CBSE Class 10 - Science - Unit Test 2 Question Paper (2017-18) (#cbsePapers)

CBSE Class 10 - Science  - Unit Test 2 Question Paper (2017-18) 

Chapters covered are:

1. Biology - Control and Coordination
2. Chemistry - Acids, Bases and Salts
3. Physics - Magnetic Effects of Current

CBSE Class 10 - Science - MANAGEMENT OF NATURAL RESOURCES - Important Points That You Must Know (#cbseNotes)

MANAGEMENT OF NATURAL RESOURCES - Important Points That You Must Know

1. We can manage and conserve our natural resources as well as the environment through sustainable development.


2. Sustainable development means development which meets the needs of the present generation as well as of the future generation.


3. The objective of sustainable development is to maintain a healthy environment which is pollution free, so that human beings can live in harmony with nature.

4. To achieve sustainable development, the goal should be to minimise resource use.

Class 11 - Biology - Plant Tissues - Epidermal Tissue System in Plants - Important Points (#cbseNotes)

Epidermal Tissue System in Plants

Leaf Structure and Epidermis
(image credits: wikimedia)

1. The outer covering of the plant body is formed of epidermal tissue system.


2. The epidermal tissue system is composed of
ⅰ epidermal cells,
ⅱ stomata and
ⅲ edidermal appendages (trichomes and hairs).


3. Epidermis: The outermost layer of the primary plant body is called epidermis.


4. The epidermis is made up of elongated, compactly arranged cells. These cells form a continuous layer. There is usually a single layer of cells in the epidermis.


5. The epidermal cells are parenchymatous. In these cells, a small amount of cytoplasm lines the cell wall and a large vacuole is present.

Parenting Tip - Attitude (#parenting)

Parenting Tip - Attitude

CBSE Class 12 - Chemistry - Solutions -Very Short Questions and Answers (#cbseNotes)

Solutions -Very Short Questions and Answers

Q1: What is Van’t Hoff factor ?

Answer: It is the ratio of normal molecular mass to observed molecular mass. It is denoted
as i.
i = normal molecular mass/observed molecular mass
 = no. of particles after association or dissociation/no. of particles before


Q2: What is the Van’t Hoff factor in K₄[Fe(CN)₆] and BaCl₂ ?

Answer: 5 and 3


Q3: Why the molecular mass becomes abnormal ?

Answer: It is due to association or dissociation of solute in given solvent.


Q4: Define molarity. How it is related with normality ?

Answer: N = M ✕ Basicity or acidity

Class 9 - Biology - Tissues - 15 Amazing Facts About Blood That You Should Know (#cbseNotes)

15 Amazing Facts About Blood
That You Should Know

① Human heart pumps the blood 36 thousand liters of blood in the distance of 20 thousand kilometers in a day.

② Blood is a fluid connective tissue.

③ Human blood is red in colour due to the presence of red pigment i.e. haemoglobin.

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④ The blood is always not red in all animals. The cockroach has white blood where as there is blue coloured blood in a snail.

CBSE Class 12 - Computer Science - C++ Practical Binary File Processing Snippet-10 Copy Records (#cbseNotes)

C++ Practical
Binary File Processing Snippet-10
Copy Records 

Question: Given a binary file TELEPHON.DAT, containing records of the following class Directory

class Directory
  {
    char name[20];
    char address[30];
    char areacode[5];
    char phonenum[15];
    public:
      void register();
      void show();
      int checkcode(char AC[])
      { return strcmp(areadcpde, AC); }
   };

 Write a function COPYABC() in C++ that would copy all the records have areacode as "123" from TELEPHON.DAT to TELEBACK.DAT

Answer: