Sri Kumaran Subject: General Science Children's Home Marks: 80 Time: 3 Hrs SE | Malasandra Date: 19.02.2025 Class:9 ANNUAL EXAMINATION {2024-25} - SET 2 This question paper consists of 33 questions in 5 sections. All questions are compulsory. However, an internal choice is provided in some questions. A student is expected to attempt only one of these questions. Section A consists of 10 objective type questions carrying 01 mark each Section B consists of 8 Very Short questions carrying 02 marks each. Answers to these questions should be in the range of 30 to 50 words. Section C consists of 9 Short Answer type questions carrying 03 marks each. Answers to these questions should be in the range of 50 to 80 words, > Section D consists of 3 Long Answer type questions carrying 0 marks each. Answer to these. questions should be in the range of 80 to 120 words. > Section E consists of 3 source-based/case-based units of assessment of 04 marks each with sub-pans, SECTION -A |. Answer the following question: tx10=10) \A body is thrown vertically upwards with a velocity'u. The maximum height it reaches is given by a u w u = | ol ire d) — 25 26 28 8 id floats with 36% of its volume above water. The density of the solid is 36 g/cc b) 0.18 g/ec 0.72 glee d)0. 64 g/cc 3) Observe the given flow chart and choose the correct option, 7 i R [@ 2 Stee 5g ANE, Seattens bi We eet = a ® ai eo BS ** cee tame ee | ee 2 | > [Cotoid [Colloid [Solution socom ysl cates |? | | no c | Colloid Suspension | Solution | 4 | Suspension | Suspension Solution | ar. @ v + Searters Lil” om sare tet SET2 - Page of?4) The molecular mass of a compound "X” which is formed between ‘A’ and ‘B’is 62u. The ms of Bin the compound is 16u. The formula of \'is [A - 23u B- 16u} a) AB b)AB: OAB AB 5) Atissue is present in the flesh of coconut while tissue ‘Q’is present in the shell of cocony Identify the correct option with respect to P’ and ‘Q” a) Tissue has living cells while tissue ‘Q’ has dead cells 'b) Cell wall of "is thick while cell wall of is thin, ©) Cell wall of is rigid and cell wall of Q's flexible. ¢) Both tissues >’ and ‘Q’ have living cells with thin cell wall, 6) Based on the table given below choose the correct option : ‘Type of cell | Cell wall | Cell membrane | Mitochondria Nucleus | x [wo | Yes Yes Ty Yes | Yes No No Cc = No Yes No No a) X- plant cell, Y- prokaryote, Z- animal cell ) X- animal, Y- prokaryote, Z- mature RBC ©) X~bacteria, ¥- plant cell, Z- animal cell d) X= plant cell, Y- mature RBC, Z- animal cell d B are two biomolecules synthesised by X an V respectively. entify, 8, Xena | a) A. protein, B- lipid, X- Smooth Endoplasmic reticulum, ¥-Mitochoneria b) A-lipid, B- protein, X- Smooth Endoplasmic reticulum, |; f Y- Mitochondria Ul i ©) Ar lipid, 8 protein, x ribosome, ¥- Smooth Endoplasmic I ) reticulum 4) Ac lipid, 8 - protein, x- Smooth Endoplasmic reticulum, ¥. ribosome > The following questions (@ - 10 ) has two statements ~ Assertion (A) and Reason (R). Answerit by selecting an appropriate option given below. (2) Both (A) and (R) are true anc (R) is the correct explanation of (a) (©) Both (A) and (R) are true and (R) is the not correct explanation of (A) (6) (AYis true but (Rp is false (@)(A)is false but (R) is true sera -page2 at?assertion (A) : Work done is positive while compressing a spring, Reason (R)_: Aspring possesses elastic potential energy. Assertion (A): The formula of Carbon di sulphide Is CS2. Reason (R)_: The valency of Carbon and Sulphur is 4 and 2 respectively. ) Assertion (A) : All epithelial tissues have an extracellular fibrous basement membrane. Reason (R) Epithelial tissues are not connected to capillaries. SECTION -B [2x8=16] ) 2) Arunner pushes the ground with his feet before he starts his run. Identify one action - reaction pair. @two balls of mass m’ and ‘2m’ have equal momentum. If they are brought to rest by applying equal forces , ind the ratio of time taken by them to come to rest. Give reason. 12) a) State Archimedes principle, ') A balloon filed with hydrogen gas floats in air. Why? ) The table given below shows 8 part of the exercise routine of Ramon 2 slipway and a ladder. sas ich day's masimurn work done? Wt by On which day is the maximum power developed? wot a roe tnetlens ua Climbs the ledder 8 a2 uns along the sioy 6 Day climbs tender 5 baa) ‘uns along the slipway 0 ta) Corbon and ongen combine na fed ratio BY ass 9 form CO», (C-12u, 0-164) ule of ratio by mass in which carbon and oxyEen combine to form a molec 3) Whatisth c0:? 6 wat tert by ass in ch avon combing sith oxygen to form 33 g of CO:? ination that holds good in the above C252 L cy State the law of chemical of com ser2 -Page3ol15) A mixture of alcohol and water was kept at room temp data of the experiment was plotted as in the graph given oo gs metas) os BRSSEER a) Name the process that occurs between first week and the final week. ()How does the behaviour of the particles of the substances impact the rate of the process identified by you? ] What type of solution is formed between alcohol and water in the last week? 16) How does composite fish culture fulfil the aims of sustainable agriculture? 17) Write any four desirable characters of bee varieties suitable for honey production? 18) Parenchyma cells show difference in structure based on their location and function. Justify by giving two examples, SECTION -c [39-27] 19) a) () Write the observation of the gold foil experiment which lead to by Rutherford (i) Write 2 postulates of Rutherford's nuclear model of an atom, 'b) Write the limitation of Rutherford’s Atomic model the discovery of nucleus 20) 2) Write the formula for the following compounds () Sodium hydroxide (i Calcium Nitrate (ii) Potassium lodide (iv) Aluminium Phosphate ») Identify the ions present in Barium Sulphate 21) Using the hints given below identity the elements Anelement 2) With 4 electrons in the second shell b) Which forms divalent cation having 12 neutrons ? {Which is a metalloid vith covalency 4 4) Which is a successor ofan element with ¢) Having 1 proton and 1 electron th aromiciy of atomic number 9, SET2 - page 40f722) Diversified farms are usually more economically and ecologically resilient. By growing @ armers lower the economic risk and ensure better soil health, riety of crops, ied farms ensure better soil health? a) How do diversi b) How do diversified farms decrease the economic burden of farmers? (2 points) Diagrammatically compare and contrast between columnar and cuboidal epithelium, 1) Observe the diagram and answer the given questions a) Identify X’ and b) How does’2’help in photosynthesis? ©) (i) This organelle has the ability to divide even when ide the cell under laboratory conditions. Give reason. (il) Give an example of another such organelle. 25) Velocity-Time graph for motion of car A and car B is as shown in the graph. 4) Sketch the shape of a d-t graph for car A. 'b) What is the change in the velocity of the car B over the last 1.5 hrs? ©) Calculate the distance travelled by car B in the first 1.Shrs. 26) a) A motor car of mass 1200kg is moving along, a straight line with a uniform velocity of 117km/h. After 4s velocity of a car slows down to 72km/h, Calculate the force acting on the body. b) Wearing seatbelts prevent injury in a car during sudden deceleration. Why? 27) Observe the graph of a sound wave ‘A’ in a medium, .ed of the sound wave in a medium if the time period is 2 x 10? . a) Calculate the sper eed of the by Ifthe time period of another sound wave’ is 4x 10s then, how will the sp wave change? ("Sound absorbent materials are used in an auditorium". Give reason.SECTION -D Bias 28) Malox is an antacid which is used to neutralize acidity in the stomach during indigestion, Itcontains a mixture of hydroxides of aluminium and magnesium. (Al~ 27u, Mg-24u, H-tu, O- 16u) ) Write the formula of both the hydroxides. b) Calculate the molecular mass of Magnesium hydroxide. [calculation should be shown) (Write the simplest ratio when magnesium reacts with sulphur in the ratio by mass of 3: 4 4) Define polyatomic radical €) Write the formula of the compound when Sulphate combines with polyatomic cation, f) Name the type of compound, formed in (e)? 23) A farmer was aiming to achieve high yield of a fodder crop in a particular season. He aims to increase his yield by improving the nitrogen content in the Sol. 8a) Suggest two ways by which he can incorporate desirable agronomic trait in his crop. 'b) What do you understand by the term agronomic trait? ©) Write any one desirable agronomic trat in fodder crop. Why is it desirable? 0) Suggest a way by which the farmer-can increase the nitrogen content in the soil without Using chemical fertilizers ©) Suggest @ way by which this farmer can increase his income and protect himself from total Top failure. Give reason for your answer. 30) A body floating in four different liquids A,B,C and D as shown, 2) Arrange the densities ofthe liquid in descending order. ) Which liquid exerts maximum upthrust and why? ) The mass of the body is 75kg, when complet ly immersed in water it displaces 1500 cm? of water. Find its relative density and apparent it weight in water. SECTION-E (4x3=12) 25 shown. A person of A nat A? Sa B she loses 408 of her 8 aon" Fenergy violated at B? Give reason, sera -Page6ot?collagen - The current rage” Collagen is a protein extensively used in cosmetics; can be administered orally, applied as a cream. It is an important constituent of connective tissue that acts as a glue that holds all other tissues together. Connective tissue has the important function of ensuring that ‘our body systems work in harmony. The relative amount and arrangement of collagen, elastin and reticular fibres determine the type of connective tissues found in the body. \) Why is collagen extensively used in cosmetics? ») lymph is a connective tissue that lacks collagen. Why is it called as a connective tissue? }) Name two connective tissues that primarily contain large number of these fibres. Correlate between the structure and function of any one of them. Oxygen is one of the important keys in understanding climate change. It exists as “light” oxygen -16 and “heavy" oxygen -18. The ratio of these two types of oxygen in water changes with climate. Evaporation and condensation are types of processes that influence the formation Ha'“0 and He"90 in oceans. Water containing light oxygen evaporates slightly more readily than water molecules containing heavy oxygen. At the same time water vapor molecules containing heavy oxygen condenses more readily than water containing light oxygen. [0 - 16u} @) How do we commonly know light and heavy oxygen? 5) Calculate the molecular mass of light and heavy oxygen, © Water containing '*0 readily condenses than water contait ing "0, why? ©) Water containing light and heavy oxygen has the same molecular formula. Give reason. 5 at ao by mass does ight oxygen combine wth hydrogen fo form a ole of wate *** Good Luck****