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CHEMISTRY MODEL TEST PAPER:

http://www.amarujala.com/result/cbseboard/ModelPapers%5CMODELPAPER10%5C12th_Chemistry_2010.asp

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http://www.amarujala.com/result/cbseboard/ModelPapers%5CModelPaper10%5CBusiness_Study_XII_2010.asp

PHYSICS MODEL TEST PAPER:

http://www.amarujala.com/result/cbseboard/ModelPapers%5CMODELPAPER10%5Cphysics12.pdf

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Part A

(Not for Profit Organizations, Partnership Firms and Company Accounts)

1. Distinguish between Income and Expenditure Account and Receipt and Payment Account on the basis of nature of items recorded therein.

2. Ram and Mohan are partners in a firm without any partnership deed. Their capitals are Ram Rs. 8,00,000 and Mohan Rs. 6,00,000. Ram is an active partner and looks after the business. Ram wants that profit should be shared in proportion of capitals. State with reason whether his claim is valid or not.

3. Define goodwill.

4. State any two reasons for the preparation of ‘Revolution Account’ on the admission of a partner.

5. Give the meaning of ‘minimum subscription’.

6. Calculate the amount of sports material to be debited to the Income and Expenditure Account of Capital Sports Club for the year ended 31.3.2007 on the basis of the following information:

7. Samta Ltd. forfeited 800 equity shares of Rs. 100 each for the non-payment of first call of Rs. 30 per share. The final call of Rs. 20 per share was not yet made. Out of the forfeited shares 400 were re-issued at the rate of Rs. 105 per share fully paid up.

Pass necessary journal entries in the books of Samta Ltd. for the above transactions.

8. Deepak Ltd. purchased furniture Rs. 2,20,000 from M/s Furniture Mart. 50% of the amount was paid to Furniture Mart by accepting a bill of exchange and for the balance the company issued 9% debentures of Rs. 100 each at a premium of 10% in favour of Furniture Mart.

Pass necessary journal entries in the books of Deepak Ltd. for the above transactions.

9. Kumar and Raja were partners in a firm sharing profits in the ratio of 7 : 3. Their fixed capitals were : Kumar Rs. 9,00,000 and Raja Rs. 4,00,000. The partnership deed provided for the following but the profit for the year was distributed without providing for :

(i) Interest on capital @ 9% per annum.

(ii) Kumar’s salary Rs. 50,000 per year and Raja’s salary Rs. 3,000 per month.

The profit for the year ended 31.3.2007 was Rs. 2,78,000.

Pass the adjustment entry.

10. P, Q and R were partners in a firm sharing profits in 2 : 2 : 1 ratio. The firm closes its books on 31 March every year. P died three months after the last accounts were prepared. On that date the goodwill of the firm was valued at Rs. 90,000. On the death of a partner his share of profit in the year of death was to be calculated on the basis of the average profits of the last four years. The profits of last four years were :

Year ended 31.3.2007 Rs. 2,00,000

Year ended 31.3.2006 Rs. 1,80,000

Year ended 31.3.2005 Rs. 2,10,000

Year ended 31.3.2004 Rs. 1,70,000 (Loss)

Pass necessary journal entries for the treatment of goodwill and P’s share of profit on his death. Show clearly the calculation of P’s share of profit.

11. Sagar Ltd. was registered with an authorised capital of Rs. 1,00,00,000 divided into 1,00,000 equity shares of Rs. 100 each. The company offered for public subscription 60,000 equity shares. Applications for 56,000 shares were received and allotment was made to all the applicants. All the calls were made and were duly received except the second and final call of Rs. 20 per share on 700 shares. Prepare the Balance Sheet of the company showing the different types of share capital.

12. Following is the Receipt and payment Account of Indian Sports Club for the year ended 31.12.2006 :

Other Information :

On 31.12.2006 subscription outstanding was Rs. 2,000 and on 31.12.2005 subscription outstanding was Rs. 3,000. Salary outstanding on 31.12.2006 was Rs. 1,500.

On 1.1.2006 the club had building Rs. 75,000, furniture Rs. 18,000, 12% investment Rs. 30,000 and sports equipment Rs. 30,000. Depreciation charged on these items including purchases was 10%.

Prepare Income and Expenditure Account of the Club for the year ended 31.12.2006 and ascertain the Capital Fund on 31.12.2005.

13. K and Y were partners in a firm sharing profits in 3 : 2 ratio. They admitted Z as a new partner for 1/3^rd share in the profits of the firm. Z acquired his share from K and Y in 2 : 3 ratio. Z brought Rs. 80,000 for his capital and Rs. 30,000 for his 1/3^rd share as premium. Calculate the new profit sharing ratio of K, Y and Z and pass necessary journal entries for the above transactions in the books of the firm.

14. Pass necessary journal entries in the books of Varun Ltd. for the following transactions :

(i) Issued 58,000, 9% debentures of Rs. 1,000 each at a premium of 10%.

(ii) Converted 350, 9% debentures of Rs. 100 each into equity shares of Rs. 10 each issued at a premium of 25%.

(iii) Redeemed 450, 9% debentures of Rs. 100 each by draw of lots.

15. R,, S and T were partners in a firm sharing profits in 2 : 2 : 1 ratio. On 1.4.2004 their Balance Sheet was as follows :

S retired from the firm on 1.4.2004 and his share was ascertained on the revaluation of assets as follows :

Stock Rs. 40,000; Furniture Rs. 6,000; Plant and Machinery Rs. 18,000; Building Rs. 40,000; Rs. 1,700 were to be provided for doubtful debts. The goodwill of the firm was valued at Rs. 12,000.

S was to be paid Rs. 18,080 in cash on retirement and the balance in three equal yearly installments.

Prepare Revaluation Account, Partner’s Capital Accounts, S’s Loan Account and Balance Sheet on 1.4.2004.

OR

DD and E were partners in a firm sharing profits in 3 : 1 ratio. On 1.4.2007 they admitted F as a new partner for 1/4^th share in the firm which he acquired from D. Their Balance Sheet on that date was as follows :

F will bring Rs. 40,000 as his capital and the other terms agreed upon were :

(i) Goodwill of the firm was valued at Rs. 24,000.

(ii) Land and Building were valued at Rs. 70,000.

(iii) Provision for bad debts was found to be in excess by Rs. 800.

(iv) A liability for Rs. 2,000 included in sundry creditors was not likely to arise.

(v) The capital of the partners be adjusted on the basis of F’s contribution of capital to the firm.

(vi) Excess or shortfall, if any, to be transferred to current accounts.

Prepare Revaluation Account, Partner’s Capital Accounts and the Balance Sheet of the new firm.

16. Janata Ltd. invited applications for issuing 70,000 equity shares of Rs. 10 each at a premium of Rs. 2 per share. The amount was payable as follows :

On application Rs. 4 per share (including premium)

On allotment Rs. 3 per share

On first and final call – Balance.

Applications for 1,00,000 shares were received. Applications for 10,000 shares were rejected. Shares were allotted to the remaining applicants on pro-rata basis. Excess money received with applications were adjusted towards sums due on allotment. All calls were made and were duly received except first and final call on 700 shares allotted to Kanwar. His shares were forfeited. The forfeited shares were re-issued for Rs. 77,000 fully paid up.

Pass necessary journal entries in the books of the company for the above transactions.

OR

Shubham Ltd. invited applications for the allotment of 80,000 equity shares of Rs. 10 each at discount of 10%. The amount was payable as follows :

On application Rs. 2 per share

On allotment Rs. 3 per share

On first and final call – Balance.

Applications for 1,10,000 shares were received. Applications for 10,000 shares were rejected. Shares were allotted on pro-rata basis to the remaining applicants. Excess application money received on application was adjusted towards sums due on allotment. All calls were made and were duly received. Manoj who had applied for 2000 shares failed to pay the allotment and first and final call. His shares were forfeited. The forfeited shares were re-issued for Rs. 24,000 fully paid up.

Pass necessary journal entries in the books of the company for the above transactions.

Part B

(Analysis of Financial Statements)

17. The stock turnover ratio of a company is 3 times. State, giving reason, whether the ratio improves, declines or does not change because of increase in the value of closing stock by Rs. 5,000.

18. State whether the payment of cash to creditors will result in inflow, outflow or no flow of cash.

19. Dividend paid by a manufacturing company is classified under which kind of activity while preparing cash flow statement?

20. Show the major headings on the liabilities side of the Balance Sheet of a company as per Schedule VI Part I of the Companies Act, 1956.

21. From the following information prepare a Comparative Income Statement of Victor Ltd. :

22. From the following information calculate any two of the following ratios :

(i) Net Profit Ratio

(ii) Debt-Equity Ratio

(iii) Quick Ratio

Information :

Closing Stock – 20% more than opening stock.

23. From the following Balance Sheets of Som Ltd. as on 31.3.2006 and 31.3.2007 prepare a Cash Flow Statement :

During the year a machine costing Rs. 70,000 was sold for Rs. 15,000. Dividend paid Rs. 24,000.

Part C

(Computerised Accountancy)

24. What are the subsystems (types) in the Computerised Accounting System ?

25. Explain the concept of Data Definition Language (DDL).

26. Differentiate between Database and File.

27. What are the limitations of the computerised accounting system ?

28. What are the disadvantages of DBMS ?

29. Write the formulae for a spreadsheet to compute the depreciation and written down value of assets. The following are the rates of depreciation :

Plant and Machinery : 20%; Computers : 35%; Furniture : 25%; Motor vehicles : 20%. Round off calculations to the nearest rupee.

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2. Define the term ‘order of reaction’ for chemical reactions.

3. What causes Brownian movement in a colloidal solution ?

4. In which one of the two structures, NO₂⁺ and NO₂^-, the bond angle has a higher value ?

5. Write the IUPAC name of the following compound:

6. Arrange the following compounds in an increasing order of their acid strengths:

(CH₃)₂CHCOOH, CH₃CH₂CH(Br) COOH, CH₃CH(Br)CH₂COOH

7. Write a chemical reaction in which the iodide ion replaces the diazonium group in a diazonium salt.

8. Name a substance that can be used as an antiseptic as well as a disinfectant.

9. Explain as to why haloarenes are much less reactive than haloalkanes towards nucleophilic substitution reactions.

OR

Which compound in each of the following pairs will react faster in S_N2 reaction with -OH ? Why ?

(i) CH₃Br or CH₃I

(ii) (CH₃)₃CC1 or CH₃C1

10. (a) State the IUPAC name of the following compound:

(b) Complete the following chemical equation:

CH₃CH₂CH=CH₂ + HBr –> (Presence of Peroxide)

11. State Henry’s law correlating the pressure of a gas and its solubility in a solvent and mention two applications for the law.

12. A first order decomposition reaction takes 40 minutes for 30% decomposition. Calculate its t_½ value.

13. What is meant by the ‘rate constant, k’ of a reaction ? If the concentration be expressed in mol L^-1 units and time in seconds, what would be the units for k (i) for a zero order reaction and (ii) for a first order reaction ?

14. Define the following terms in relation to proteins:

(i) Peptide linkage

(ii) Denaturation

15. List the reactions of glucose which cannot be explained by its open chain structure.

16. Assign a reason for each of the following statements:

(i) Ammonia is a stronger base than phosphine.

(ii) Sulphur in vapour state exhibits a paramagnetic behaviour.

17. Draw the structures of the following molecules:

(i) SF₄

(ii) XcF₄

18. What are biodegradable and non-biodegradable detergents ? Give one example of each class.

19. What is a semiconductor ? Describe the two main types of semiconductors and explain mechanisms for their conduction.

20. Calculate the temperature at which a solution containing 54 g of glucose, (C₆H₁₂O₆), in 250 g of water will freeze.

(K_f for water = 1.86 K mol^-1 kg)

21. What are lyophilic and lyophobic sols ? Give one example of each type. Which one of these two types of sols is easily coagulated and why ?

22. State briefly the principles which serve as basis for the following operations in metallurgy:

(i) Froth floatation process

(ii) Zone refining

(iii) Refining by liquation

23. Write chemical equations for the following processes:

(i) Chlorine reacts with a hot concentrated solution of sodium hydroxide

(ii) Orthophosphorous acid is heated

(iii) PtF₆ and xenon are mixed together

OR

Complete the following chemical equations:

(i) Ca3P2 (s) + H2O (l) –>

(ii) Cu₂+ (aq) + NH₂ (aq) –>

(iii) F2 (g) + H2O (l) –>

24. (a) What is a ligand ? Give an example of a bidentate ligand.

(b) Explain as to how the two complexes of nickel, [Ni(CN)₄]^2- and Ni(CO)₄, have different structures but do not differ in their magnetic behaviour.
(Ni = 28)

25. Name the reagents which are used in the following conversions:

(i) A primary alcohol to an aldehyde

(ii) Butan-2-one to butan-2-ol

(iii) Phenol to 2, 4, 6-tribromophenol

26. Account for the following observations:

(i) pK_b for aniline is more than that for methylamine.

(ii) Methylamine solution in water reacts with ferric chloride solution to give a precipitate of ferric hydroxide.

(iii) Aniline does not undergo Friedel-Crafts reaction.

27. Write the names and structures of the monomers of the following polymers:

(i) Buna-S

(ii) Neoprene

(iii) Nylon-6

28. Conductivity of 0.00241M acetic acid solution is 7.896 × 10^-5 S cm^-1. Calculate its molar conductivity in this solution. If Λ_m⁰ for acetic acid be 390.5 S cm²mol^-1, what would be its dissociation constant ?

OR

Three electrolytic cells A, B and C containing solutions of zinc sulphate, silver nitrate and copper sulphate, respectively are connected in series. A steady current of 1.5 ampere was passed through them until 1.45 g of silver were deposited at the cathode of cell B. How long did the current flow ? What mass of copper and what mass of zinc were deposited in the concerned cells ? (Atomic masses of Ag = 108, Zn = 65.4, Cu = 63.5)

29. Assign reasons for the following:

(i) The enthalpies of atomisation of transition elements are high.

(ii) The transition metals and many of their compounds act as good catalyst.

(iii) From element to element the actinoid contraction is greater than the lanthanoid contraction.

(iv) The E⁰ value for the Mn³⁺/Mn²⁺ couple is much more positive than that for Cr³⁺/Cr²⁺.

(v) Scandium (Z = 21) does not exhibit variable oxidation states and yet it is regarded as a transition element.

OR

(a) What may be the possible oxidation states of the transition metals with the following d electronic configurations in the ground state of their atoms:

3d³4s². 3d⁵4s² and 3d⁶4s². Indicate relative stability of oxidation states in each case.

(b) Write steps involved in the preparation of (i) Na₂CrO₄ from chromite ore and (ii) K₂MnO₄ from pyrolusite ore.

30.

(a) Complete the following reaction statements by giving the missing starting material, reagent or product as required:

(b) Describe the following reactions:

(i) Cannizaro reaction

(ii) Cross aldol condensation

OR

(a) How would you account for the following:

(i) Aldehydes are more reactive than ketones towards nucleophiles.

(ii) The boiling points of aldehydes and ketones are lower than of the corresponding acids.

(iii) The aldehydes and ketones undergo a number of addition reactions.

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1. A potted plant otherwise kept in sunlight, is shifted to monochromatic red light (wave length 700nm). Will the rate of photosynthesis increase, decrease or remain the same? (1 mark)

2. Name two non-iron products of the breakdown of haemoglobin. (1 mark)

3. Flowers that bloom at night are usually small and white but give out a strong scent. Why do they do so ? (1 mark)

4. Rearrange the following levels in their correct organisational sequence : Landscape, Organism, Community, Population Ecosystem, Biosphere. (1 mark)

5. During a meristem culture some explants were kept in culture medium containing more of auxins than cytokinins. Which organ of the plant is expected to differentiate from the callus? (1 mark)

SECTION-B

6. Name the enzyme that catalyses carboxylation as well as oxygenation reaction. In which cell organelle, is this enzyme found and in what way, is that organelle different in the mesophyll and bundle sheath cells? (2 marks)

7. How do the potassium, chloride and malate ions help in opening the stomata ? (2 marks)

8. Two green potted plants were kept separately inside oxygen free bell jars, one in sunlight and the other in dark. Which of the two plants will survive for longer period and why? (2 marks)

9. A student unknowingly crushed a cockroach under his shoes. Finding that no red fluid comparable to vertebrate blood came out, he was curious to know whether the cockroaches are at any disadvantage. How will you satisfy his curiosity? (2 marks)

10. Show by a series of diagrams the manner of regeneration in a hydra if it is cut into two pieces transversely at the middle. (2 marks)

OR

Show by a series of diagrams the manner of transverse binary fission in Planaria. ( 2 marks)

11. In extreme summer and winter, certain animals like frogs and lizards abandon active life. This is popularity called summer sleep and winter sleep respectively. (2 marks)

(i) What are the technical terms for summer sleep and winter sleep?

(ii) State any two changes in the body that occur during the above-mentioned dormant states.

12. State the relationship between biotic potential and environmental resistance. (2 marks)

13. Define parthenogenesis. Give one example of parthenogenesis from plants and one from animals. (2 marks)

14.What is meant by active immunity and passive immunity? (2 marks)

15. A person was born without thymus gland but otherwise normal. Mention any four ways in which the person is likely to suffer due to its absence. (2 marks)

SECTION-C

16. Mr. ‘X’ hardly fell sick when young. As he aged and grew older he started contracting many infectious diseases. (3 marks)

(i) Name the theory of ageing which explains the above mentioned change.

(ii)What causes susceptibility to infections in old age?

17. How many pairs of ribs are found in the humans? How do you categorise these on the basis of their attachment ? Explain. (3 marks)

18. Stomach is the right place in the alimentary canal where hydrochloric acid is secreted in the gastric juice. Describe any three points to justify this statement. (3 marks)

19. Suppose for some reason ATP falls deficient in a nerve fibre, how will it affect the conduction of nerve impulse through it? (3 marks)

20. Giving an example of CAM plants, explain the process of Crassulacean Acid Metabolism. What is its advantage? (3 marks)

OR

Starting from Glycolate produced in the chloroplast, explain the various steps of photorespiratory pathway that take place in the two other organelles up to the formation of PGA back in the chloroplast. (3 marks)

21. Differentiate between morula and blastocyst as stages in human embryonic development. Which of these stages gets implanted in the uterine wall and about how many days after fertilization? (3 marks)

22. Name the three major Biomes and state the kind of climax vegetation found in each of them. (3 marks)

23. Name and define the environment-related terms for the following: (3 marks)

(i) Pertaining to the fact that DDT accumulated in a three step food chain will be maximum in the secondary consumer.

(ii) Pertaining to causing algal bloom.

24. List and briefly describe any three diagnostic techniques by images based on the use of ‘X’-rays. (3 marks)

25. In regard to transplant of organs, what are isograft, allograft and xenograft? (3 marks)

SECTION-D

26. Name any two C4 plants. Specify how the C4 photosynthetic pathway increases C02 concentration in bundle sheath cells of such plants and explain what is the need of increasing C02 concentration. (5 marks)

OR

(a) Name two organisms whose symbiotic association leads to nitrogen fixation in root nodules. (2 marks)

(b) Describe the steps in the formation of root nodules and name the two plant harmones that promote cell division for nodule formation. Which two physiological processes provide the FAD and ATP required for fixation of atmospheric nitrogen? (3 marks)

27. Decribe the structure of immunoglobin or Ig/antibody. Draw a diagram show­ing the formation of antigen-antibody complex and label the parts. (5 marks)

OR

(a) Define the following : (3 marks)

(i) a protoplast

(ii) a somatic hybrid

(iii) an allopolyploid

(b) With the help of diagrams, describe the formation of a somatic hybrid cell. (2 marks)

28. Differentiate between osmoregulators and osmoconformers. How will you categorise humans, hagfish, and camel under these categories? Mention any four points how camel regulates the water content of its body. (5 marks)

OR

Trace the events in a muscle fibre from the time it receives the impulse through the neuromuscular junction up to the contractile response. (5 marks)

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