HIGH ORDER THINKING SKILL QUESTIONSCLASS XPHYSICSCHAPTER: Light and Human Eye1. A concave mirror & a convex lens are held in water. What change, if an, do o! ex"ect to find in the focal length of either#$. A man holding a lighted candle in front of a thic% glass mirror& viewing it o&li'!el sees a no. of imagesof the candle. Wh#(. )ne half of convex lens is covered with a &lac% "a"er. Will this lens "rod!ce a com"lete image of the o&*ect#+. What ha""ens to the image distance in the ee when we increase the distance of the o&*ect from the ee#,. -oes a &eam of white light give a s"ectr!m on "assing thro!gh a hollow "rism#.. A "erson is a&le to see o&*ects clearl onl when these are ling at distances &etween ,/cm & (//cm from his ee. 0a1 What %ind of defects of vision he is s!ffering from#0&1 What %ind of lenses will &e re'!ired to increase his range of vision from $,cm to infinit# 2x"lain.3. Wh an incident ra on a concave mirror thro!gh the centre of c!rvat!re, retraces its "ath after reflection from the mirror#4. Wh does a &eam of white light , after "assing thro!gh a glass "rism shows dis"ersion while it does notshow an dis"ersion after "assing thro!gh a glass sla5. In a "rism with e'!ilateral triangle as its &ase , which o!t of the three e'!al angles , is called the angle of "rism#1/. 6wo mirrors of different focal lengths give images of same si7e when the same o&*ect is "laced at e'!al distance from the mirror. How will o! identif which is concave & which is convex#11. A ra of light is incident at .// on the &o!ndar of two trans"arent media & gets refracted at +,/. 6he emergent ra travels along the second &o!ndar "arallel to the first one of the two media. 8ind the angle of emergence.1$. Is it "ossi&le for a lens to act as a convergent lens in one medi!m & a divergent lens in another#1(. How will the s"eed of light & fre'!enc change when it "asses from a rarer to a denser medi!m#1+What sho!ld &e the "osition of an o&*ect relative to convex lens so that this lens &ehaves li%e a magnifing glass#1,. Cilliar m!scles of a normal ee are in their 0i1 most relaxed 0ii1 most contracted state. In which of the two cases is the focal length more#1. 9efractive index of media A,:,C & - are 1.((, 1.,$, 1.++ & 1.., res". In which of the fo!r media is the s"eed of light 0i1 maxim!m 0ii1 minim!m#13 What ha""ens to the ra of light as it "asses from one medi!m to another if &oth the media have e'!al9efractive index#14. S"eed of light in three trans"arent media is as given;;A 1 that has a c!rrent rating of ,A.What res!lt do o! ex"ect # 2x"lain.1$. An electron is moving along A axis and magnetic field is along Y axis, What is the direction magnetic force on the electron#1(. 6wo Circ!lar coils A and : are "laced close to each other, if the c!rrent in coil A is changed, will some c!rrent &e ind!ced in coil :. Bive reason#1+. What will &e the fre'!enc of an A.C if itCs direction changes after ever/./1 sec.1,. Wh does a c!rrent carring solenoid coil when s!s"ended freel rests along north so!th direction#CHE#ISTR%CHAPTER: Chemi!a Rea!ti&n$1.Wh is "hotosnthesis considered an endothermic reaction#$.Wh are "ac%ets of "otato chi"s fl!shed with nitrogen & the man!fact!rers#(.Whitewashing of walls gives a white shin finishing to the walls. 2x"lain the reason with &alanced chemical e'!ation involved.+.Can a dis"lacement reaction &e a redox reaction# 2x"lain with the hel" of exam"les.,.Wh is fermentation of gra"es a chemical reaction#..-!ring electrolsis of water, the vol!me of the gas collected at cathode is half the vol!me of gas collected at anode. Wh# 3.How does "hotoltic decom"osition of silver salts hel" in &lac% and white "hotogra"h#4.Are all do!&le dis"lacement reactions also "reci"itation reactions. S!""ort o!r answer with exam"les.5.In the following reaction, Dn)$E + HCl;;;;;;;;;;DnCl$E$H$) ECl$ Which s!&stance is oxidi7ed and which is red!ced# Wh#1/.Wh is corrosion of iron a serio!s "ro&lem#11.In the refining of silver, the recover of silver from silver nitrate is done & adding co""er metal. Write an e'!ation for this reaction.1$.How can goldsmiths recover gold after cleaning old *eweller#CHAPTER: A!id$ 'a$e$ and Sat$1.What is the real &leaching agent in &leaching "owder#$.Wh does &leaching "owder smell of chlorine#(.-o &asic sol!tions also have hdrogen ions# If es, then wh are the &asic#+.Wh is ethanoic acid a wea% acid and hdrochloric acid a strong acid#,.How is it "ossi&le to have half a molec!le of water attatched to CaS)+ in Plaster of Paris#..Wh does a stain of c!rr t!rn &rown when washed with soa"#3.Will a sol!tion of Fa)H also cond!ct electricit li%e a sol!tion of HCl#If es, wh#4.Wh sho!ld hdrogen ions &e alwas written as H()E or as HE0a'1.5.Wh does the "H of an acid increase when it is dil!ted#1/.Wh does a &ee sting ca!se "ain and irritation# How can it &e c!red#11.Wh does a ca%e sometimes &ecome &itter on !sing &a%ing soda# How can this &e "revented#1$.Are hdrated salts li%e Fa$C)( .1/H$) wet# CHAPTER: #eta$ and N&n(#eta$1.Which melts at a higher tem"erat!re# Wh#$.Al!min!m is more reactive than iron, et iron corrodes faster than al!mini!m . Wh# (.Detal D was di""ed in a sol!tion of lead acetate. Gead was fo!nd to &e de"osited after sometime on metal D. Which is more reactive and wh#+.Wh we cannot !se al!mini!m !tensils to store an al%ali#,.When calci!m metal is added to water the gas evolved does not catch fire &!t the same gas evolved on adding sodi!m metal to water catches fire# Wh#..Wh is co""er !sed to ma%e hot water tan%s and not steel#3.A metal D does not corrode when left ex"osed to air. It occ!rs in nat!re in the form of its oxide and is !sed in thermit reaction. 0i1 Identif the metal.0ii1 -escri&e how this metal is o&tained from its concentrated oxide.4.Wh are metals good cond!ctors of electricit#5.P!re gold is !nfit for ma%ing ornaments. Wh# 1/.Can we ma%e electric wires !sing &ron7e# ?!stif o!r answer.11.Solid sodi!m chloride does not cond!ct electricit whereas molten sodi!m chloride does# Wh#1$.Iron does not &!rn on heating &!t iron filings &!rn vigoro!sl when s"rin%led in the flame of the &!rner. Wh#CHAPTER: Ca")&n and it$ C&m*&und$1. Wh does car&on form com"o!nds mainl & covalent &onding#$.Wh do covalent com"o!nds have low melting and &oiling "oints#(.Wh are covalent com"o!nds "oor cond!ctors of electricit#+.How are car&oxlic acids different from mineral acids from ioni7ation "oint of view#,.Wh is vegeta&le oil containing long !nsat!rated car&on chain considered healthier than animalfat which have sat!rated car&on chain#..Wh is ethanoic acid called glacial acetic acid#3.What wo!ld &e o&served on adding a ,H sol!tion of al%aline "otassi!m "ermanganate sol!tiondro" & dro" to some warm ethanol ta%en in a test t!&e# What change in o&servation is madewhen "otassi!m "ermanganate is added in excess#4.Wh does com&!stion of ethne in air "rod!ce a ellow flame#5. Which"ro"ertof concentrateds!l"h!ricacidisill!stratedwhenethanol isconvertedintoethene#1/.Wh do the &ottoms of coo%ing vessels !sed at home get &lac%ened#11.Inder what conditions an oxidation reaction &ecomes a com&!stion reaction 1$.Write an e'!ation for the chemical reaction which shows the acidic nat!re of ethanolCHAPTER: Pe"i&di! Ca$$i+i!ati&n1.Ising the "art of the "eriodic ta&le given &elow answer the following '!estionsG"&u* I II III I, , ,I ,II -Pe"i&d1 H He$ Gi :e : C F ) 8 Fe( Fa Dg Al Si P S Cl Ar+ @ Ca(i) @has "hsical and chemical "ro"erties similar to which element and wh#(ii) Write electronic config!ration of F and P. which one of these will &e more electronegative andwh#(iii) State a chemical "ro"ert similar to 8 and Cl#$.A metal D forms an oxide having the form!la D$)(. It &elongs to the third "eriod in the Dodern Periodic 6a&le. Write the atomic no. and valenc of this element(.What is the relationshi" &etween oxide ion and Feon atom#+.6here is one electron in the valence shell of A and three electrons in the valence shell of Y. If the are in the same "eriod , which of them wo!ld have a smaller atomic radii #,.Wh are halogens good oxidi7ing agents#..Wo!ld o! "lace the two isoto"es of car&on CJ1$ and CJ1+ in different slots &eca!se their atomicmasses are different or in the same slot &eca!se their chemical "ro"erties are same# ?!stif the same3.Where do o! thin% hdrogen sho!ld &e "laced in the modern "eriodic ta&le# ?!stif o!r answer.4.An element A 0$, 4, $1 com&ines se"aratel with F)(J, 0S)+1$J and 0P)+1(J radicals. Write the form!lae of the three com"o!nds so formed. 6o which gro!" of the "eriodic ta&le does the element A &elong# Will it form covalent or ionic &ond# Wh#5. )n the &asis of DendeleevKs ta&le, answer the '!estions that follow the ta&le.0a1 S!ggest the form!la for the followingL0i1 )xide of "hos"hor!s0ii1 Hdride of nitrogen0iii1 Hdride of car&on0iv1 )xide of al!mini!m0&1 In "eriod , of the "eriodic ta&le wh does 6eleni!m with atomic mass 1$3../ a""ear &efore Iodine with atomic mass 1$..5/0c1 Ising atomic masses of Ca, Sr and :a find the average atomic mass of Ca and :a and com"are it with the atomic mass of Sr. State the concl!sion drawn from this activit. 1/.Which of the following will have the smallest and which will have the largest atomic radii, Ca, Ca$E, Al, Al(E11. Wh is 7ero gro!" "laced at the extreme right of the "eriodic ta&le# 'IOLOG%CHAPTER: Li+e P"&!e$$e$1. What will &e the effect on the &od if li"ase en7me is not secreted#$. -ifferentiate &etween chloro"last and chloro"hll.(. A "erson is ver lethargic and gets tired easil. Which n!trient=s are lac%ing in his diet#+. A "erson has ver low imm!nit against diseases. His &lood sam"le was tested.What co!ld &e the "ro&lem#,. Com"are res"iration in "lants to that in animals... Com"are the f!nction of small and large intestines.3. What is the significance of the n!m&er of cham&ers of the heart in maintaining the &od tem"erat!re of anorganism. 2x"lain.4. Com"are alveoli and ne"hron with res"ect to their f!nction and str!ct!re.5. What are the common feat!re of all s!rfaces where exchange has to ta%e "lace in the &od#1/. Com"are haemoglo&in to chloro"hll.11. Wh sho!ld thin t!&ing &e !sed in the "rocess of dialsis#1$. Wh is more energ "rod!ced d!ring aero&ic res"iration as com"ared to anaero&ic res"iration#1(. What is the location, str!ct!re and role of dia"hragm in the h!man &od#1+. Wh is trans"iration sometimes called Mnecessar evilK in the "lant#1,. Wh do xero"htes exchange res"irator gasses at night#1.. Wh is root "ress!rethe ma*or driving force for water movement in "lants at night#13. How are alveoli designed to maximi7e the gaseo!s exchange#14. How arev the following designed to "erform their res"ective f!nctionsL Stigma,, xlem .15. Wh is do!&le circ!lation necessar in h!mans#$/. What is the difference &etween trans"ort material in xlem and in "hloem#$1. What are the conditions necessar for a!totro"hic n!trition# What is the macron!trient categor to which the "re"ared food &elong to# In which form is it stored#$$. What wo!ld &e the conse'!ence of deficienc of haemoglo&in in the &od#$(. What are the com"onents of trans"ort sstem in highl organi7ed "lants#$+. Wh is it necessar to se"arate oxgenated and deoxgenated&lood in &irds and mammals#$,. What are the different was in which gl!cose is oxidi7ed to "rod!ce energ in the &od# CHAPTER: C&nt"& and C&&"dinati&nN1. Which organ secretes a hormone for the control of &lood s!gar# Fame a digestive en7me released & this organ.N$. How do reflex actions differ from invol!ntar actions# N(. It is %nown that the root of a "lant moves towards gravit and the leaves of a to!ch me not "lant res"ond to to!ching & c!rling !". How do these two movements var from each other#N+. Which endocrine gland is affected & the a&sence of iodised salt from the diet# Which hormone is secreted & this gland# What will ha""en if there is "rolonged a&sence of iodine from the diet#N,. Com"are and contrast nervo!s and hormonal mechanisms for control and coordination in animals.N.. What is the difference &etween the manner in which movement ta%es "lace in a sensitive "lant and the movement in o!r legs#N3. Wh are "atients with severe dia&etes treated & giving in*ections of ins!lin#N4. If ins!lin is secreted in excess the &lood s!gar of the &od wo!ld fall m!ch &elow the normal level. How does the &od "revent s!ch an event!alit#N5. Which signals will get disr!"ted in case of s"inal cord in*!r#N1/. 2x"lain how do we detect the fragrance of a "erf!me#N11. 6he &eating of the heart and hearing so!nds are &oth controlled & the &rain. How do these two actions var from each other#N1$. O Chemical coordination in o!r &od is !nder the control of o!r nervo!s sstemP . ?!stif this statement ta%ing adrenalin as an exam"le.N1(. S"ondillitis is a disease where there is swelling if the verte&rae of the nec% region. Peo"le s!ffering from this disorder often s!ffer from vomiting sensation. Can o! ex"lain wh#N1+. What is the role of &rain in reflex action#N1,. What are gametes# Which organs secrete the hormones res"onsi&le for growth and mat!rit of these cells# CHAPTER: H&. d& O"gani$m$ Re*"&du!eN1. Plasmodi!m re"rod!ces & &inar fission. State the advantage the "arasite gets &eca!se of this t"e of re"rod!ction.N$. Wh is fragmentation not "ossi&le in ver com"lex organisms#N(. Is starfish growing its lost arm an exam"le of re"rod!ction & regeneration# ?!stif o!r answer.N+.What are the advantages of asex!al re"rod!ction over sex!al re"rod!ction#N,. What difference is o&served if we c!t a "lanaria and a hdra into three or fo!r "ortions#N.. What is the im"ortance of -FA co"ing in re"rod!ction# N3. Sex!al re"rod!ction has "laed a greater role in evol!tion than asex!al re"rod!ction. How#N4. Wh are &!tterflies seen fl!ttering aro!nd a "lant with flowers in f!ll &loom.N5. How does the em&ro get no!rishment inside the motherKs &od#N1/. What are the common feat!res which a""ear &oth in &os and girls on sex!al mat!rit# Which endocrine glands are res"onsi&le for them#N11. How does re"rod!ction hel" in "roviding sta&ilit to a "o"!lation of s"ecies#N1$. Fame those "arts of a flower which serve the same f!nction as the following do in the animalsLa1 testis&1 ovarc1 eggsd1 s"ermsN1(. -ifferentiate &etween vasectom and t!&ectom.N1+. wh is variation &eneficial to the s"ecies &!t not necessar for the individ!al#N1,. How will an organism &e &enefited if it re"rod!ces thro!gh s"ores#N1.. wh are the testes extraJa&dominal in location#N13. ODotherKs &od is designed to !nderta%e the develo"ment of a childP Comment on the statement.N14. How are re"rod!ction and heredit interlin%ed#N15. How is the "rocess of "ollination different from fertili7ation#N$/. What will ha""en if an ov!m is not fertili7ed# -escri&e the "rocess in a se'!ential manner.CHAPTER: He"edity and E/&uti&nN1. 6wo gametes in h!mans com"rise of ha"loid n!m&er of chromosomes each.Famethe "rocess which hel"s to maintain di"loid condition in h!mans.N$.Sex chromosomes in h!man male is misJmatched "air.Comment.N(. 6he genot"e of white flowered "lant is WW and that of "!r"le flowered "lant is ww. When these two are crossed,What color of flower wo!ld o! ex"ect in their 81 "rogen#0a1 Bive the "ercentage of "!r"le flowered "lants if 81 is self "ollinated.0&1 In what ratio wo!ld o! find the genot"es WW and ww in the 8$ "rogen# N+. How wo!ld o! "rove that &irds are closel related to re"tiles#N,. Fame the "rocess & which different s"ecies are generated thro!gh ears of c!ltivation. Ill!strate with an exam"le.N.. 6hro!gh a flowchart ill!strate genetic foot"rints of h!man evol!tion.N3. 2x"lain wh traits li%e hair color and height are geneticall inherited. -o "ower to lift weights and reading of german &elong to same categor#N4. A man with a &lood gro!" A 0IAIA 1marries a woman with a &lood gro!" : 0I:I: 1. What is the "ro&a&ilit of their da!ghter having &lood gro!" )#N5.St!d the given data and answer the following '!estions Q Parental "lants cross fertili7edand seeds collected81 0first filal generationoffs"ring 18$ 0Second filal generation1Dale "arent alwas &ore "!r"le flowers.8emale "arent alwas had white flowers((/ seeds sown and o&servedAll ((/ gave "!r"le flowers)!t of ++ seeds ((seeds gave"lants with "!r"le flowersAnd 11 seeds gave "lants withwhite flowers0a1 What is the term for this t"e of cross#0&1 As "er the data of the col!mn mar%ed 81, identif the dominant and recessive traits.0c1 State the law of inheritance as "er Dendel to s!""ort o!r answer in the a&ove '!estion.0d1 2x"lain the genot"e of the 0i1 Parents0ii1 81 "rogen0iii1 8$ "rogen N1/. 6wo isolated s!& Q "o"!lations of :eetles &ecome different from eeach other and event!all mem&ers of these two gro!"s will &e inca"a&le of re"rod!cing with each other.0a1 Fame the "henomenon occ!rring in the a&ove statement.(b) Dention the "rocess that res!lt in the a&ove mentioned "henomenon.CHAPTER: Ou" En/i"&nment1. What do o! thin% is the advantage of dis"osa&le "a"er c!"s over dis"osa&le "lastic c!"s#$. Wh is "ond is selfJs!staining !nit while an a'!ari!m ma not &e so#(. Com"are a man with vegetarian food ha&its and one with nonJ vegetarian food ha&its & ma%ing food chains. Which food ha&it is advantageo!s from the "oint of view of energ gain if the amo!nt of organic matter at "rod!cer level is e'!al in &oth the cases# Bive reasons.+. 0a1 Arrange the following organisms in $ food chains Q 9a&&it, Seed, 2agle, Sna%e, 9at, Carrot, Gion0&1 -e"ict the organism in form of "ramid showing all tro"hic levels.0c1 Which organisms will occ!" at third tro"hic level# Which level of cons!mers will it &e with res"ect to each food chain#,. A farmer !ses nitrogeno!s fertili7ers & insecticides in his rice field. 6his cro" serves as food in followingchains LJ9ice Dan JJJJJ 8ood Chain 19ice Hen Dan JJJJ 8ood Chain $0a1 If the fertili7ers & insecticides is eaten along with the rice, will man &e affected e'!all in 8ood Chain 1 & $#0&1 Fame & define the "henomenon involved.0c1 If the field "rod!ces same amo!nt of rice in &oth the cases, will man get e'!al amo!nt of energ# ?!stif... How is that 9efrigerators harm the o7one laer in the atmos"here#3. Which organisms can ma%e organic com"o!nds li%e s!gar and starch from inorganic s!&stances !sing radiant energ of the s!n# Fame $ s!ch organisms. Which "osition do the occ!" in a food chain#4. St!d the "ict!re given &elow and comment on the encircled organisms with res"ect to Q0a1 6he categor according to the food the eat.0&1 Percentage of energ availa&le at their tro"hic level.0c1 6wo &iotic com"onents of the ecosstem inha&ited & them.0d1 2nerg !sed for food "rod!ction & the "rod!cers.CHAPTER: #anagement &+ Natu"a Re$&u"!e$1. Altho!gh conservationists are not de"endent !"on the forests, wh do the have a sa in forest management#$. What is the "re*!dice against the traditional !se of forest areas !nfo!nded#(. How is conservation of forest directl have a &earing on the conservation of soil '!alit and water#+. 2ven tho!gh the Yam!na flows thro!gh -elhi, its citi7ens face a water shortage. Bive reasons.,. What can o! as an individ!al do to red!ce o!r coms!m"tion of water#.. What changes wo!ld o! incor"orate in o!r lifestle in a move towards s!staina&le !se of o!r reso!rces#3. Can o! s!ggest some changes in o!r school to ma%e it environment friendl#