CBSE Board Exam 2018: 10th, 12th Practical Examinations in January, Theory Exams timetable awaited

Posted: 10-Dec-17

CBSE 2018 Class 10 and Class 12 Practical Board Examinations (Time Table) is out - CBSE News image
The time table for class 10 and class 12 practical board exams has been released by the Central Board of Secondary Education (CBSE). CBSE date sheet for class 10, 12 board exam theoretical papers is expected to be released in January 2018.

According to media reports, CBSE is understood to have issued a circular on December 8, 2017 which has been dispatched to all CBSE affiliated schools to conduct class 12 and class 10 practical examinations 2018 from January 16, 2018 as well as upload the practical marks on the website by February 25, 2018.

Depending on the nature of the subject, CBSE board examination comprises of internal or practical exam and external or theory exam for assessing the performance of class 10 and 12 students. In practical examinations along with experiments a student has to face viva voce from internal or external examiner.

As per CBSE norms for senior school certificate exam, in theory subjects candidates have to obtain 33 per cent marks in order to qualify; however for those subjects which have theory and practical examinations, candidates have to obtain 33 per cent marks in both the exams to qualify.
As per the report, CBSE date sheet for 2018 (timetable / exam schedule) is expected to be released by the end week of December or in the first week of January, 2018.
Schooling education in India is mainly regulated by School Boards at national level or Central Board of Secondary Education (CBSE) as well as at state level too. The Central Board of Secondary Education or CBSE established on November 3, 1962 is the central body of Government of India to conduct the secondary and senior-secondary school examinations in India. At present there are more than 9000 schools affiliated to CBSE spread in 19 countries all over the world with approximately 12.5 million students studying in those schools. All Sainik Schools, Kendriya Vidyalaya Sangathan (KV), Tibetan Schools, Railway Schools, the Navodaya Vidyalayas along with many private schools are affiliated to CBSE.

CBSE also prepare syllabus for the schools affiliated to it. The exam it conducts for class 10 is called All India Secondary School Examination (AISSE) and the one for class 12 is called All India Senior School Certificate Examination (AISSCE).

For details and update about CBSE date sheet (exam time table, exam schedule), CBSE circulars candidates may visit CBSE official website  

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Ruling The Countryside - CBSE guess questions for Chapter 3, 8th NCERT History

Class 8 NCERT History - Ruling the CountrysideCBSE Guess questions with answers

CBSE Guess Questions with their Answers (Short)

Question.1: When and who appointed the Company as Diwan of Bengal?

Answer: On 12th August, 1765, the Mughal emperor appointed the East India Company as the Diwan of Bengal.

CBSE Guess Questions with their Answers (Long)

Question.2: Write short notes on:
i. Permanent Settlement.
ii. Mahalwari System.
iii. The Munro System (Ryotwari System).

        (i)        Permanent Settlement: The Bengal economy fell sharply was facing a deep crisis after the company was given the rights of Diwan. The company officials realized that it was due to their lack of planning which led to the downfall in Indian economy and their revenue collection.  The zamindars were not investing for the improvement of land. In order to encourage investment in land and improve agriculture the company introduced the Permanent Settlement in 1793.It was devised by Lord Cornwallis. According to this system The Rajas and Taluqdars were recognized as Zamindars. They were agreed to collect rent from the peasants and pay revenue to the Company. The amount to be paid (revenue) was fixed permanently that it was not to be increased ever in future. The condition was that the Zamindars had to pay this revenue rigidly on due date even if the crop had failed for some reason as otherwise the land was auctioned. It was felt that this would ensure a regular flow of revenue into the Company’s coffers and at the same time encourage the Zamindars to invest for improving the land because the zamindar would benefit if he could increase production from the land by his own efforts. On the contrary the Company officials ultimately discovered that the zamindars were not interested in investment for improvement of the land. It was also discovered that the revenue which had been fixed was so high that the zamindars found it difficult to pay. The peasants were in distress as they found the system extremely oppressive. So ultimately the ‘Permanent Settlement’ system was not successful as expected. 

      (ii)        Mahalwari System: As the Permanent Settlement system became unsuccessful so, the Company introduced another system popularly known as Mahalwari System. This system was devised by Holt Mackenzie which came into effect in 1822 in the North West provinces of Bengal Presidency. The revenue was not fixed and the Government could increase the same whenever it was in need of money to meet its expenses of administration. The estimated revenue of each plot within a village was added up to calculate the revenue that each mahal (village) had to pay. The charge of collecting the revenue and paying it to the Company was given to the village headman. Thus the ‘village’ and the ‘village headman’ would benefit since there was no middleman between the British and the village headman. The village headmen had a scope to negotiate with the Company if they were unable to pay the revenue fro some reason and also continued to cultivate the land.

     (iii)        The Munro System (Ryotwari System): In the British territories of the south a similar system existed as the Permanent Settlement. The new system was known as the ‘ryotwari system’. Captain Alexander Read tried this on small scale in some of the areas annexed after the wars with Tipu Sultan. Since this system was developed by Thomas Munro so, it is also known as Munro System. It was gradually extended all over South India. Read and Munro found that there were no traditional zamindars. This settlement had to be made directly with the cultivators (ryots) who had tilled the land for generations. The fields of cultivators had to be carefully and separately surveyed before the assessment of revenue. Munro had the idea that the British should not act as paternal father figures who would protect the ryots under their charge. But within a few years it was felt that all not well as nothing happened as it was expected. The revenue officials fixed too high a revenue demand. Ryots were not able to pay the revenue. As a result they fled to the countryside and villages became deserted. Although it was expected that the new system would transform the peasants into rich farmers, but it failed to happen.   

 Further Study (NCERT Solutions)

Class 9 Science, CBSE Sample Paper with Marking Scheme, Solutions

CBSE Sample Question Paper | 9th CBSE Practice Paper
Class IX Mock Test Paper with Marking Scheme, Solutions (SA II)        
M.M.-80                                                                                Time-3-31/2 hrs.
General Instructions:
1. Questions 1 to 5 are one mark questions. They are to be answered in one word or one sentence.
2. Questions 6 to14 are two marks questions. They are to be answered in about 30 words.
3. Questions 15 to 23 are three marks questions. They are to be answered in about 50 words. 
4. Questions 24 to 26 are five marks questions. They are to be answered in about 70 words.
5. Question 27 to41are multiple choice questions based on practical skills. Each question is a one mark question. You are to choose one most appropriate response out of the four a, b,c and d provided to you.

1 Which animal tissue is commonly known as packaging tissue?     1                                        
2. Calculate the formula unit mass of CaCO3 (given at masses: Ca = 40. 0µ, c=12 0µ, 0 = 16.0µ1
3. An ion M 3+ has 10 electrons and 14 neutons
   What is the atomic number and mass number of M ?     1
4. State the wave property that determines ‘pitch’ of sound.     1
5. How does the speed of sound change on increasing the temperature?      1
6. What do you mean by photoperiod? Name two processes that are dependent on photoperiod.    2
7. What will happen if:
    i) The skin epithelium is not stratified.
    ii) Stratified squamous epithelium lines blood vessels.      2
8. Name the target organ/organ system of AIDS virus. What is the cause of death in case of          
    people suffering from AIDS?      2                                                                                             
9. What is meant by (i) a solute and (ii) a solvent in a solution? Identify the solute and the solvent in a homogenous mixture of iodine and alcohol.      2
10. A housewife churned full cream milk with a milk churner.
     (i) What did she observe after churning milk?
     (ii) What could be the possible reason for this observation?             2
11. The average atomic mass of a sample of an element ‘X’ is 16.2µ. What is the percentage of
      each isotope  16X  and  18X in the sample?      2                                                                                                                                                                                                    
12. Why does a wooden block float and an iron block sinks when both are placed on the surface of
     water ?      2                                                                                                                     
13. The gravitational force of attraction between two masses is 16 N. What would be the force of attraction between them if each mass and the distance between them are doubled?      2
14. A child winds his toy car by moving its key. Name the type of energy –
      i) used up in the process
     ii) energy transformation taking place in it
       The car then runs on the floor of the room. Give the transformation of energy taking 
       place in it now.      2
15.  To increase productivity per unit area ,the farmers grow two different types of crops on  
        the same field in definite rows. What is this practice called? What care is required to be  
       taken before selecting two crops for such practice and why? Give any two reasons.      3                                                 
 16. Draw a neat diagram of the leaf epidermis showing pores through which exchange of gases   
      takes place. Label any two parts giving one function of each.       3  
17.   i) Which of the following diseases are protozoan in origin?    
  a) Dengue      b) Malaria          c) Kalaazar          d) AIDS
       ii) Suggest any two ways you would like to adopt, to prevent being infected by them.               
18. Write two properties each of a solution, suspension and a colloid with respect to
      stability and filterability.      3           
19. (i) State ‘Law of constant proportions’.
      (ii) Taking the example of water, explain the law of constant proportions.
     (iii) Which postulate of Daltons’ atomic theory explains this law?                                 3

20.    (i) Write the names of the compounds represented by the following formulae:
             a) Na 2S                      b) KNO 3
        (ii) Write the chemical formulae of :
a)     Aluminum Chloride
b)     Magnesium oxide
             (iii) Find out the mass of 12.044 × 10 23 atoms of magnesium (Given at mass of  Mg = 24.0µ)            3          
21. A stone is dropped from the edge of the roof.
    a) How long does it take to fall 4.9 m?
    b) How fast does it move at the end of the fall?                                       
    c) What is its acceleration after 1s and 2s?                                              
         (given that g = 9.8 m/s2)                        

Click to View Complete Sample Paper
 (all questions, Marking Scheme, Solutions)                                               

Class 12 Viva Voce guide with questions and answers for CBSE Science - Surface Chemistry

Class 12 Science Practical Projects Viva Voce Guide
 SURFACE CHEMISTRY (Part - I) - 12th Viva Voce guide representative image
Question 1. What is a true solution?  Give an example.
Answer: A homogenous mixture of two substances, in which particles of both possess molecular dimensions (i.e., 10-10 to 10-9 m). For example, a solution of common salt in water.
Question 2. What is a colloidal solution?  Give an example.
Answer: A colloidal solution is a two-phase heterogeneous system in which a substance is distributed in colloidal state (particles having diameter between 1 to 100 nm) in a medium. The particles of the dispersed substance (of colloidal size) are called dispersed phase; while the medium in which they are dispersed, is called dispersion medium.  For example, milk, butter, smoke, etc. 
Question 3. What is the size of colloidal particles?
Answer: Diameter of colloidal particles is between 1 - 100 nm.
Question 4. What are lyophilisation and lyophobic sols?
Answer: A lyophilic sol is a colloidal solution in which there is great is affinity between colloidal particles and the dispersion medium. For example, starch sol, gum sol etc.
A lyophobic sol is a colloidal solution in which there is little affinity between colloidal particles and the dispersion medium. For example, sulphur sol, gold sol, etc. For example, starch sol is a lyophilic sol whereas sulphur sol is a lyophobic sol. 
Question 5. Give two examples of positively charged sols.
Answer: Ferric hydroxide sol and aluminium hydroxide sol.
Question 6. Give example of negatively charged sol.
Answer: Arsenious sulphide sol.
Question 7. Why cannot we prepare a colloidal solution of a gas in a gas?
Answer: The mixture of any two gases is always a homogeneous mixture whereas a colloidal solution is always heterogeneous.
Question 8. How can a colloidal solution and a true solution of the same colour be distinguished from each other?
Answer: A colloidal solution and a true solution of the same colour can be distinguished by passing a powerful beam of light through true and colloidal solutions, each kept in glass vessel. Only colloidal solution exhibits Tyndall Effect whereas true solution does not.    
Question 9. Define the term “Dialysis”. Tell about the use of dialysis.
Answer: The process of separating electrolytes from a colloid by means of diffusion of the former through an animal or vegetable membrane is called Dialysis.
Dialysis is used for purifying colloidal solution. In the presence of excess of electrolytes, the colloidal solutions get coagulated.
Question 10. Can we make Dialysis fast? If yes, how?
Answer: By circulating hot water instead of cold water, in container or by applying electric field across the dialyser.
Question 11. What is “Coagulation”?
Answer: Coagulation is the process of changing the colloidal state into an insoluble precipitate, by including aggregation of colloidal particles.
Question 12. Name a few methods of coagulating lyophilic colloids.
Answer: (i) Addition of electrolyte. (ii) Addition of a liquid in which the dispersion medium is soluble.
Question 13. What is meant by “Peptization”?
Answer: The method of breaking down a precipitate into colloidal form by shaking with the dispersion medium in presence of an electrolyte is called “Peptization”.     
(To be continued ...)
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CBSE Guess Paper, Practice Paper | Class IX, Science - Physics

CBSE Guess and Guide Sample Paper
Class IX Science (Physics)

Time 3 Hours                                                                                  M.M.20
Q.1. What is persistence of hearing?          [1]
Q.2. What does the slope of speed-time graph indicate?          [2] 
Q.3. What is one Newton?          [1]
Q.4. Why will a sheet of paper fall lower than one that is crumpled into a ball?          [2]
Q.5. A stone is dropped from the edge of a roof.          [4]
          (a) How long does it take to fall 4.9m?
          (b) How fast does it move at the end of that fall?
          (c) How does it move at the end of 7.9m?
          (d) What is its acceleration after 1 second and after 2 second?  
Q.6. A boy and a girl do the same work in 5 min and 10 min respectively. Which of these has more power and why?          [1]
Q.7. (a) What name has been given to the force with which two objects lying a part attract each other?
        (b) What happens to the gravitational force between two objects when the distance between them is - (i) doubled  (ii) half          [2]
Q.8. (a) What is the condition for a force to do work on a body?
        (b)  A boy throws a rubber ball vertically upwards. What type of work, positive or negative is done: (i) By force applied by boy? (ii) By the gravitational force of earth?          [3]
Q.9. Name the characteristics of sound which depends on: (i) Amplitude  (ii) Waveform          [1]
Q.10. Give one use of ultrasound in industry and one in hospitals?          [1]
Q.11. A sonar station picks up a return signal after 3seconds. How far away is object? (speed of sound in water=1440m/s)          [1]
Q.12. Name that part of ear which vibrates when outside sound fall on it?          [1] 

Class 9 CBSE Guess Paper on Science - Atoms and Molecules

Class 9 CBSE Science Guess PaperSubject – Science (Chemistry)(Atoms and Molecules)

Time 1 hr                                                                                           M.M. 20
Section - A  [5x1 = 5]
1. An element Z forms a formula ZO3. Find the valency of Z and O in this formula.
2. Write the formulae of the following ions
    (a) sulfide ion  (b) sulphite ion
    (c) carbonate ion  (d) hydrogencabonate ion
3. Give an example of conservation of mass theory.
4. State whether this statement is true or false: “The symbol of cobalt is CO”.
5. Write the full name of IUPAC.

Section - B  [5x2 = 10]
6. Define Mole with example.
7. What is the mass of .5 mole of water (H2O).
8. Calculate the molecular mass of HNO3. (Atomic mass of H= 1u, N = 14 u and O = 16u.)
9. Calculate the number of iron atom in the piece of iron weighing 2.8 g (atomic mass of iron is 56u)
10. Which postulate of Dalton’s Atomic theory can explain the law of conservation of mass?
11. Write the all three law of chemical combination.

Section - C  [2x5 = 10]
12. Sodium carbonate reacts with ethanoic acid to form  sodium ethanoate, carbon oxide and water. In an experiment 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid to from 8.2 g sodium ethanoate. 2.2 g carbon dioxide and 0.9 g water. Show that this data verifies the law of conservation of mass.
13. Define the molecular mass. Calculate the molecular mass of sulphuric acid and CH3COOH and C6H12O6.
Class IX Science - ATOMS AND MOLECULES (Related Posts)

Hindi Essay Nibandh or Rachna on Swami Vivekananda स्वामी विवेकानन्द

Write a short essay in Hindi (Nibandh or Rachna) on Swami Vivekananda स्वामी विवेकानन्द - Kisi Mahapurush ke jeevni par lekh (short paragraph) on the life of any great person  

Hindi essay (nibandh) on Swami Vivekananda - image
स्वामी विवेकानन्द का जन्म १२ जनवरी १८६३ कोलकाता में हुआ था। उनका बचपन का नाम नरेन्द्रनाथ था। पिताजी विश्वनाथ दत्त कोलकाता में वकील थे तथा माताजी भुवनेश्वरी देवी एक सीधी-साधी, धार्मिक विचारों की महिला थी।

नरेन्द्रनाथ का बचपन शरारतों से भरा था। बचपन से ही वह निडर, प्रतिभावान तथा साहसी स्वभाव के थे। पढ़ाई-लिखाई में भी सबसे तेज़ थे जिसके कारण स्कूल में अपने सहपाठियों से हमेशा आगे रहते थे। खेल-कूद में भी नरेन्द्रनाथ समान रूप से कुशल थे। वाद-विवाद की सभा में उनका तर्कयुक्त भाषण सुनकर अध्यापकों को हर्षपूर्ण आश्चर्य होता था।

घर में हमेशा धर्म, दर्शन, समाज और राजनीति आदि विषयों पर चर्चा होती थी जिसका प्रभाव नरेन्द्रनाथ पर पड़ा। उन्होंने भारतीय दर्शन के साथ-साथ पश्चिमी दर्शन का भी अध्ययन किया। दक्षिणेश्वर काली मंदिर में नरेन्द्रनाथ भी रामकृष्ण परमहंसजी से मिले। श्री रामकृष्ण महाप्रभु का गहरा ईश्वर प्रेम, निस्वार्थ प्रेमभाव तथा उदार स्वभाव ने नरेन्द्र को अपने वश में कर लिया। नरेन्द्रनाथ उनको अपना गुरुजी मानने लगे और रामकृष्ण परमहंस भी नरेन्द्र को हृदय से प्यार करते थे।

परमहंसजी की मृत्यु के बाद नरेन्द्रनाथ ने सन्यास ले लिया और तभी से उनका नाम विवेकानंद पड़ा। - image of Swami Vivekanandaस्वामी विवेकानन्द अपने गुरु के अधूरे काम को पूरा करने में जुट गए। वे भारत-भ्रमण के लिए निकल पड़े और परमहंसजी के विचारों को लोगों तक पहुँचाया।

उन्होंने आगे चलकर रामकृष्ण मिशन की स्थापना की। सन १८९३ में स्वामी विवेकानन्द ने अमेरिका की शिकागो शहर में अनुष्ठित एक सर्वधर्म सम्मेलन में भाग लिया। यहाँ उन्होंने वैदिक धर्म को सभी धर्मों का स्रोत बताते हुए विश्व के सभी मतों और धर्मों का अभिनंदन किया तथा परस्पर सहयोग एवं शांति पर बल दिया।

कठोर जीवन और अस्वस्थ रहने के कारण ४ जुलाई १९०२ को अत्यंत कम उम्र में ही उनका देहावसान हो गया। स्वामीजी ने संसार को मानवता का वह संदेश दिया जिसे याद करके आज भी लोग प्रेरित होते हैं। उनके विचार में मानव जाति का कल्याण करना ही मानव का धर्म है। अपने विचारों से ही स्वामी विवेकानंद देश व राष्ट्र की सीमा लाँघ कर सारे संसार में अमर होकर रह गए।

Leave application in Hindi to Principal | Chhutti ke liye Pradhanacharya ko Avedan Patra

Write a leave application in Hindi to Principal (Head Master) | Chhutti ke liye Vidhyalay  Pradhanacharya ko Avedan Patra | प्रधानाचार्य को छुट्टी के लिए आवेदन पत्र लिखिए :

दिनांक: ..................
सेवा में, 
श्रीमान प्रधानाचार्य महोदय,
केंद्रीय विद्यालय,
संकेत नगर, शालीमार

द्वारा: वर्गाध्यापक महोदय

वविनम्र निवेदन है कि अगले महीने में मेरी बड़ी दीदी की विवाह होने जा रहा है। इस लिए १० दिसंबर से २० दिसंबर, २०१७ तक मैं विवाह संबंधित घरेलू काम-काज में पूर्ण रूप से व्यस्त रहूंगा।

अतः, श्रीमान से मेरा विनम्र प्रार्थना है कि उपर्युक्त अवधि तक मेरा अवकाश स्वीकृत करने की कृपा करें। आपकी इस कृपा के लिए मैं सदा आपका आभारी रहूंगा।

आपका आज्ञाकारि शिष्य,
अखिलेश प्रसाद
अष्टम वर्ग, क्रमांक - ६

For more applications click