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10th Science (Chapter 1-9) CG

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10th Science (Chapter 1-9) CG

Board questions cg enjoy this is imp questions from the paper

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rinkichoudhari90
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Evo.ution Nn EEE Objective Type Questions Q. 1. Choose the correct answer : 1 14, 15, Modern breed of pet dogs is formed as a result of : (CG 2020 Set A) (a) Natural selection (©) Artificial selection (©) Youth selection (@) Work selection. Fore limbs of dogs and sheeps are used to walk, fore limbs of whale to swim and fore limbs of bat is used to fly. These are examples of : (CG 2019 Set B) (a) Analogous organ (b) Homologous organ (©) Vestigial organ (@) None of these. ‘Which of the following are analogous structures: (CG 2019 Set C, 20 Set B) (2) Wings of bat and wings of butterfly (b) Lungs of man and gills of fish (©) Thorns of bougainvillia and fibres of gourd (@ Wings of bat and foot of horse. Darwin’s theory was based on: (CG 2019 Set A, 24 Set A, 20 Set B) (@) The observations of his voyage (©) Cell theory (©) Law of genetics of Mendel (@ None of these, Theory of natural selection was proposed by : (CG2020 Set A) (@) Lamarck (&)Darwin ()Benjamin (4) De Vreese. Alfred Russell Wallace did his study on : (@Butterflies —_(b) Lion (©Dinosaur —(@) Allof these. Kotumsar caves are the habitats of : (2) Crocodile (b)Dolphin fish (©)Blindfish (@) Allof these. Most varieties of paddy are found due to : (CG 2023 Set A) (a) Natural selection (b) Colour selection (©) Work selection @ Artificial selection. ‘Which of the following was not foundin Dinosaur Era: © (CG 2023 SetB) (a) Ginkgo (b) Cockroach (c) Elephant (@Fem. Darwin’s ship name was : (CG 2023 Set C) (@) Beagle (b)Galapagos ——(c) Finch (@ Wales. Darwin studied the bird of Galapagos : (CG 2024 Set B) (@) Sparrow (Finch (© Beagle (@ Ginkgo. Plant of the dinosaur era: (CG 2024 Set C) (@) Rates (b) Ginkgo (¢) Beagle (d) Cactus. . Whose fossils were found in Lametaghat near Jabalpur: (@ Dinosaur (b) Sparrow (©)Elephant @Rat. ‘Teeth of human and teeth of elephant are : (@) Analogous organ (b) Homologous organ (©) Specific organ (@) Vestigial organ. Example of fossil among the following Is : : (@Finch bird (0) Whale Algae (@Dinosaur. ao] Navbodh Pariah Saar are pced. Which 16, tna vegeble Ds, ott a a ween rent bomlog OPE yan Raith ™ a eticens ah prod ae oan Semen (9sCme 31 Seetecand Pen (eure a atin tater cto gona GEO O.20, yaad grt nt pain. ant Ail ao: en wc nay hes cp isan isieparastnan ocinmee Ans LO)2 O24 Pio. te O16 m .2.Makecorectrae: 7 vancanal Toy Sow development (o Anstgoun arco beg eet tein Poze fini & tbeing produced by maura selection ain Th aden tng cnn ih ue ef lac ow Sach acters oars och eg fe ai operon epee arent ; Serle a wens iv 2 Seen Batand wings or Butety (6) Various SP 8 selected by "organisms areknown as A Oe ee ore oo © De atta, Wins ee a rat ee 44. Development of new species in naire tt (Homologous characters ‘Asa. Charro lhe orp {CC rINSeC ref issn wees lows Tm TN 5 Fast development & Theory of tural selection (Darwin $ OniginoeNanaal seston {Wale " roergebes ane © Dewinisn Darwin 1 Vetom erie hav eid fo me mec 8 Sealy of Burery Alfred Rusell Wallace ‘eres Ae ECO, 3. AWS: ( rT. CD 89-0 5. athe etnton of Siena deo (Q.3. Filia he banks: ry ‘het yor ein a ent? Santee erdopmant et soe ais? 3 Fl i th ns which ca undergp seul reproduction amo ans Peincion of dinoenu isd tothe ee nt Set) ieee : egainal innit mown repent cae psi The 2 race in beaks of finch, exhibits the found peor cciees pn cone pee oa oe neces wed 2 an cnn coos ma sie es Rk ee rast hecstrmr pate pesiachemeteng naar = : wtih weet eee ce ne ben lee 4 FECL oi cnnge in organisms nsrtng oe sete cars ofS es re a iO. 6 ir gaat Ot roa cee ame ae po comprare (comsnn seis the atrl bata of Wind fh where he ney of ie beings selection. 5, Inthe development of organisms 6. The process ofadaptin 7. Darwin travelled ona survey expedi tion of different varieties, \ food, reproduction and shelter is fulfilled. Therefore, adapted t ynatarel, rx ‘Sathocapattrnen (Ce2i03 840 aT Senha sme see smear ncn malt Ton bitten a ‘Artic ish differ ftom the brood ofits own species. 2 Da oa agen ea». be a 1 Biden es 2 pan SB x en te ami, (CO Se Regt! Sea eeu "A conumunity of finches of main sand of South America developed inthe eres, Very Short Answer Type Questions Artificial and Natural selection. which developed in variable bata They 'Q. 1. Write three differences between od pitferences between Artificial and Natural selection Fn eee — Natural selection ‘eames ovarable that ches ofone and were sbletounder sual reqroauicn wih To this process, selection is doncby nature finches ofthe other island. itselé Similarly, scien (Scan), thors eos) ther (gotta) al these rginatefomn This classification isimportantin the Ant stem buthave diversified functions. 8. What are fossils? Give example. (CGS, HSAA,BO called oes. Example Dino ‘This selection is importantin Plant smal Kingdom. ; ‘Aas The remains ofthe pre-existing organisms ore kingdom. ‘Characters of own choice are selected. ‘Characters of ovm choice are not selected zi D: =e ange Torr eae * 9, What isthe effect of mnerease in population of buman on che wane in and Wallace ? (CG 2020 Set) other organisms ? (CGSB) rin and Wat ig qin uo wich sl eae EE es Nott cepisnsn ting vos beat et OR rig neve Bes se a ee penn sa tng cee iss Se oat evant nd nS sion a number dato neat ook am form of new species. 22 Navbodn Paria i Q, 10, What wil bape as uncontalied form 7 Comment favour of TOU Am Pay “ans: Food resources ofthe rpanist aise in font orthose npanisns aay are sal be competition and fight between those oF by which sore ors, jh rain, increase sams wl ae whereas some wil emai Duc too OFFS bumber of organisms remain controlled. 7 rm the waco population wil affect the BabA of Qi Hate eco sroeh popu ed a otabitat Scarcity gt nr Uacontoted growth of population may ead e417 aba wil ee wo naturel czaster, ruta conic nd Hah “Gri. Witemames ofplants fund nthe dinosaur 7M ora rE Cl Mans Cyes, Ginkgo, plants cise in dinosaur 7 04 as today they exist. (Q. 13. Write the name of species nt present at het ‘Ans. Human beings and Elephant Orta Write che tame of scientist who proposed theories on the arin of Ea {sms on the bass of thelr study. ‘Ans. Charles Darwin and Aled Russel Wallace 4. Wg cxample- organs? Inu then ty? ing bt be condered tobe ime of dinosaur. 2.15. Whats species Gi crsnae rome a anne rep of ogists which cn undergo sxoal reproduction, ES Like: Terie, Lizard crs ies pone ttn teste nea ‘Q. 16. What can we find out by the study of fossils ? eee ear soa oe re ca Whee wingofbaty Ans. The study of fossils tells us “O. ca hte 1 They were of various ypes andre for many yeas onthe ath ong GNA SH he eye eee area ven ted 1 Theywee ovr pes an eeguiseecdremtmpainstiae as ownage 2 Water wojgeof Beagle darted on 27" Dexeaber 185 ‘was differences along with similarities. 1836 Important observations of Darwin and ended on 2 Octaber eens ng hich ereents mal rlatn betwen Gepasand | Davin sed samples sa wa en present organisms. creams those sane was surprised to se various types of Short Answer Type Questions Soe fe wesi yen of opm! wna we ated oe al aba of opi fe 'Q.1. What are the main points ofthe theory of development of orgsnisis 2 3. He found fs ofaquticorprinson heck ofan Soh Ae (CG 2019 Set A, 23 Set A) : experienced an earthquake in which the ocean level rose :. 5, Beaches surrounded! roneatly3 meters, ns by cliff's rather than plain sandy stretches indicated that slow “Ann The min pins oft theory of evelopment of eraismsare2S OWS and rinse dob Es ores changes on also in a 1. Existence of diversity in organisms. . 1, UE Eeo boar tad at teas thdeseemnia ieee ose! de 2. Fermation of species in the world is bythe species already present Lnueupiteasacenmncmeateas + Various organisms have originated by the same ancestor. ‘Q.2. Writ four main point ofthe role of habitat in the evton of rgaisas 4 Diversities are found in organisms, of wach some diversi ies pass through genera (CG 2024 Set B) tion to generation. ; ‘Ans. 1. Role of habitat is important inthe evolution of organisms 1 organi is ‘5, Every organism possess some specific differences to maintain his existence, dented tobis covenant nant ru 6 In various organisms, advantageous differences possess specifi pace, ES. 2 Hicpaieas ‘not adapted to his habitat then his number will reéuce and wall be- at 1e role ior jevelopment of ie gears thera eden ad napa Ine devctonment fort)“ oe usin isin nba nisms? : ; me himself uceve in that habitat, These changes maybe‘ favour ofhis adaption cc escbe "ans, Selection and adaptation have an important role in the development of orgat-| Should bring change inthe avalblebaitat sccardingto onset isms, because for development: ‘only those organisms are naturally selected which possessall “4 Organism in ahabitat should bring a change nthe availabe resources or shox\S the tiaaive characteristics in itselfto survive. That organisms is selected fr develops! change according tothe avalble resources. « inthe Animal or Plant kingdom. Ss p SALT! ‘Acins, BASES ANI : Objective Type Questions f a ‘ion, more Ce uct Me so en ost best Water + dioxide oe ait ting ct (ests Wate Qsisitedien {@)sat+ Spr donde cts 3 et rng esd amen te ONE oo @xHa () HNO; (CG2017 Seta) 4 ‘pH value of acidic solution is + 7 ( Morethan7 (@None ofthese, ide (Les ta sakina’s stomach, se requires 2 «na brag rin ie (gseenga ats gta a: (CG 2018 Set C22 Set ¢ Recoteepeiminatateeas OBeaten (4) Becomes more than 75. emmetentn ss, ON comssanzse4 Naar of which alt i acide isa (onc () NaSO,, @NHCL ( (co 2017 St) pale of ase salaton is: “aoe ole ta a (CG 2017 Set C19 Set B, 23 SetB) 9. pl vale of muta ston i= ¢ ‘pea Sah Or aa 10, the following, chemical ar is = a sila (@Metiterage | Onion ‘eoveoil (Litmus. in, Neutralization react (a) Acid with acid orate Spe ingen il bene: 12, Seu ln hfe ivi ae: (*) ©) (€) 80, ; | ss Set tn cet holt we We | Beatin ce ered sin " (@Antbiowe (Antacid (Analgesic (d)Antsetic. 15, Iranateral ore base: otra wae g bt (@) Tomato. 16 Street income ef eth: anion (¢) Magnesium phosphate reared (Aluminium phosphate, Aas. 1. (8,2. (0,3. (0, 4. ©), 5. (0,6. (0,7. (9, 8. @), 9. (10. @), U1. (0, 12.0, 13. (0), 14.0), 15. (9, 16.60 be. I Selene (C.G,) : Case X25 0.2. Make correct pairs: 0 - v 1. Newt station (2), Sodium hytroxide 2. ‘Strong acd (C2019 Set A) () CaCO, 3. Substance of basic nature ( cHCOOH 4. Weak acid @ Ha 5. Egg shell is made up of (@) War 6 Common salt (9) Sodium chloride (CG 2018 Set A) 7. Strong base (CG 2019 Set ©) (®) Nao 8 Calcium hydeoxide(CG 2020'SetB) —_(h) Weak base 9. Ammonia (CG2020 Set) () Lewis tase 10, Natural Indicator @ Umma IL, NHOH (CG2024 Seta) () Weakcbase. ‘Ans. 1. (€),2.(€), 3. (2), 4. (©), 5-(0),6.(9, 7. (8. (8), 9), 10. Gy 1 oO « a 1. Tanaricacid (@) Cloveoil (CG 2022 Set B) 2 Male acid (©) Methylocange (CG 2023 Set A) 3. Acetic acid (©) Washing soda 4. Onalicacid (@ Antacid 5. Calcium hydroxide (©) Limewater 6 Sodium bicarbonate (Tomato (€G2023 setB) 7. Magnesium hydroxide (CG 2024 Set ©) (g) Vinegar 8 Sodium carbonate () Apple 9. Chemical indicator @ Tamarind = (CG2023 Set) 10. Otfactory indicator ©) Bakingsoda 11. Lemon @) Citicacid (CG 2022 Set A) 12, Red rose © Indicator (CG 2022 Set) 13. Niticacid (CG 2024 Set B) (a) Anenivs 14. Ionization (@) Stoagacid 15. pl{Scale (0). Sorensen. ) Ans. 1. (D, 20,3. ®) 4. (0,5. ©). 6.0.7. @, 8 13.@), 14. (a), 15.0. Q.3.Fillin the Blank 1, By wv the hydrogen (Hon concentration ofa dilute solution i represented on (©,9.) 10.) 1. (9, 12.) ‘scale ffom zeroto fourteen. Acidic substances are 2 -Feactve whereas basic substances £6 noon FOR 3 isacidic, basic orneutal, Positvepart ofa salt comes fom. and negative prt comes pHofsalivaisless than. : ‘Base soluble in water is called. (Colour ofits in newral solution 8 ‘Litmus solution is mixture of yes which is obtained £0 enone ‘On adding few drops of phenolphthalen indicator in dilute sulphuric uc, colour of solution remains. ‘On adding few drops of phenolphthalein indicator in sodium hydroxide, colour of solution turns... pH{valuect. (C2020 Set A) from. (CG 2020 Set 10. nh auton ses than 7. mee (069 Ca 127 sn? soto ie ict 12 pitt ae rai 1 pinot ot 1 ean omen ac — if Naotibeeces be (eam S84 1g iowioe cae ler nemmatoon seed Fe ee ee cf ean nda a seo is an dit esl te, 1, Guang ov dpe ore orang a i el croton (662024 sq, ane Sag nid ee ae Ce atSSd hte Sear von 0) 2 pits fran ater (coamuseg) yi cmc dented a Tasca on 20 Elma bined fom ved! Ba temper ca quay of an OFF lens ae formed yy Yr par ine tion's vale aon AWG ie ta le ote win : inition ope wr eats tbe contrat 2, Nan ofa firmed song cian songs. thon ce 24, Narre of sat formed by weak tid and song bse. at I acid and weak base is . 25. Nature of alt formed by weak acid ; (comisec, (C62023 564,38, 26. In dental decay the pH ofslivais less than CO Ceo FT :CO CSO CH CONTE, MeCIy COED NOD, 27. pli valu of aoation 2, Bene ‘Ans. 1p, 2 More, Les, 3. Sale 4. Bass Acid 5.7, 6 Alkali 7. Violet, 8, Liches, NeHCO,,C2CO, 81g. Basi 14. Addi 15. Strong, Ant Acc i “alt! CF .NO5,COF- SO',CH,CO0",CF,O8- SOF JHCO;, 9. Colorless, 10. Light pak, 11. Acidic, 12. Basic, 13. 16, Acid. 17. Yellow, 18, Pink, 19. 5:6, 20. 7, 21. Lichen, 22. 25°C, 23. Neutra Pe 24, Basic, 25. Neural, 26 56,27. Song acid. Very Short Answer Type Questions a ana: NHK NEO NH Mg,Ca" Aca! Nig Qype se sim? the nature of aqucos Foun hire lain Epa. Ans. Picke is not stored in copper and aluminium contanersto prevent from acidity 4, sone) tae eae neste at and basicity because its pH vale gets changed Wend OF gues KCLsuton ease MODEM UN Q.2 A smal amount of etal lin Karen's clothes daring Inch Ae, ashe dhiiceeces she applied soapon that area, then th cloth became red. Explain ts eause. —> Kon eeu nt en (Comssey 2 Witnesfvonciinndin amas CCN ‘Ans Soaps ar fatty salts, that react with vegetable juice and act as acid-base indice. dos LAmSue Choo to, whch changes color 2Tenateaed (CMO Q.3. Suresh blind student. Which indicators can he wse to dentity acd and 13. Tdeany oo base? (CG2019SetA,735eO NO, NasCOn COMM ‘Ans. By using olfactory indicators. ‘Ans Nas00,,Ca(0E, . 4. Write balanced chemical equation for the reaction of Calelam hydrogen Q.14 low are acd and bates date byeifcoryiadeators? ‘carbonate with hydrochloric acid. ‘Ans. Indicators which give infomation of he change in thes our wth aid and ‘Ams. Ca(BCO;)y) + 2HCyy —? CaCl + 2H,0(9 + 2CO x base ae calle olfactory indicators. Like detain of dour of onion is dene by his Q.5.Now-metallic oxides are acide fn nature. Give example. {indicator Odour of onion doesnot change inthe presence ofan acid bathe cdo of een Ans. Non-metallic oxide reacts with water and form acid, therefore they are acidic in vanishes in the presence of a base, nature. Example: Q, 15. pH value of fresh milk is 6, What isthe change in pH value afer the SOx) + Hi Ou) —> H,S0; formation of curd ? (CG 219 set, 24868) Salpharous acid ‘Ans pH of fresh milk is 6, but inthe formation of curd, Ht ion concentration in- Q.6 Identify the acid in the following : ‘ereases, due to which its pH value decreases, NOs, Na;CO,, Ca(OH), HC. Q.16. Write full form of pH. Ans. Full form of pHi: Potential of Hydrogen. ‘Ans. Acid : HNO, and HCL 28] Nav Paria Sar n u nd an anon I cle oni EATEN aman ' reer a vet me nai Stare a wy sonal ai i We sO Q.19. Name any (vo natural source ia which b ‘Ans. (2) Lime, (0) Baking soda. (Q.20, pH value of «solution ie 4. What willbe the concentration of (fon Aas. 104, Q. 21. For the prevention of teeth, which type of tothpaste should be used ty lean teeth, Why ? ‘ "Ans. Alkaline toth pste should be used. Ifaciictootypasteis used, tooth decay wi, sat (Q. 22. Classify the following as acid, base and salt. (@NHOH, ©) H,80, () BaCl,, (@) NaOH. Base Acid Salt Base ‘Short Answer Type Questions (Q. 1. pH value of some substances are given inthe following table : (CG2018 Set A, B,C) Analyse the table and answer the following questions (a) Nature of which substances are basic ? ‘Ans. Baking soda and NaOH solution (Sodium hydroxide). (©) Which substances are of acidic nature ? ‘Ans. Lemon juice and Vinegar. (© Nature of which substance is neutral ? Ans. Water. (@ Which substance is a strong base ? ‘Ans. NaOH solution (Sodium hydroxide). (©) Which substance is a strong acid ? ‘Ans. Lemon juice. (CG 2020 Set B) (CG 2020 set B) (CG 2018 Set A, B,C) mee (C) Cam X29 onerente seen om ‘vi er (Owning saa ‘Aas. Acid whic bane 6 coog nd whch eae jm mtr, ald" doe Th, “Bin water ae kown a we sie, Like CH,COOKL en called wrong nid. Like CY HINO, ed daring teraction of mt wth remed apa by ace an siogageta ats el opm pwnd TE, ‘on coming in contact with hydrogen gas as eae . Ma" HC\—+ mac, sae oh ie i THe Ga Fra lt cp twcn (ce fa ec us tase ofl oT Sadia 2 Fo ges NSO, should be between Sto 8, For the contd bret ‘he control of his, pH value mantre mee uh hea ee (QS. Whstts neutralization reaction ? Explain with wo example. (C6219 8eA,8,0) iscaled neutralization reaction, ee Example: LHC) + NAOH) —> NaCl + 140, 2 HCl) + KOH) —9KClag HO, ied baking soda in fresh milk and changed its pH from 6 to. ore ime willbe reqredtoconvert his mifk toc. Why? (CG20U Set) mixing baking soa (NaHCO;) in miki pi vale increases, therefore me miata Q.7. What is salt? How isthe nature of salt determined ? Explai by giving the ‘examples of NH,NO and Ns,CO;, (CG204Se4,8,0) “Ans. Slt are those ionic compounds in which one parti positively charged andthe ‘other partis negatively charged. They contain same number ofcaion and anion Ths, ats sre electricallyneutal, Salts which are formed by strong acid and song bse cr weak ad and weak base and neutral in nature. Similary salt formed by weak aid and stongtaseis basic in nature and sat formed by weak base an strong acid is acidic in nature. Like: NH,NO, + H,0—> NH,OH + HNO, Acidic Weakbase Strongacid Na,CO, + 2H,0—+ 2N:OH + H,CO, Basic ‘Strongbase Weakacid 0] aoa Pet ample: PopateNoy NI +05 ‘ase Ace vada wes! 20, +24" +605 Basie" sada (0.8. what eat rain Write ts eo barf fl! ‘Ans. Carbon dionide (CO) a Pustance react with water and form various acid, reduced py mining ofthese i an water called “Aidan. Examples Peo => HCO, 2BGrG > 380, ee as nsty GNosko > IN, FHarmfal efects of cial: 1 Causing bar oveuble monies 2bomesinrtotphoain gan tng the emoun oily and bas Feit eo aubance And B are 82 and 2S, Which of hes ab stance i eee and heh Is bane ? Which of thas subances can De wid a8 an antacid (CG 2017 Set) “tis, Substance A is basic, ubtanceB is acidic. Substatce A can be wal 8 an snacid 1 10. Clasiy the allowing int strong base and write thelr formu {Golydrochloric acid (0) Sodium hydroxide (Ammonium hydroxide (2) Acetic acl. ‘Ans (2) Stongacid Hytochloric acid GHC) (© Seong base Sodium hyeronide (NaOH) (9 Weak base Ammonium hydroxide (NHOH) (@ Weakacid —_Acaic acid (CH,COOH). 0.11, Matis indicator ? Write its three types. Give one-one exaripleof each. ‘Bos Tndiatrarsuch chemical substances which on adding ina compound, den fies its acidic and basic nature by a change in colour. ‘These are of three types 1. Natural indicator : Rose or hibiscus flower, Turmeric stained cloth. 2 Chemical indicator : Phenophthalein, Methyl orange or Methyl red 3. Olfactory indicator : Onion, Clove oil or Vanilla Q. 12. How does Hydrangea plant change its colour on the basis of nature of soil? Explain, ‘Ans. Nature of soil is acidic, then colour of Hydrangea is blue and when soilis slightly basic then it represents pink colour. Q. 13. Kamila is playing in the garden. A wasp bite her and she started crying, Her mother immediately applied toothpaste on the affected area and then took her t the doctor. 1, Whats injected in a wasp bite ? 2. Why did her mother applied toothpaste ? ree Bonde 60,) and oxides of nitrogen (NO, cid, weak acl, strong base and weak Sete (C2 Cate x 34 infected in a wap tit wich es at ima ae ition an pai, mcr sicnatueitrenct th aided cada to neale 14. Youthave been given the eiceomeenetan eee soe juced and the gas released extinguls an the basis of the fol aa Balanced chemical eqentas nin he the et bef sou cngento oe, iat oon sds Se isis released with ef tear teningises, remse hs pac vescence. On bringing a burning match sti ee po ot np nye () Labelled diagram ofthe apparates (Balanced chemical equation: CaCO, +28C1 —+ Cac + 10+ C0;t .2. Write the importance of pin dll life, Give reason wit does start whe Bot mother 5, . salar 3. pH of cur nearby water, soil pla an important olen or diy life. Like 1. Process of digestion and pH : Our stomach produces dilute hrc acid. helps inthe digestion ofood without harming the stomach. 2. pl of blood and biological active: pH range of our ool is betwen 6 819 1-8 whichis suitable for biological actives becatse this pH range extablishes appropriate balance ofmaximum chemicals between blood plata and tera. 3. pH of saliva : Tooth decay stars when the pit ofthe saliva in our mouths lower than 55 Forts prevention, we should clean our tech with basic tootpaste, 432] Navtedh Parada Sear trance eed ts beads se atte ie toe my Se nrc at ts Po I an cry prt: i et cy act pit racy? cen tobe pote more rls than is ey ot ft the prod + Bi ee via be ha gee Bo anne aeanwamcb mamaria may, ein caren On ms ‘sat Seay ste Gree eat Semen Sams o Sy ite sean Omeogyeate Giregyinie a sear i Ot acorn dC ge lon he tale On saa ita te eogs falc 4, 2 LB. (© Wich station will not be affected by Uitmus solution ? (6) Which solation mill ura re litmus to blue? (Gi) Which sotation wil give CO, with carbonate ore lke calcium carbonate, (dv) What does pH value indicate. 1 ‘Ans. (i Solution A will not be affected by litmus solution. G Solution C wit tra red ims tobe. (Gi) Solution B whichis acaic wil give CO, with calcium carbonate (iv) pHLvalue indicates the concentration of hydrogen ions. HEAT AND TEMPERATURE Objective Type Questions 12 Q. 1. Choose the correct answer : 1. Between objects A nd B, ifthe specific heat of object Ais less than that of objet (11) B, then: L 2. Highest point in celsi (2) Object A will get warm soon (©) Both with get warm at a same rate (&) Object B will get warm soon @ None of the above. Ans. 1.(),2.(0,3. (84 Q.2.Make correct pairs o 10, n. MCh he atone mater fe ooo caer be 1 oule Mencan bet (sais Thera Oiir rr bitin” “egies ato tn rt nn el SS O1:2:3 ome any, (418 core (Gs (rent, (@Dewe Kevin, © Onethisd ()Tace oe fee ya O3G6O7.0.809.0.10.018 SE i eats transmit from one substance tothecther — SL unitorhea (CG 2019 Set Level ohatnes or coldness CChangein temperate eat required forthe change in py sacisinomes Bad conductor of heat Absolute ze Fahrenheit thermometer ‘Reaction in which heats iberated (CG 2020 set) Unit of specific heat (CG 2024 Set B) Unit eat capacity Absolute temperature seale ce @ Joule -A,22SetA) (b) By conduction mown as (@) Dueto exchange of heat energy (@) Latenthest (©) Temperature (Daniel Gabriel (CG 2018 Set) (@) Wood (CG 2018 Set A) @ -27"C (CG 2018 SetB) @ Exothernic (Soule Celcius W Joule /Kg Celcius @, Kelvin, Ans. 1. (1),2.(@), 3. (©), 4.2), 5. (4, 6. (8,7. 0,8. (9,9. @, 10. (8), 11. @, 12.0). . @ 33K @) 23K ” Lowest point in celsius scale scale Senn (66 Cam x38 piesa . @ lore 5 teanannhorains Ti po Partestireet om, ‘hy romper ire tempts rah a etc he 5 Lowen pint Ketin se 2 (corms, ‘An Ht awa Rowen aly thigh em & Highest puntin Kelvin sole & new Seq) erature, During tie procs an ese mPa othe by tower te ss HOR Weems ery Ppetene aetna eee nappa ea FB rts 5 046.027.1058 00 Seite Wha es tasmanian Anas. 1. (A), 2 (0h 3. (4 (0: ‘come equal, then thei cp of the be Laks (CG 2019 SLB, 24 5 a a ee emperatre become ea 7 eatin ota rbsance tii (CG.2020 Sarg) agg 77M ner eraemlaion of heat by conection no pone 2 Aitrerherterace Or in, (CERIO Se ‘Ant. Particles of sid ae ih sa yi . i na ao na a ae Fenech a ene ms byt a a pn 4 ho. grou forthe transmis yen or aes FTE Change Senecio et pre nl — jae Stee ea ees oe = ™ a ‘“ Ta enown as father of Modern Physi Ta putesif dad ‘Ans. The amount of eat required torte the tesperstteof stay nah oe $ ogre nya snore rin ep ete FOR C=5x(-2)=-10. 9s F-32=20%9 Fe 180+32=2127, fase’ smn en th rece aahtae me emparat, tan: nhs mods, Det Pets nade of anarisc. ERs enc rarice beets ‘itereaces betwee place Benen objects Sythe movement of particles rough direct Soma By eating he 000 ‘eben eases om ncend to enter. >. Heat ransts ely in sol. stm this process modus ewe 2, Heat transmitsin guid and gas 3, inthis proces mediust isnot needed. Q.5 Mercury ls wre in thermometers. Why ? Ras, Because ofthe following reasons me 1 has uniform rateof thermal expansion 2 edocs not wet the glass. 3 its expansion rates higher than the other Liquids. 4 Mereury is good conductor of heat ‘5. Mereury is easily available in pure tate. isa 8 igus f0 cs tl every Pat fh seananiodin saint inepa: Noma Samy x Silvie ma “ cae on} TWaladestothemechang| Ia which heats tans without any pica cog, Terberween objects. eg, Heating water sing snes Heattransmltsin all rg soli, gud and gas. In this proces medium not needed tury is used in thermometer 6. tts feezing points 37°C and boiling point is 357°C. 0. 6. Normal temperature of human body is 98° calsus ? F-22 | C-0 Sol a 212-32 "100-0 F-32_C = 180 100 F-32_C « 95. a de-m-c Le, value of 98-6 in celsius willbe: 5 = 5986-32)" c= 5086-32)°C (666°C =37° o 986°F =37°C So, 37°Cis normal temperature of human body. '6°F, What willbe it in degr (CG2017 Set A,B requires 80 kel othe O Wise doc the AB, BC, CD, DE part the graph repeeeat? ets i cD ancora heonpenae ee ee ee Partrepresentsthe change ofliidintovapeut nee Matto isidand DE Q.12, Whats thermal inslator material? (carmseay ‘Ans. Materials which dont allow cae ie Matin wich dona alow hats hohe dry ant Q.t8. Whats ermal contac per i, htc co anes tn 14 Wat thermal ad coda (ccrmse tea cit Stn wih tal behets oh aa ot ves Dt dngam Tah terme tag ett camnsan) ‘Ans. In Fahrenheit is Fahrenheit scale, lowest temperature is 32°F and highest temperatures 2127. (C22 serB) one cstoanather ae: serra rte exe seam of eontgrae 8 and highest tempera, (9.16 Drawa dingo gested nd hi! thy, sense owt is marked at 100°C. 100°C) ie 8 i a19e" rs ute os reat showing I aw adlagramofKelvinscalethermmeteePYSB°WY CC o900 5 ke esttemperatuc ot tnrmal pss tones erperane8 273 Sa heme aT g 5 oe snd. Lgsten? Witt outa enatentnopeets aen in relation between them ? “Ans. Uait of heat in CGS. system is Calorie and in , I. system is Joule, 1 Calorie = 4:18 Joule 19, What is specific heat ? Write its S. I unit. San Te quay feat eq! orth tempat often mas ft substance by 1° is called heat epecity. ‘. Luni ofbeat capacity is Jule Kg Kelvin. Long Answer: estions Mc Ghesoeeeamplef eect aet fom yi (,Discusin details: (a) Increase in temperature, (6) Thermal expansion. (Or, What do you understand by thermal expansion ? Explainall types of therm! expansion coefficients ofa i, (CG 2017 Set A, BO ‘Ans (2) Increase in temperature : When a body is heated, it absorbs heat and hese its temperature rises. Disfrent materials require different amounts of heat forthe si increseintheitemperanre. Selene (C.G.) : Class X | 41 fm be the mass of» bay and be the amount of heat given tit, then Q depends 1. Mass (m) ofthe body, oem 2. Increase in temperature (AT) ofthe body, Qe aT 3. Nature ofthe material ofthe body, te, Qeemat Q=mS.AT i) is constant of proportionality andits value depends onthe nature of material ‘Thisis called as specific heat of material S=Q/mAT ) () Thermal expansion: On heating, genallythe length, areaand volume ofs body Increases due tots thermal expansion. Every substance soli, liquid or gas expands on heating and thisis calle thermal expansion, ‘Thermal expansion in solids : The length, area and volume of solid increases on heating, whereas on heating «liquid or gas, nly change in volume i observed. Thermal expansion in solids sof three types (@ Linear expansion :On heating sli ifchange is observed ony its length then ‘the expansion is called linear expansion. Cefcient of linea expansion is denoted by a (i Superficial expansion: Iara ofbody increases on eating then the expansion is called superficial expansion. Coeficient of superficial expansion is denoted by . (Gi) Volume expansion : On heating a substance, if inreas in volume takes place, thea the expansion isd to volume expansion, Coefficient of volume expansion is denoted | ol PeRropIc CLASSIFICATION OF ELEMENTS @ i) Objective Type Questions Q.1. Choose the correct answer 1. Position of which elements not deste inthe period table s(CG 2018 Set B) (Sodium ()Chovine (Helium (4) Hydrogen. TnMendeleev's periodic table, elements are arranged: (CG2018 Set A) (@)Ia the order ofincreasng molecular mass (©)In the order ofincreasng stoic mass (© Inthe order of increasing stnic umber (@ inthe order of increasing tome radius. Modern Periodic law was proposed by (CG 2018 sec; 19808) (@)Newiand —(&) Mosley (@)Mendeleev._(4)Dobereigae. ‘On moving down in group metalic property: (a)Neitherincreasesnor decreases (B) Decreases (6 tncreases (First increases then dereases. 23 3 4 (42 Navbodh Pails Saat be: me cunx i orrtnrmnsettti tact, gle § ticna

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