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-42TELANGANA SOCIAL WELFARE RESIDENTIAL EDUCATIONAL

SUMMATIVE ASSESSNIENT . I . SEPTEMBER 2OI4

X Classl

GENERAL SCIENCE - Paper I, (Physical Science)(EnglishVersion)

(Max. Marks: 40) " I Time z ZYzHlrs,

l. Answer the fottowing questions.

1. Derive an equation to find bpecific heat of a substance.

(oR) , '

4x4= 16

[Ttura O;ter

Derive the formula of curved mirrors.

2. Balance the following chemical equations'incruding physical

stites. :

.t

a) c6Hr2o6 - fiHuoH + co2

b) Fe + O, -+ FerO. - n:

(oR)

write the balanced chemical equations for the following

reactions , - ,

a) Zinc * Silver nitrate + zinc nitrate + silver.

b}Hydrogen.+chlorine-+Hydrogenchloride.

. 3. Explain refraction of light through a grass slab with a neat ray

didgram

.:

acid-chemicals and test tubes. How do you perform an,--- a-- I : -l

.'

experiment to prepare hydrogen. Draw'the,diagram of it. *

,{'

s -42 ,2

4. Answer these.

1 gm of water..,

IOOoC'

1gm of boiling

a) How much energy is transf-erred when

vapour at IOO0C condenses.to water at

b| How much energy is transferred when

water at40Ooc cools to water at OoC' '

(oR)

Definestrongacid,strongbase'.weakacid'weakbasewiththe

help of PH scale. r

ll. Answer att the fottowing questions in two or three sentences' 6x2 = 12

6. Write the differehc€s,between evaporation and boiling':

&'

7. Wh'en you place an object beyon 'C' infront of a cohcave mirror'

draw the ray diagram'of image formation'

8. What is chemical decomposition' Write an example' ,

9. Take a spoon in your hand see your face on both sides-what do

you observe.

give an examPle'1O. What is neutralization reaction

lll. A;nswer the foltowing guestions 7xl =7

11. What happens when a glass bottle completely filled with water

lkept'in deeP freezet.\

12. What is photochemical reaction'

{ 3. Give an example for oxidation' i

14. Write any two differences between a.cids and bases.

[Contd..on 3rd Page

{

.lrs15. What do yourknow about focus (F) of a sp.herical *irrort?*

";,42f

16. Define refraction. " '':ir:..,

17. Give two uses of baking soda.

lV. Filt in the blanks. Sxlz = 2Vz

'tl ..:-:

19. chemical reaction in which energy is absorbed to form a new, l:t, r7 :

compound is called

2o.Thegeometriccentreofthemirr6r;5--.---.-.-.

22. Relation between f and R is --------"-

Choose the conect answer.

23. The temperature of a steel rod is goo K. lts temperature,

inoCis=,-- , t I

18. lce floats on water because

" c) 59oC

b) 570C

d) 530c

24. FerO, + 2Al -+ AlrO. + 2Fe reaction is an

a) combinatibn b) decomposition

c} displacement d) dsuble.:decomposition

25. We $et a''diminished image with a concave mirror

a)AtF

. clA&.C

i.:..?i'

blberweenP&F

. , d) ber/-ond.C, .,

,:

'1,'

' 1xt/z = 2Az

" lTfurnover

',:fi

! 1' ,/.. .;:.rr.r::i,:"

':t: I ,. !

.l

solution ----: t I

.r I I

.a

.

: c) pink ' I d) ora,nge,

...].,]..27;MagnifidationJn_----.'.i uI I b) -.!t

t,tv

"r& d)5-"lu:-

I : 't

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