Class 12 physics question bank

Download an excellent collection of questions with answers for CBSE Class 12 Physics

Question Bank in Physics Class XII

The collection will also be helpful for students of other syllabuses.

Central Board of Secondary Education

The file consists of syllabus, key points, collection of very short Answer (1 mark), Short answer type question – solved (2 marks), short answers (3 marks), Long answers (5 marks), Solved numericals and 3 sample papers.

The contents are arranged chapter-wise. Any student will find this a boon for easy preparation and to score better marks in Physics.

Career Prospects in the field of Statistics and Economics

What are career prospects in the field of Statistics and Economics?

Economics being a social science is considered to be very vital in analyzing the effects of production, sales including consumption of goods on the economy of the user or the common man. The concept of economics is applied in every field; be it an industry, agricultural sector, banking sector, labor sector the principles of economics has a dominant role to play. In fact many of the leading industries including banks engage the services of economists to advise the industry or the organization on many of the policy matters including those involving production and matters relating to financial propriety and a host of other relevant issues. Every government will engage the services of economists to advise the government on various issues concerning the government policies on price control, banking regulation and such other related matters.

Those who aspire to take up economics as a career have the option to take up diploma course in economics. However, from the career prospects the diploma course may not be much feasible. Therefore, it is advisable that they take either graduate or postgraduate course in economics. As already mentioned in economics there are several areas of specialization like for example agricultural economics, industrial economics etc. Therefore depending on the specialization the career can be preferred. Remember, your opinion as an economic adviser has great value in terms of forming the future policies of the organization. Therefore it is a very prestigious and equally a responsible position.

A statistician is the person who works out with the data available all around us and as one expert puts it he ‘churns out’ the result. With his innovative approach and scientific principles he draws conclusions to various issues and it forms the basis for your policy making and plan future course of action. Every organization and particularly industries and the government need statistical data to regulate their work and also take effective policy decisions. Similar to economics, the curriculum in statistics consists of diploma, bachelor as also post-graduate courses. However in order to have promising career, it is advisable to complete either the graduate or post-graduate course with specialization.

According to experts, similar to economists, the carrier as statistician is very much promising. Considering the impact of statistical analysis on the future policies of the organization the position of statistician is considered to be very much important and it is one of the highly regarded positions. Normally, statisticians are appointed as consultants. However, some of the organizations and particularly the government would appoint them on a permanent basis or at least on a contractual obligation for certain period of time. Agriculture, industry and banking sector need the assistance of statisticians on a regular basis. It is also said that some of the educational institutions also require statisticians on teaching assignment. Those who have aptitude for teaching can look for these positions.  In fact some of the experienced statisticians even establish their own consultancy services where they even coordinate with experienced economists so that the client would get both the services in one roof.

Class XI CBSE Chemistry Model Paper


Class – XI

Time – 3 Hrs. Marks – 70


General Instructions :

i) All questions are compulsory.

ii) Q. s 1 to 8 carry 1 makes each. Answer them in one word or in about on sentence.

iii) Q. s 9 to 18 carry 2 marks each. Answer these in about 30 words each.

iv) Q. s 19 to 27 carry 3 marks each. Answer these in about 40 words each.

v) Q. s 28 to 30 are long answer questions carrying 5 marks each.

vi) Use long table if necessary, use of calculator is not permitted.


1. Write IUPAC name of the following compound : 1


2. Write down the formula of the monomer of silicone. 1

3. What would be the effect of increasing pressure on the equilibrium. 1

PCl5 (g) = Pcl3 (g) + Cl2 (g) ?

4. What is the oxidation number of oxygen in Na2O2 ? 1

5. What would be the sign of S for the process 2H (g) à H2 (g) ? 1

6. What is compressibility factor of a gas ? 1

7. Configuration of ion M+2 is Is2 2s2 2p5 what is configuration of atom M? 1

8. How many oxygen atoms would be there in 1 mole of H2SO4 ?

9. clip_image004 a) What is the hybridization of each carbon in CH3 – CH2 ? 1

b) What is the function of AlCl3 (anhyd) in Friedel Crafts reaction ? 1

10. How N and S are detected when present in an organic compound together ? (Reaction only) 2


Which is the electrophillic centre in CH3Br and why ?

11. Why lithium does not form a superoxide but potassium does ? 2


Why BeSO4 is water soluble but BaSO4 is not ?

12. Balance the following redox feaction by ion 2

Electron method :

Cr2 O7-2 + Fe+2 à Fe+3 + Cr+3 in acidic medium.

13. a) What is the change in internal energy in a process in which 700J of heat is absorbed and 450J of work is done by the system ?

b) Define a spontaneous process in terms of Gibbs energy. 1

14. Show by MO concept which one out of O2 and O2+ would be more stable. 2


Explain all the orbital overlaps in a molecule of ethene (C2H4) by drawing a sutitable diagram.

15. Calculate the mass of (NH4)2 S required to prepare 200 ml of O.1 molar aqueous solution.

(N = 14, H = 1, S = 32)

16. a) Write down the IUPAC name and symbol of the element with at no 119. 1

b) Why Cl has more negative electron gain enthalpy then F in group 17 ? 1

17. Arrange the species : F, O-2, N-3, Mg + 2, Al + 3 and Na+ in the increasing order of ionic radii and give reason. 2


2008 DELHI

· Which country has the lowest sex ratio in the world? What is its sex ratio?

· Name the country which has the highest human development index


· Name the country where practically every farmer is a member of a cooperative society


· Which stream of migration is dominated by male migration in India?

Rural to urban

· What is the rank of India in human development index among the countries of the world in 2005?

· What is the meaning of human settlement?

· Which are the two main types of iron ore found in India

· What was the main aim behind establishing border road organisation in India

· Name the biggest sea port of India

· What is the main reason of degradation of the quality of water in India

· State six approaches of human geography

· Explain with examples any three geographical factors which influence the distribution of population in the world.

· Explain three characteristics of modern large scale manufacturing in the world

· Compare the features of rural and urban marketing centres of the world in three points Continue reading “GEOGRAPHY PREVIOUS QUESTIONS FROM BOARD EXAM FOR CLASS XII”

Awareness Programme on ‘IPR for Inventions and Creations’

Awareness Programme on ‘IPR for Inventions and Creations

Jointly Organized by PIC-Kerala/ KSCSTE & KendriyaVidyalaya, Pattom, Trivandrum

on 19th November, 2011

Venue: Resource Room KendriyaVidyalaya, Pattom


Programme Schedule 19-11-2011

09.00 am – 09.30 am Registration
09.30 am – 10.00 am Inaugural Session
10.00 am – 11.00 am Keynote Address

Dr. AchuthSankar S. Nair

Director, Centre for Bioinformatics &Co-ordinator,

IPR Cell, University of Kerala,

Kariavattom, Trivandrum.

11.00 am – 11.15 am Tea Break
11.15 am – 12.30 pm Technical Session

‘IPR – Tool to protect inventions and creations’

Shri. V.P. Balagangadharan

Brahmaprakash Scientist,

VSSC, Thiruvananthapuram

12.30 pm – 01.00 pm IPR Quiz Competition & Concluding Session

Dr. Achuthsankar S. Nair

Dr. Achuthsankar S. Nair heads the State Inter University Centre of Excellence in Bioinformatics, University of Kerala.  He had his BTech (Electrical Engineering) from College of Engineering, Thiruvananthapuram and MTech (Electrical Engineering) from IIT Bombay. He also holds an M.Phil in Computer Speech and Language Processing from the Dept of Engineering, University of Cambridge, UK and PhD from University of Kerala.

Since 1987, he has taught in various Engineering Colleges, Universities and Institutes both within India and abroad. During 2001 – 2004 he served as Director of Centre for Development of Imaging Technology, C-DIT, an autonomous techno-creative centre of Govt. of Kerala. In 2006 he was a Visiting Professor in University of Korea, Seoul.

He has authored 10 popular-science books on IT in Malayalam, including one on the internet in 1996 and one on Free software in 2002. His current research interests include use of digital signal processing (DSP) in bio-sequence analysis. He has a modest number of research publications in International & Indian Journals. One of his contributions on electro-mechanical model for the Transistor is cited in the classic text book: Hughes’s Electrical Technology (7th Edition) published by Orient Longman, UK.

He has widely traveled and given talks in hundreds of venues including Universities, a very large number of colleges in Keralam, University of Madras, Indore University, Bharathi Dasan University, Jawaharlal Nehru University, National University of Juridical Sciences, Culcutta and the Madras Music Academy.

He is recipient of Young Scientist Award of Govt. of Kerala (1991), Cambridge Barclay Scholarship (1991), ISTE National Award for Young Engineering Teachers (1994). He is a member of Computer Society of India, IEEE, Indian Society for Technical Education, and International Society for Computational Biology. He is currently a member of the Executive Committee of State Higher Education Council of Govt. of Kerala



Shri. V.P. Balagangadharan is the Brahmaprakash Scientist in VSSC. He is the link between the centre and ANTRIX Corporation, Bangalore.

In his capacity, Shri. V P Balagangadharan is responsible for all intellectual property related matters of the centre. He has facilitated more than 60 patents and about a dozen copyright and a few designs.

ShriBalagangadharan has undergone many training programmes in IPR, has taken the DL-01 course on IPR by World Intellectual Property Organisation, has given many invited lectures (nearly 50) on IPR and conducted classes for many IPR awareness programmes. He has also conducted Induction programs on IPR to students. He has facilitated filing of 40 patents and 20 technology transfers to industry. He is also a member of the ISRO level standing Committee on IPR.

He was born in 1950 in Payyanur. Postgraduated in Chemistry and Joined VSSC in 1972. He possess 27 years of expertise in analytical chemistry at VSSC. He is an Expert in material characterization and published 30 papers in international journals and seminars.

Apart from his professional expertise, he is well known for his science communication through articles, lectures, radio and TV. He is a member, fellow and office bearer of many professional bodies.

He has been closely associated with KSCSTE. He is a member of IPR Advisory Committee, member of State Level IPR Standing Committee and chairs similar IPR related Committee.

CAT 2011 Highlights

Indian Institutes of Management (IIMs) have announced the Common Admission Test 2011 (CAT 2011) highlights. Prometric, a provider of market-leading test development and test delivery solutions is IIMs’ partner in developing and delivering CAT 2011. The first section will consist of Quantitative Ability & Data Interpretation. Whereas, the second section will focus on Verbal Ability & Logical Reasoning. These two sections will be implemented sequentially with separate time limits.

The examination will be 140 minutes. Within each section, candidates will have 70 minutes to answer 30 questions which will have an on-screen countdown timer.

Educational Leadership linked to Student Achievement :: Study

A new study has claimed that good school leadership is critical to good education.
Researchers Kila vahlstrom and karen seashore Levy of the University of Minnesota College of Education and Human Development and Kenneth leithvood and Steven Anderson of the University of Toronto, have wide Implications for the understanding of how leadership affects learning across the United States.
"Leadership is important because it sets the conditions and the Expectations in the school that it will be excellent instruction and there will be a culture of ongoing learning for the Educators and for the students in the school," said vahlstrom. image
The report Learning of Leadership: investigating the links to improved student learning, found that student achievement is higher in schools where principal share leadership with teachers and the community.
After finding was that Districts where levels of student learning are high, district leaders are March probably to emphasize goals and initiatives that reach beyond minimum state Expectations for student performance.
There are a few Challenges, though, such as – Stark lack of district support for Principal ‘professional development, lack of regular contact between most principal and their district office and away from comprehensive Approaches to education reform in most States.
"So leadership absolutely makes a difference. I can not say that strongly enough, good leadership is critical to good education," said vahlstrom.

India Unveils A Portable Computing Device Worth Rs 1,600

Read the PIB release here

Today in New Delhi, union minister for Human Resource Development, Shri Kapil Sibal unveiled a low cost computing-cum-access device. The expected price of the showcased model is going to be around US$35 (approximately Rs 1,640) per unit, which is expected to gradually dip to about US$20 and will eventually to around US10$.

image Since the ongoing reduction in cost and enhancing the capabilities require constant research and development, IIT Rajasthan and other technical institutions are setting up research teams to look into a wide range of potential issues in the course of achieving the ultimate goal in terms of price and quality.
The press release issued by the Ministry of HRD also states the primary aim, which is, to reach these low cost devices to students and teachers of all colleges and universities, which will enable them to gain access to high-quality digital content. As stated, the three cardinal principles of the Education Policy viz., access, equity and quality could be served well by providing connectivity to all educational institutions, providing low cost and affordable access cum computing devices to students and teachers and providing high quality e-content free of cost to all learners in the Country. National Mission on Education through ICT (NMEICT) encompasses all the three elements.

Connectivity to Universities and Colleges has already started. Nearly 8500 Colleges in the country have already been connected, high quality e-content in various subjects is being created and under the National Programme on Technology Enhanced Learning (NPTEL), nearly 500 web based and video courses are available and uploaded on “sakshat”, YouTube and NPTEL portals and another 1100 courses in various disciplines of engineering and science are getting generated in 4 quadrant approach.
image The ministry started its efforts, subsequent to lukewarm response from known corporates in this sector, by holding discussions on this concept with a group of professors / experts at IISc, Bangalore, IIT Kanpur, IIT Kharagpur, IIT Madras and IIT Bombay. B.Tech and M.Tech students were guided to produce the motherboard for such low cost devices with ample room for upgrade / change in hardware components. One motherboard design was generated under Ministry’s guidance in the B.Tech project of a student at VIT, Vellore. The cost of bill of material worked to 47 $ at that point of time. The motherboard PCB was fabricated at IIT Kanpur. It could be seen that, by customizing the device to the needs of learners across the country, and utilizing the capabilities of CPU suitable for the purpose, it was possible to substantially reduce the prices of such access-cum-computing devices. Then, a wave of collaboration with such interested partners began.
Ever since, various teams have been moving back and forth independently, yet constantly interacting with the HRD Ministry and improving upon design parameters and customization guidance for Indian students. The efforts of some of the teams working with those design philosophies were presented today. The aim is to reach such devices to the students of colleges and Universities and to provide these institutions a host of choices of low cost access devices around Rs. 1500/- ($35) or less in near future.

Airbus launches global student contest for eco-efficient flight ideas

Farnborough: Students from Indian universities have an opportunity to compete in a global contest to develop eco-efficient air travel ideas launched by European aircraft giant Airbus at the Farnborough Air Show on Wednesday.Airbus launched its second b…

Farnborough: Students from Indian universities have an opportunity to compete in a global contest to develop eco-efficient air travel ideas launched by European aircraft giant Airbus at the Farnborough Air Show on Wednesday.Airbus launched its second bi-annual global students’ contest “To shape the …

Ex-LTTE rebels to apply for university courses

Colombo: Over 300 former Tamil Tiger rebels, currently under rehabilitation, will sit for an examination that would prepare them for higher education in the universities, the government said on Monday.Brigadier Sudantha Ranasinghe, commissioner general…

Colombo: Over 300 former Tamil Tiger rebels, currently under rehabilitation, will sit for an examination that would prepare them for higher education in the universities, the government said on Monday.Brigadier Sudantha Ranasinghe, commissioner general of rehabilitation, said 378 ex-LTTE (Liberation…