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(Download) CBSE Class-10 2016-17 Sample Paper And Marking Scheme (Chemistry)

Posted: 26 Dec 2016 04:22 AM PST

(Download) CBSE Class-10 2016-17 Sample Paper And Marking Scheme (Chemistry)

Time allowed: 03 Hours

Maximum Marks: 90

General Instructions:

(i) The question paper comprises two sections, A and B. You are to attempt both the sections.
(ii) All questions are compulsory.
(iii) There is no choice in any of the question.
(iv) All questions of Section-A and B are to be attempted separately.
(v) Question numbers 1 to 3 in Section-A are one mark question. They are to be answered in one word or in one sentence.
(vi) Question numbers 4 to 6 in Section- A are two marks questions. These are to be answered in 30 words each.
(vii) Question numbers 7 to 18 in Section-A are three marks questions. These are to be answered in about 50 words each.
(viii) Question numbers 19 to 24 in Section-A are 5 marks questions. These are to be answered in 70 words each.
(ix) Question numbers 25 to 33 in Section- B are multiple choice questions based on practical skills. Each question is a one mark question. You are to select one most appropriate response out of the four provided to you.
(x) Question numbers 34 to 36 in Section B are two marks questions based on practical skills. These are to be answered in brief.

Section A

1 Name the process of converting vegetable oil to vegetable ghee. 1

2 List two secondary sexual characters of males that are different from that of females.

3 Write the main function of Ozone in the upper atmosphere 1

4 When a concave mirror is placed facing the Sun, the Sun's rays converge to a point 10 cm from the mirror. Now, if you place a 2 cm long candles flame 20 cm away on the principal axis of the mirror, where would you place a screen to obtain the image of the candle? What would see the size of the image? Draw a ray diagram to justify your answer.

5 If you find coliform bacteria in a sample of water collected from a river, what would you conclude? Give reason for such kind of water pollution.

6 Which natural resources are called the "biodiversity hot spots"? How these hot spots maintain ecological balance?

7 What are isomers? "Isomers of the first three members of alkane series are not possible". Give reason to justify this statement and draw structures of two isomers of butane, C4 H10.

8 An organic compound 'X' is a liquid at room temperature. It is also a very good solvent and has the molecular formula C2 H6 O. on oxidation 'X' gives 'Y' which give, break effervescence on reacting with NaHCO3. X reacts with Y in the presence of conc.H2SO4to give another compound 'Z' which has a pleasant smell. Identify X, Y and Z. also write chemical equations to show the formation of Y and Z.

9 An element 'A' belongs to 3rd period and 17th group of the periodic table.

a) Write atomic member and electronic configuration of 'A'
b) State whether A is a metal or a non – metal.
c) Write the nature of bond formed if A reacts with another element B of electronic configuration 2, 8, 1.
d) Write the chemical formula of the compound formed.

10 Consider the following elements 4Be, 9F, 19K, 20Ca

a) Select the element having one election in the outer most shell.
b) Select two elements of the same group.
c) Write the formula and state the nature of the Compound formed when the element K reacts with an element X of electronic configuration 2, 8, 7.

11 Explain with the help of labelled diagrams the development that takes place in each of the body parts of a Planaria where body is cut into three pieces. None this process and give an example of an organism in which a similar process can be observed.

12 List any four methods of contraception used by humans. How does the use of three methods have a direct effect on the heath and prosperity of a family?

13 List two functions each of the following points of human female reproductive system
a) Ovaries
b) Fallopian tubes
c) Uterus

14 "Different species use different strategies to determine sex of a new born individual. It can be environmental cues or genetically determined". Justify this statement giving reason/example.

15 List in tabular form, two distinguishing features between the acquired traits and the inherited traits with one example of each

16 A student has to project a three times magnified image of a candle flame on a wall. Name the type of the lens (converging/ diverging) required for the purpose. It the candle flame is at a distance of 6 m from the wall, find the focal length of the lens.

17 A child while playing with his father's spectacles burnt a hole in a piece of them tissue paper by focusing the image of the Sun on at.
a) Name the defect of vision his father is suffering form.
b) List two causes of the defect.
c) Draw a ray diagram to show how this defect may be corrected using a suitable lens.

18 Some residents of your colony are planning to cut trees to create a place for parking vehicles. You are upset by knowing all this and wanted to do something to create awareness about the importance of trees.

(a) List any three reasons that you will use to convince residents of your colony not to cut the existing trees.
(b) List any three values that would be inculcated amongst them with such approach.

19 a) State two main reasons for carbon forming a very large number of compounds.
b) Give reason why carbon forms compound
(i) Namely by Covalent bonding
(ii) Having low melting and boiling points

c) What happens when (Write chemical equations of the reactions)
(i) A piece of sodium metal is added to ethanol.
(ii) Ethanoic acid reacts with sodium hydroxide.

20 A. Draw a longitudinal section of a flower and label the following parts –
a) Part that develops into a fruit
b) Part that produces pollen grain
c) Part that transfers male gametes
d) Part that is sticky to trap

B. Write the names of the parts labeled as A, B, C, D in the diagram given below:

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(Download) CBSE Class-10 2016-17 Sample Paper (Elements Of Book Keeping And Accountancy)

Posted: 26 Dec 2016 04:14 AM PST

(Download) CBSE Class-10 2016-17 Sample Paper (Elements Of Book Keeping And Accountancy)

Q1. The purpose of preparing final accounts is to ascertain: 1

a) Profit or loss
b) Capital
c) The value of assets
d) Profit or loss and financial position

Q2. Trading Account shows:

a) Financial position of the concern
b) Gross profit
c) Net profit
d) Net profit and financial position

Q3. Balance sheet shows: 1

a) Profit or loss
b) Financial position
c) Errors of accounts
d) Total debtors

Q4. Trading and Profit & Loss Account is prepared: 1

a) At the end of calendar year
b) At the beginning of the accounting year
c) On every Diwali
d) At the end of accounting year

Q5. Balance Sheet is prepared: 1

a) For a particular period
b) On a particular date
c) For the whole year
d) For a decade

Q6. Balance sheet shows: 1

a) Assets only
b) Liabilities only
c) Both assets & Liabilities
d) Neither assets nor liabilities

Q7. Excess of credit in Profit and Loss account is called: 1

a) Net profit
b) Net loss
c) Gross profit
d) Gross loss

Q8. Wages and Salaries appearing in Trial Balance is shown: 1

a) On the debit side of Trading A/c
b) On the debit side of Profit and Loss Account
c) On the Asset Side of the Balance Sheet
d) On the liabilities side of Balance Sheet

Q9. Land is: 1

a) Current Asset
b) Fixed asset
c) A liability
d) Capital

Q10. Identify the current asset from the following: 1

a) Plant
b) Cash at bank
c) Creditors
d) Capital

Q11. Generally accounts under single entry system are maintained by: 1

a) Sole Trader
b) Company
c) Society
d) Partnership Firms

Q12. Single entry system of book keeping is: 1

a) Accurate
b) Systematic
c) Unscientific
d) Rationale

Q13. When closing capital is more than the opening capital, it denotes: 1

a) Drawings
b) Loss
c) No profit no loss
d) Profit, if there is no introduction of fresh capital

Q14. When closing capital is less than the opening capital, it denotes: 1

a) Profit
b) Loss
c) Loss, if there is no drawing
d) Expenses

Q15. Which of the following is correct about Single Entry System: 1

a) Simple Method
b) Difficult Method
c) Expensive Method
d) Both difficult and expensive method

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(Download) CBSE Class-12 2016-17 Sample Paper And Marking Scheme (Creative Writing and Translation Studies)

Posted: 26 Dec 2016 03:04 AM PST

(Download) CBSE Class-12 2016-17 Sample Paper And Marking Scheme (Creative Writing and Translation Studies)

Max. Marks: 80


The Question paper is divided into three sections:

Section A: Reading Comprehension 20 marks
Section B: Creative Writing Skills 20 marks
Section C: Translation 20 marks
Section D: Text 20 mark

General Instructions

1. All questions are compulsory.
2. You may attempt any section at a time.
3. All questions of that particular section must be attempted in the correct order.


Reading – 20 marks

1. Read the passage given below and answer the questions that follow:

 Yoga Tourism opens up tremendous opportunities as it is for everyone. People of all generations and fitness levels can find classes suitable for them.The practice of Yoga also helps one to achieve peace and tranquility through focused training. At the time when job responsibilities, kids' needs, spouse's demands, and never-ending to-do lists can easily overwhelm us, yoga teaches us to relax, de-clutter our minds, and create a space for ourselves where we can be happy and at peace with ourselves.

There are many forms of 'yoga' one can pursue, depending on one's preferences and lifestyles. There is relaxation yoga where breathing exercises and meditation techniques are stressed upon; there is power yoga for those who are looking to increase their body's stamina and resistance power; there is prenatal yoga for pregnant women, and there is Hatha Yoga for beginners who want to learn basic postures at a comfortable pace.. We need to remember that 'Yoga' for Indians and 'Yoga' for foreigners is not the same thing. Many American yoga students, for example, are fiercely independent and self-reliant. For some, yoga is a not-too-strenuous way to lose fat effectively, or reduce their stress. For others, yoga might mean doing strenuous postures to become more flexible, firm up their abs, or attain slender muscularity. Others might be looking for ways to reverse the onset of lifestyle diseases like diabetes and arthritis. This commodification of 'Yoga' is crucial today, if you want to earn from it.

June 21 has created an opportunity for the entire Indian travel and tourism fraternity to boost inbound tourism to the country. Yoga tours are already being conducted regularly, with clientele from France, USA, Germany, Russia, and several other countries. With the World Yoga Day branding, the Yoga is now known all over the world, and the niche tourism products in the field with dedicated Yoga packages are bound to do well in such a scenario.

Yoga tourism is not only good for ashram services sector but also for hospitality sector in general. Besides foreign tourists, corporate houses and companies from India and abroad popularly opt for Yoga sessions for their employees as offsite training programmes. It presents several more opportunities for those who are working for the tourism industry.

Here is a word of caution though. Despite all the branding and marketing efforts, Yoga tourism can only pick up when we offer quality to the tourists. India has an edge over countries because the trips to India are moderately priced and offer several budget options too. It is also believed to be the country where roots of Yoga lie. If you can build upon premise, and offer world-class services and real results to wellness tourists, you are bound to do well as Yoga tourism operator, trainer or service provider.

1.1 On the basis of your understanding of the passage answer the following:--

a. Would you want to visit a country for yoga tourism? Why or why not?
b. What drawbacks do you think yoga tourists might find in India?
c. How are power yoga and relaxation yoga different?
d. How can yoga tourism be encouraged in India?
e. Find words from the passage which mean the same as the following:-

i calmness
ii capable of bending

2 Read the story given below and answer the questions that follow:-

I was driven one afternoon in November, 1896, by a rain of such chilling copiousness that any shelter was preferable to exposure. Now I found myself upon an apparently abandoned road which I had chosen as the shortest cut to Arkham, overtaken by the storm at a point far from any town, and confronted with no refuge save the antique and repellent wooden building which blinked with bleared windows from between two huge leafless elms near the foot of a rocky hill. Distant though it is from the remnant of a road, this house none the less impressed me unfavorably the very moment I espied it.

had somehow taken it for granted that the house was abandoned, yet as I approached it I was not so sure, for though the walks were indeed overgrown with weeds, they seemed to retain their nature a little too well to argue complete desertion. Therefore instead of trying the door I knocked, feeling as I did so a trepidation I could scarcely explain. As I waited on the rough, mossy rock which served as a door-step, I glanced at the neighboring windows and the panes of the transom above me, and noticed that although old, rattling, and almost opaque with dirt, they were not broken. The building, then, must still be inhabited, despite its isolation and general neglect. However, my rapping evoked no response, so after repeating the summons I tried the rusty latch and found the door unfastened. Inside was a little vestibule with walls from which the plaster was falling, and through the doorway came a faint but peculiarly hateful odor.

I entered, carrying my bicycle, and closed the door behind me. Ahead rose a narrow staircase, flanked by a small door probably leading to the cellar, while to the left and right were closed doors leading to rooms on the ground floor.

Leaning my cycle against the wall I opened the door at the left, and crossed into a small low-ceiled chamber but dimly lighted by its two dusty windows and furnished in the
barest and most primitive possible way.

On the basis of your understanding of the passage answer the following :--

a. What does the author mean when he says, " this house nonetheless impressed me unfavorably"
b. What kind of weather is described in the beginning of the passage?
c. Why did he think that the house was abandoned?
d. What was the condition of the house?
e. Why did he enter the room?
f. Find out a word from the story which means the same as --"not clear because of mist

3.Read the poem and answer the questions that follow:-

The sky is full of the sun and the stars
The universe is full of life
Among all these I have found a place
And in wonder and amazement I sing.
The world is swayed
By eternity's rushing tide
Rising and falling
I have felt its tug in my blood
Racing through my veins
And in wonder and amazement I sing.
While walking in the woodlands
With my feet I have touched the blades of grass
I have been startled by the flowers' fragrance
They have all maddened my mind
The gifts of gladness and joy
Are strewn all around
And in wonder and amazement I sing.
I have pricked my ears
I have opened my eyes
I have bared my heart to the world
In the midst of the known
I have sought the unknown
And in wonder and amazement I sing

a. What could be the reason for "wonder and amazement" in the first stanza?
b. What is the dilemma for the poet?
c. What could be the reason for the poet's amazement in the woodlands?
d. Name the poetic device used in the line- "They have all maddened my mind


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(Download) CBSE Class-12 2016-17 Sample Paper (Chemistry)

Posted: 26 Dec 2016 02:58 AM PST

(Download) CBSE Class-12 2016-17 Sample Paper (Chemistry)


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Olympiad: Homi Bhabha Centre For Science Education

Posted: 25 Nov 2016 09:58 PM PST

Olympiad: Homi Bhabha Centre For Science Education


The international Olympiad movement is aimed at bringing the most gifted secondary and higher secondary students of the world together in a friendly competition of the highest level. The Olympiads do not lead directly to any career benefits; rather, they provide a stimulus to begin a career in science or mathematics, to undertake a lifelong journey into the realms of exciting intellectual challenges. The Olympiads are not merely competitions, they are the meeting places of the brightest young minds of the world, and many friendships forged at the Olympiads form the seeds of scientific collaboration later in life. Much like the Olympics in sports, the Olympiads are a celebration of the very best in school level science and mathematics.

A major national Olympiad programme in basic sciences and mathematics which connects to the international Olympiads is in operation in India. The Homi Bhabha Centre for Science Education is the nodal centre of the country for this programme. The programme aims at promoting excellence in science and mathematics among pre-university students.

Among the sciences, the Olympiad programme in Astronomy (junior and senior level), Biology, Chemistry, Junior Science and Physics is a five stage process for each subject separately. The first stage for each subject is organized by the Indian Association of Physics Teachers (IAPT) in collaboration with teacher associations in other subjects. All the remaining stages are organized by Homi Bhabha Centre for Science Education (HBCSE). Read More....

Important Links:

Contact Details:

Homi Bhabha Centre for Science Education(TIFR)
V. N. Purav Marg,
Next to Anushakti Nagar bus depot,
Mankhurd, Mumbai - 400 088.
2507 2322 (Science Olympiads)
2507 2207 (Mathematical Olympiad)
Website: www.olympiads.hbcse.tifr.res.in

Courtesy: Olympiad

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