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fiCflfc1(1 -qff~ - 1,2012 SC2-057SUM MATIVEASSESSM ENT -1,2012 r~DSCIENCE llOI2.. 'L-L

Cfi~ - X I Class- Xf.ruffur ~ : 3~Time allowed: 3hours

~a:{q:;: 90Maximum Marks: 90

~~(i) ~ 1r.A " ~ cnTc::T

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'4llT -sr / SECT ION -A1. ~~mCfiTfcMft ~~~.rcR~Rcp:rrWn? 1

What happens to a magnetic needle when it is brought near a current carryingconductor?

:-....:-s s an gi Is show 10 s cr- gesin appearance.Namecr es..1

2

- ~ ~ Z -ica eeoio ? e he substance

2Nap, AIP3' ZnO ,C02 KpWhat are amphoteric oxides? Choose the amphoteric oxides from amongst thefollowing oxides:Nap,AIP3' ZnO, CO2, Kp

6. 5 C 31f cm CfiT20 V fci~ ~ ~ ~an ~ ~ ~ ~ ~ fc!1mT f

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a B-1 {1B14!+t, fI'""IICfi{olCfi1~ ~ Cf11

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Sate two applications of heating Effect320 J of heat is produced in secocurrent flowing through the resis1~WICfiB e-m ~ ~ ~ ~ :

1['-- r -= -~ N t1~ ~~==~~XDiluteN.OH ~DiI"'" Hel/ /iZinc / )yNaCO,(S)

1

~01 NaOHNa?CO(5)- 3

rv

(d) IV

r- ) ? ; : o ; / u , e NaOHNaCO,(s)

IV

/I 11/m -B e 3 1 '1 -B ~ -B ~1~$1"11TB 11Cfi8'n%:(a) I (b) II (c) IIIFour experimental set- ups are shown below:

II III

The set-ups that would result in rapid evolution of hydrogen gaswould be:(a) I (b) II (c) II I (d) IV

30. f1'"1f~@d -q - B ~ ~ -ga;u r 1@ ~ ~ ~ ~ ~ ~rR'l1q fc!w:R ~ t(b) "lW{~ fc!wR ~ t I(c) "lW{~fc!wR~~tl(d) ~

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(a) C !1 'ft:R ~ fc:fwR ~ ~ f;fcn C fiT ~ c n 1 ~.m I(b) Zns:J 4 fcfwR ~ ~ C fiT ~ c n 1 ~~.m I(c) Zn G~ CU~ Cfil ~"Bl~ -r p :f CfliII(d) ~~RGj HN03swiTiTo show that zinc is more reactive than copper, the correct procedure is to :(a) Prepare Cus:J 4 solution and dip Zn strip in it.(b) PrepareZns:J4solution and dip Cu strip in it.(c) Heat Zn and Cu strips together.(d) Add dilute HblOs on both thestrips.

32. ~"5ffiRt~ i f ~ m u (I) C fiT f .r .m I T fcr~ (V) 'R ~ ~m~1~ - i f ~ ~ 1~ f .:p :; :r-qftq~3 T it& ~ I -qftq~- i f '1 I J O li fC f l< :l 'l1 flT X , Y ~ Z ~: t:

+Z

~H.~(a) mcRr~, c i h .:c :s:i 1 2{, ~ (b) q 'I (" C :4k {, ~~, ~(c) ~ ~ c j l( "C : 1 " " l 12 { (d) >I f C rU ~, ~, q 'I ( "C :412{A student draws the following circuit diagram for the experiment on studying thedependence of current (I) or potential difference (V) across a resistor. The partslabelled X, Yand Z in the circuit diagram arerespectiveiy:.J ..., Z

(a)(c)

Resistor, Voltmeter, AmmeterAmmeter, Resistor, Voltmeter (b)(d)

Voltmeter, Resistor, AmmeterResistor, Ammeter, Voltmeter

33. ~ ~ -qftq~- i f ~ ~ ~~ - i f ~ f uw r 'tTIUG ~ ~ fuU ~ ~ "3(q?ffcr~ 1f .:rs :; :rm - i f~~t:

3W1 - i f ~ ~ C fiT >I fC rU 'tT C f i G T C f iT " I1 R ~ :(a) 25 (b) 20 (c) 15 (d) 10The current flowing through a resistor connected in an electrical circuit and potential

t A ts J + aZ.J ($

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difference developed across its ends are shown in the follow ing figures.

vThe val ue of resistance of resistor in ohms is(a) 25 (b) 20 (c) 15 (d) 10

34. ~ ~ ~ ~ lR ~ nl?IT0.53lcn ~"l1Uf 20~ ~ I ~ CflT31AdlliCfi % ;(a) 0.025A (b) 0.05A (c) 0.01A (d) 0.25AAn ammeter has 20 divisions between zero mark and 0.5 mark on its scale. The leastcount of the ammeter is:(a) 0.025A (b) 0.05A (c) 0.01A (d) 0.25A

1

35 . - , ; m : ~ A1' A2' A3 nl?ITA4 f1 >ffirU m ~ ~~ ~ -qftq~:f ~ ~ ~ ~ ~ f c n~m:f ~ TTA2' A3 and A4 are connected to different resistors in a circuit asshown in the following figure. Minimum current will be recorded in the ammeter.

+A - 10 3D +A-1 3+'A -1----'\1VV1IV'----.:..;n440

(a) (b)'----'\1V2VD\N'_ .....;+-iA -

(c) (d)36. f1-qftq~l: f \jj) ~tl ~ l: f ~ ~ TDJ ;t~~

+ A1

B D

(a) CB,A GI?IT0 (b) B,Cnl?IT0 (c) C,DnI?ITA (d) A, B'd'I?ITC

The resistorswhich are connectedin series in the following circuit are:

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.'

+ A

B D

(a) CB,A and D (b) (c) C,D and A (d) A,Band C,C and D37 . '~~~~~>JCliM~~I' ~Cf>8~~fcl;-W~~~~ 1

fcn

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To demonstrate that light is necessaryfor photosynthesis, the experimental pottedplant iskept in darkness at leastfor :-(a) 6hours (b) 24hours (c) 48hours (d) 100hours

39. tSl ~ 31~ -q , ~ Cf i1~ Cfi1~ ~ ~ ~ ~ w :W r ~ ~ - ;: f t: t f? ;Q : ~ % I 1& % ' 00Sf)l1-q~ ~ I(i) ~CCRIT Cf i1~Cfi1~'R~*~~1(ii) ~'R~*r@ r(vHHl'i 'R~~c8~cnirl(iii) ~~ -q ~ f

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Group Amarked itas - Stoma, chloroplast and epidermal cell respectivelyGroup B marked it as - Guard cell, chloroplast and epidermal cell respectivelyGroup Cmarked it as- Guard cell, nucleus and epidermal cell respectivelyGroup Dmarked itas- Guard cell, chloroplast and epidermal cell respectivelyCorrect labelling was marked by :(a) A (b) B (c) C (d) D

41. '~~ ~ ~ ~ &mC02~ mmt~~~~~W:W~WICfl 'B e 1311 :r -q ~ ~ '1c \T 2t 00 ~ fWIT T f

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(b) KOH~~~d~~~~~1(c) KOH~d~wcn, ~~d~"karqCfT