Class 8 - Science - Combustion and Flame - Study Points (#cbsenotes)(#eduvictors)

CBSE Class 08 Science 

Study Points

Chapter 6: Combustion and Flame

⑴ Combustion: The process of burning a substance in the presence of air (oxygen) and undergoes a chemical reaction to produce heat and light.

⑵ The substances which burn in the air are called combustible.

⑶ Oxygen (in air) is essential for combustion.

⑷ During the process of combustion, heat and light are given out.

⑸ Ignition temperature is the lowest temperature at which a combustible substance catches fire.

⑹ Types of combustion: The type of combustion differs depending on the type of fuel. Based on nature and intensity, combustions are classified into three types. They are:
        (i) Rapid combustion
        (ii) Spontaneous combustion
        (iii) Explosion

⑺ The calorific value of a fuel is expressed in kilojoules per kilogram (kJ/kg).

Class 9 - FIT - Chapter 02 - Computer System Organisation - Very Short Answer Type Questions (#cbsenotes)(#eduvictors)

Computer System Organisation

Very Short Answer Type Questions

Q1: Name the most commonly used input device.

Answer: Keyboard is the most commonly used input device, which can also be used to type commands directing the computer to perform certain actions.


Q2: Explain the main advantage and disadvantage of an OCR?

Answer: The main advantage of an OCR is the ability to scan the characters accurately. The disadvantage of an OCR is the limited number of characters offered by it.


Q3: Why do we use a webcam?

Answer: A webcam is basically used for capturing a series of digital images that are transferred by the computer to a server and then displayed to the hosting page.


Q4: Name the memory (Primary/Secondary)with the following features:

• If the current is interrupted, data is lost.
• Before a program is ready to run, the program is loaded into this memory, which allows the CPU to directly access the program.

CBSE Class 6 - 8 - English Grammar - Prepositions (Worksheet) (#englishgrammar)(#eduvictors)

English Grammar - Prepositions 

(Worksheet)

Directions: Fill in the blanks with suitable prepositions.

1- I didn’t go _____ school _____ Monday.

2- _____ Diwali people usually have big meals.

3- She’s graduating _____ June.

4- Don’t listen _____ him!

5- We ate pizza _____ lunch.

6- I’m traveling _____ April 7.

7- Mahesh is getting married ______ Sana.

CBSE Class 8 - Maths - Half Year Sample Question Paper - (2018-19) (#cbsepapers)(#eduvictors)

CBSE Class 8 - Maths
 - Half Year Sample
Question Paper - (2018-19)

CBSE Class 8 - Mathematics - Chapter 1 - Integers (Key Points) (#cbsenotes)(#eduvictors)

Mathematics - Chapter 1 - Integers
(Key Points)

⑴ Integers are a bigger collection of numbers which is formed by whole numbers and their negatives.

⑵You have studied in the earlier class,  about the representation of integers on the number line and their addition and subtraction.

⑶ We now study the properties satisfied by addition and subtraction.
(a) Integers are closed for addition and subtraction both. That is, a + b and a – b are again integers, where a and b are any integers.

(b) Addition is commutative for integers, i.e., a + b = b + a for all integers a and b.

(c) Addition is associative for integers, i.e., (a + b) + c = a + (b + c) for all integers a, b and c.

(d) Integer 0 is the identity under addition. That is, a + 0 = 0 + a = a  for every integer a.

⑷We studied, how integers could be multiplied and found that product of a  positive and a negative integer is a negative integer, whereas the product of two negative integers is a positive integer. For example, – 2 × 7 = – 14 and – 3 × – 8 = 24.

⑸ Product of even number of negative integers is positive, whereas the product of an odd number of negative integers is negative.

CBSE Class 8 - Maths - Term 1 Sample Question Paper - (2018-19) (#eduvictors)(#cbsepapers)

CBSE Class 8 - Maths
 - Term 1 Sample
Question Paper - (2018-19)

Class 11 - English - Hornbill The Portrait of Lady By Khushwant Singh - Chapter Summary and Q and A (#cbsenotes)(#eduvictors)

Class 11 - English - Hornbill

The Portrait of Lady

By Khushwant Singh

Chapter Summary

‘The Portrait of a Lady' is written in the first person and is in the biographical mode. In this story, the writer gives a detailed account of his Grandmother with whom he had a long association. Khushwant Singh recalls his Grandmother as short, fat and slightly bent. Her silver hair was scattered untidily on her wrinkled face. She hobbled around the house in white clothes with one hand resting on her waist and the other telling the beads of her rosary. Khushwant Singh remembers her as not very pretty but always beautiful. He compares her serene face to that of a winter landscape.

During their long stay in the village, Grandmother woke him up in the morning, plastered his wooden slate, prepared his breakfast, and escorted him to school. While he studied alphabets, she read the scriptures in the temple attached to the school. On their way back home she fed stale chapattis to stray dogs.