal moments in history have shaped our world.

To assess your knowledge for various competition and entrance examinations, MCQs based quizzes are listed below for various topics. The MCQs are based on NCERT history books from class 6-12.

1. Ancient India (From Ancient Harappa Civilizations to Vedic Times) Quiz 1, Quiz-2 

2. Ancient India: Religion In Vedic Period: See Quiz

3. Ancient India: Magadh Kingdom (See Quiz)

CBSE Class 12 - Chemistry - Chapter 15: Polymers - Very Short Question Answers (#cbsenotes)(#eduvictors)

Chapter 15: Polymers :Very Short Question Answers 

Q1: Define polymer.

Answer: A polymer may be defined as a high molecular weight compound formed by the combination of a large number of one or more types of small molecular weight compounds.

Q2: Based on the source, how polymers are classified?

Answer:
① Natural: Found in plants and animals, e.g. Proteins, cellulose, natural rubber, silk, wool.
② Synthetic: Man-made e.g. Nylon, polyester, neoprene, Bakelite, Teflon, PVC, polystyrene.


Q3: Based on structures, what are the three categories of polymers.

Answer:
① Linear Polymers
② Branched Polymers


Q4: Name a natural elastomer. 

Answer: Natural rubber.


Q5: Write the name of a synthetic polymer which is an ester. 

Answer: Nylon 6 or Nylon 6,6.