10 STD COMMON QUARTERLY SCIENCE SEPTEMBER-2018 ANSWER KEY Q.NO KEY ANSWERS வ ட க க ற ப ப கள MARKS 6C 13, 7 N 14 வ.எண வ ட க க ற ப ப கள மத ப ப ண கள
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1 PART-A 0 STD COMMON QUARTERLY SCIENCE SEPTEMBER-08 ANSWER KEY Q.NO KEY ANSWERS வ ட க க ற ப ப கள MARKS b) beta ப ட ட d) BCG BCG 3 B) Grass ப ல 4 b) Thymus த மஸ 5 b) Pachytene ப க க ட ன 6 c) Gigantism ம தகய ன வளர ச ச 7 b) Isotones ஐசச சட ன கள 8 H, H Isotopes 6 C 3, 7 N 4 Isotones H, H ஐசச சட ப ப கள 6C 3, 7 N 4 ஐசச சட ன கள 9 Decomposition reaction ச த வ ற ல வ தன 0 c) 3 3 a)9.467x0 5 m 9.467X0 5 m Tiger ப ல 3 b) Liquid helium ரவ ஹ ல யம 4 c) Voltmeter சவ ல ட ம ட டர 5 b) ammonia அம சம ன ய PART-B வ.எண வ ட க க ற ப ப கள மத ப ப ண கள 6 7 Variation may be defined as differences in the characteristics among the individuals of the same species. Types: Somatic Variation, Germinal Variation ஒசர ச ற ற னத த ச ச ர ந உய ர னங கள க க தடசயய ன பண ப கள ன ம ற ப ட கள சவற ப ட கள எனப பட ம. வதககள :.உடல சசல ம ற ப ட.இனச சசல ம ற ப ட a) A- correct R-correct அ) க ற ற -சர க ரணம - சர B.KANNAN M.Sc., B.Ed., PH: kannanphy007@gmail.com
2 Vaccine Microbes Natural Gas Fuel Citric acid Organic acid Monoclonal antibodies Medicine Vitamins - Metabolism ட ப ப மர ந த - ந ண ண ய ர இயற தக வ ய - எர சப ர ள ச ட ர க அம லம - கர ம அம லம ம சன க சள னல எ ர ப ப ப சப ர ள - மர ந த கள தவட டம ன கள - வளர ச த ம ற றம Contaminated objects such as handkerchief, bedding,utensils,toilet articles are called fomites. ச ய ற றவர ன உதடதமகள எ.க : தகக க ட தட, பட க தக,ப த ரங கள,கழ வதறப சப ர ட கள Night Blindness It is caused due to deficiency of Vitamin A It does not pass from one generation to another ம ட க கண தவட டம ன A க தறப ப ட ட ச ய அட த தலம தறகள க க கடத த. Symptoms of AIDS Significant weight loss Chronic diarrhea Prolonged fever Opportunistic infections such as tuberculosis AIDS நந ய ன அற க ற கள எதடக க தறவ கட ம சப ச டர க ய ச சல க சச ய Amoebic dysentery Entamoeba histolytica Typoid Salmonnella typhi Colour Blindness It is caused due to defective (or) mutated genes. It is a genetic disorder can pass from one generation to another ந றக க ர ட மரப யல ச ய அட த தலம தறகள க க கடத த ம. B.KANNAN M.Sc., B.Ed., PH: kannanphy007@gmail.com
3 அம ப க ச த சப எண டம ப ஹ ஸ சட தலட க. தடப ப ய ட ச ல சம னல ல தடஃப ப Draw the given diagram and label its parts சக ட க கப பட ட படத தன வதரந த ப ங கதள க ற க கவ ம The dorsal portion of the mid brain consists of four hemispherical bodies called corpora quadrigemina. Functions: Controls and regulates visual reflexes and optical orientation. ட ம தளய ன ம த க ப ப றத ல ள ள ன க அதரவட டக சக ளங கள க க க ர சப ர க வ ட ர ச ம ன என ற சபயர பண கள : ப ர த ல ன அன ச தச சசயல, ப ர தவ ச ர ப யக க கட ட ப ட a) Thyroxine b) Adrenaline and noradrenaline அ) த ர க ஸ ன ஆ) அட ர னல ன, ர அட ர னல ன The process of fusion of a male gamete with an egg and the other gamete with a secondary nucleus is known as double fertilization. இரண ட ஆண சகம ட ட கள ல ஒன ற அண டத த டன ம மற சற ன ற இரண ட ம தல உட கர வ டன இதண ல The fusion of this nucleus with the second male gamete is known as triple fusion. இர தமய உட கர வ டன ஒர ஆண சகம ட இதணவத Autochory Anemochory Hydrochory Zoochory - Balsam - Tridax - Lotus - Xanthium ஆட சட சக ர - ப ல சம அன சம சக ர - ட தரட க ஸ தஹட சர சக ர - மதர ச சக ர - ஸ ந யம According to the Henry s law, an increase in pressure increases the solubility of gases in liquids. சஹன ற வ ப பட, அழ த அ கர ப ப ர மத ல, வ ய க கள ன கட ய ம தன டமடய அத கர க க றத. Weight percent = = 0 x00 50 = 0% weighhhhht of the solute weighhhhht of the solute+weighhhhht of the solvent = 0 x B.KANNAN M.Sc., B.Ed., PH: kannanphy007@gmail.com 4x/= 4x/=
4 கதரசல ன சசற வ தற ச வ ம = கதரப சப ர ள ன தற = 0 x00 கதரப சப ர ள ன தற+கதரப பன ன தற 0+40 = 0 x00 50 = 0% R does not Explain A ஈ) க ரணம க ற தற வ ளக கவ ல தல C 6 H O 6 = 6(C)+(H)+6(O)= 6()+()+6(6)=7++96=80g HNO 3 = (H)+(N)+3(O) =()+(4)+3(6)=+4+48 = 63g C 6 H O 6 = 6(C)+(H)+6(O)= 6()+()+6(6)=7++96=80க HNO 3 = (H)+(N)+3(O) =()+(4)+3(6)=+4+48 = 63க number of atoms a) Number of moles = b) Number of moles = அ) சம ல கள ன எண ண க தக= ஆ) சம ல கள ன எண ண க தக= a) HCOOH Organic Acid b) Vinegar Acid அ) HCOOH கர ம அம லம ஆ) வ ன கர - அம லம 3 = mole = x x0 mass = 7.95 = 0.5 mole Atomic mass 55.9 அண க கள ன எண ண க தக 6.03x0 3 = x0 3 சப ர ள ன தற அண தற = = சம ல = 0.5 சம ல a) Because, the powdered magnesium offers a large surface area for the reaction to occur at a faster rate. b) Copper sulphate acts a catalyst and speeds up the reaction. அ) த ள க கப பட ட மக ன ச யம - ப றப பரப ப அ கம - வ தன சவகம க தடசபற ம. ஆ) க ப பர சல சபட வ தனய க க - வ தனய ன சவகத த அ கர க க ம a) Small dimensions - Screw gauge b) Large dimensions - Scale c) Long distances - Light year d) Small distances - Kilometer சப ர த த க அ) ச ற ய பர ம ணங கள - ர க அளவ ஆ) சபர ய பர ம ணங கள - அளவ சக ல இ) அ க ச தலவ - ஒள ஆண ட ஈ) ச ற ச தலவ - க சல ம ட டர B.KANNAN M.Sc., B.Ed., PH: kannanphy007@gmail.com 4x/= 4x/= 37 Pitch scale, Head scale x=
5 ப ர க சக ல மற ற ம தலக சக ல x= When the handle of the spanner is long the force required to turn the body is less. Moment of the force = F x d சசயல பட ம வ தசதய க தறக க, எள க பயன பட த ர ப ப த றன = F x d Every object in the universe attracts every other object with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. அண டத ல ள ள ஒவ சவ ர சப ர ள ம மற ற சப ர ள கதள அவற ற ன தறகள ன சபர க கற பலன க க ச ர த கவ ல ம, அவற ற க க தடசயய ள ள ச தலவ ன இர மட க க எ ர த த கவ ல ம அதமந வ தசய டன ஈர க க ம. a) Newton s third law b) Law of conservation of momentum அ) ய ட டன ம ன ற ம வ ஆ) உந அழ வ ன தம வ Mass It is the amount of matter contained in a body Fundamental quantity Remains the same everywhere Unit : kilogram தற எதட It is the gravitational pull acting on the body Derived quantity Varies from place to place Unit : Newton எதட பர ப சப ர ள அளவ பர ப சப ர ள ன ம த அட ப பதட அளவ இடத ற க இடம ம ற த அலக : க சல க ர ம Match a) Potential difference - Volt b) Cureent - Ampere c) Charge - Coloumb d) Resistance - Ohm சசயல பட ம வ தசய ன அளவ வழ அளவ இடத ற க இடம ம ற ம அலக : ய ட டன ஈர ப ப B.KANNAN M.Sc., B.Ed., PH: kannanphy007@gmail.com 4x/=
6 PREPARED BY, சப ர த த க அ) ம ன னழ த சவற ப ட - சவ ல ட ஆ) ம ன சன ட டம - ஆம ப யர இ) ம ன ன ட டம - க ல ம ஈ) ம ன தட - ஓம Lead and Tin 4x/= Low க ர யம, சவள ள யம க தறந E = mc E = x(3x0 8 ) E = 9x0 6 E = mc J E = x(3x0 8 ) E = 9x0 6 J a) Uses of alternate energy sources b) Planting of trees c) In the industries use of electric filters to remove the pollutants அ) உயரம ன ப தகப சப க க கள அதமத ல ஆ) ப தக வட க கட ட இ) அ க அளவ ல மரங கள வளர த ல ஈ) பயன ப ட ட தன மக கள ச ர க கம ல ல இடத ல பயன பட த த ல B.KANNAN M.Sc., B.Ed., BT ASST IN SCIENCE, GBHSS, PANAPAKKAM VELLORE DT. B.KANNAN M.Sc., B.Ed., PH: kannanphy007@gmail.com
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