Science questionpapersa2 2012

086/IX/SA2/29/B1
Class - IX
SCIENC
E
Time : 3 to 3½ hours Maximum Marks : 80
Total No. of Pages :
12
General Instructions :
1.The question paper comprises of two sections, A and B. You are to
attempt both the sections.
2.All questions are compulsory.
3.There is no overall choice. However, internal choice has been provided
in all the three questions
of five marks category. Only one option in such question is to be
attempted.
4.All questions of section A and all questions of section B are to be
attempted separately.
5.Question numbers 1 to 4 in section A are one mark questions. These are
to be answered in
one word or one sentence.
6.Question numbers 5 to 13 are two mark questions, to be answered in
about 30 words.
7.Question numbers 14 to 22 are three mark questions, to be answered in
about 50 words.
8.Question numbers 23 to 25 are five mark questions, to be answered in
about 70 words.
9.Question numbers 26 to 41 in section B are multiple choice questions
based on practical
skills. Each question is a one mark question. You are to choose one
most appropriate response
out of the four provided to you.
10. An additional 15 minutes time has been allotted to read this question
paper only. During
this interval you are not to write any thing on the answer book.
.
SECTION - A
1.
2.
3.
4.
5.
Define 1 W of power.
Why is air called breath of life.
When is work done by a force zero.
How is CO2 fixed in the atmosphere.
Calculate number of moles in 34 g of NH3
(Given atomic mass of N 5 14 u ; H 5 1 u ) ?
(a)
(b)
Give a difference between lizards and snakes.
Name the type of nutrition in fungi.
1
1
1
1
2
6. 1
1
2
2
2
2
7.
8.
9.
10.
Why is a bucket of water lighter when in water than when it is taken out of water.
Draw a graph showing a person with soft and loud voice.
How do forest play an important role in maintaining water cycle.
Write chemical formulas of :
(a) Sodium Carbonate
(b) Ammonium Chloride
Thallophyta, bryophyta and pteridophyte are classified as cryptogamae whereas
gymnosperms and angiosperms are classified as phanerogamae, why ?
(a)
(b)
Differentiate between upthrust and weight
When does an object float or sink.
11. 2
12. 1
1
2
3
13.
14.
Name the two ways of preventing water pollution.
To which group do the following organism belong and give one reason for each.
(a) Cyanobacteria(b) Euglena(c) Ulothrix
Calculate number of atoms in 120 g of Ca :
(atomic mass of Ca 5 40 u)
(a)
(b)
What is immunization.
Categorise the following into acute / chronic / infectious / non infectious diseases :
typhoid, TB, GOITRE, Elephantiasis.
15. 3
16. 1
2
086/IX/SA2/29/B1 2

17. (a)
(b)
(a)
(b)
19. (a)
(b)
Define the term molecular mass.
State and explain law of conservation of mass with example.
A truck and a car are running with same velocity. Which of the two has less
kinetic energy ?
Give an example of electrical energy converted into light energy.
State a condition for an echo to be heard.
Bats cannot see then how do they catch their Prey.
1
2
2
1
1
2
3
AIDS (c) Malaria
3
18.
20. Give cause and remedy of :
(a) Hepatitis(b)
21. A sound wave travels at a speed of 339 m/s ‘ if the wavelength is 1.2 cm, what is the
frequency of the wave.
What are the different means by which infectious diseases can spread.
(a)
(b)
The K. E of an object of mass m, moving with a velocity 5 m/s is 25 J. What will
be its K. E when its velocity is doubled and tripled.
An object of mass 12 kg is at a certain height above the ground. If the P. E of the
object is 480 J, find the height at which the object is w. r. t the ground.
(Given g 5 10 m/s2)
OR
Define K. E and drive the expression for K. E ?
A man weighing 70 kg carries a weight of 10 kg to the top of tower 100 m high.
Calculate the work done.
Write the symbol and name of the element having 14 proton.
Complete the table.
22.
23.
3
3
2
(a)
(b)
3
2
24. (a)
(b)
1
3
Element Atomic No Mass No
Cl17-
Si-28
F--
(c)
(a)
(b)
Proton
-
-
9
Neutron
18
-
10
1
3
2
Give one draw back of Rutherford model.
OR
The average atomic mass of a sample of an element X is 16.2u. What are the
percentage of isotope 16X8 and 18X8 in the sample.
On the basis of Thomson’s model of an atom explain how the atom is neutral as
a whole.
Draw nitrogen - cycle.
Why step farming is common in hills.
OR
Differentiate between Biodegradable and Non biodegradable substances.
How is acid rain causing harm to ‘Taj Mahal’.
What is Smog.
3
25. (a)
(b)
(a)
(b)
(c)
4
1
3
1
1
086/IX/SA2/29/B1

SECTION - B
26. Non - flowering plants belongs to :
(a)
27.
Cryptogam (b) Phanerogams (c) dicots (d) monocots
1
1
The correct way of reading the liquid level is shown in :
(a)
28.
fig A (b) fig B (c) fig C (d) fig D
1While determining the density of copper piece using spring balance and a measuring
cylinder Nitin carried out the following procedure :
(i)
(ii)
(iii)
(iv)
Noted the water level in the measuring cylinder without the copper piece.
Immersed the copper piece in the water
Noted the water level in the measuring cylinder with the copper piece inside it.
Removed the copper piece from the water and immediately weighed it using a
string balance.
step i (b) step ii (c) step iii (d) step iv
the wrong step in the produce is :
(a)
29. Form measuring cylinders with different least counts are shown in fig A, B, C and D.
The most suitable cylinder for determining the volume of a cube of side nearly 1 cm is :
1
(a)
30.
A (b) B (c) C (d) D
1Which of the following is not an amphibian :
(a) Sea - anemone (b) Frog
4
(c) toad (d) Hyla
086/IX/SA2/29/B1

31. Three students A, B and C determined volume of a solid by immersing it in water in the
over flow cans set up as shown. The result obtained will be wrong for.
1
(a)
(c)
32.
student A
student C
(b)
(d)
student B
all the three students.
1The correct experimental set up for determining the mass of a solid in water is shown
in fig :
(a)
33.
A (b) B (c) C (d) D
1The correct position of the ear of the observer is shown in :
A B
C
(a) A (b) B
5
(c)
D
C (d) D
086/IX/SA2/29/B1

34. Non - green saprophytic plant is :
(a) Marsilea(b) Marchantia
1
(c) Paramecium (d) Rhizopus
135. When a body sinks in a liquid the weight of the body is :
(a) More than the volume of body
(b) Less than the volume of body
(c) Less than the buoyant force
(d) More than the buoyant force
Which of the following show aquatic adaptation.
(a) Snake(b) fish(c) Bacteria
The
(a)
(b)
(c)
(d)
wave pulse can be produced on a rope whose one end is fixed :
By giving a single jerk to the other end.
By giving more jerks to the other end.
By giving continues jerks.
Either (a) or (b) or (c)
36. 1
(d) toad
137.
38. To observe and compare the pressure exerted by solid cuboid in its up right position,
student A placed the cuboid gently on the loose sand while B placed it on the surface of
table top. Who will observe the exerted pressure by cuboid easily ?
(a) Student A only(b) Student B only
(c) Both student A and B(d) Neither A nor B.
Cells of bacteria contain :
(a) cell wall
(c) both (a) and (b)
1
39. 1
(b)
(d)
chromatin fibre
may be (a) or (b)
140. In the experiment for determining the velocity of a pulse propagating along the length
of string we prefer a long thick cotton string :
(a) Because pulse can not be formed in a thin short string.
(b) Because cotton string is cheap and easily available
(c) So that pulse move through it easily
(d) So that time taken by pulse to move from one end of string to other may be
accurately determined.
Which of the following is a warm - blooded animal :
(a) Liver - fluke(b) Human being
(c) Draco(d) Salamander
41. 1
-o0o-
086/IX/SA2/29/B1 6

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CBSE sample papers, Question papers, Notes for Class 6 to 12
16. (a)
(b)
ÅUè·¤æ·¤ÚU‡æ €Øæ ãñ?
çÙ€ÙçÜç¹Ì ·¤æð Ìèßý /Îèƒæü·¤æçÜ·¤/â´R¤æ×·¤/¥â
´R¤æ×·¤
ÚUæð»æð´ ×ð´
Ÿæð‡æè Õh ·¤èçÁ°
Ñ
1
2
ÅUæØÈ¤æ§ÇU, ÅUèÕè, »æØÅUÚU,
°çÜ$Èð¤ÙÅUæ§çââÐ
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(b)
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ÂçÚUÖæçáÌ ·¤èçÁ°Ð©ÎæãÚU‡æ âçãÌ ÎýÃØ×æÙ â´ÚUÿæ‡æ ·ð¤ çÙØ× ·¤æð
SÂC ·¤ÚUæðÐ
1
2
318. (a)
(b)
°·¤ ÅþU·¤ ÌÍæ °·¤ ·¤æÚU â×æÙ ßð» âð »çÌ×æÙ ãñ´Ð §Ù×ð´ ç·¤â·¤è »çÌÁ
ª¤Áæü ·¤× ãæð»è?
çßléÌ ª¤Áæü ·¤æ Âý·¤æàæ ª¤Áæü ×ð´ M¤Âæ‹ÌÚU‡æ ·¤æ °·¤ ©ÎæãÚU‡æ ÎæðÐ
19. (a)
(b)
ç·¤âè ÂýçÌŠßçÙ ·¤æð âéÙÙð ·ð¤ çÜ° °·¤ àæÌü ÕÌæ¥æðÐ 1
2
3
¿×»æÇ¸Î Îð¹ Ùãè´ â·¤Ìð, Ìæð ßã ¥ÂÙæ
çàæ·¤æÚU ·ñ¤âð Â·¤Ç¸Ìð ãñ´?
×ÜðçÚUØæ
20. ·¤æÚU‡æ ÌÍæ çÙÎæÙ ÕÌæ¥æð
Ñ
(a) ÂèçÜØæ (b) AIDS °Ç÷Uâ (c)
21.
22.
23.
°·¤ ŠßçÙ ÌÚÚ» 339 m/s ·¤è ¿æÜ âð »çÌ×æÙ ãñ, ØçÎ ÌÚÚ» ÎñŠØü 1.2 cm ãñ, ÌÕ ÌÚÚ» ·¤è ¥æßëç€æ
€Øæ ãæð»è?
3
3â´R¤æ×·¤ ÚUæð»æð´ ·ð¤ Èñ¤ÜÙð ·ð¤
çßçÖóæ ÌÚUè·ð¤ €Øæ ãñ´?
(a)
(b)
ç·¤âèm ÎýÃØ×æÙ ·¤è ßSÌé 5 m/s ·ð¤ ßð» âð »çÌ×æÙ ãñ, ·¤è »çÌÁ ª¤Áæü 25 J ãñÐ ÁÕ ßð» ·¤æð Îé»Ùæ
2+3=5
ÌÍæ çÌ»éÙæ ç·¤Øæ ÁæÌæ ãñ Ìæð »çÌÁ ª¤Áæü €Øæ ãæð»è?
12 kg ÎýÃØ×æÙ ·¤è ·¤æð§ü ßSÌé Âë‰ßè âð ·é¤ÀU ª¡¤¿æ§ü ÂÚU ãñ, ØçÎ ßSÌé ·¤è çSÍçÌÁ
ª¤Áæü 480 J ãñ Ìæð§â·¤è Âë‰ßè âð ª¡¤¿æ§ü ™ææÌ ·¤ÚUæðÐ (g 5 10
m/s2)
¥Íßæ
(a)
(b)
»çÌÁ ª¤ÁæüU ·¤è ÂçÚUÖæáæ çÜ¹æð ÌÍæ »çÌÁ ª¤ÁæüU ·ð¤ çÜØð ÃØ
´Á·¤ SÍæçÂÌ ·¤ÚUæðÐ
»‡æÙæ ·¤èçÁ°Ð
3+2=5
ØçÎ 70 kg ÖæÚU ·¤æ ÃØçQ¤ 10 kg ÖæÚU Üð·¤ÚU 100 m ª¡¤¿ð ÅUæßÚU ÂÚU ¿É¸Ìæ
ãñ Ìæð ç·¤Øð »Øð ·¤æØü ·¤è
24. (a)
(b)
14 ÂýæðÅUæÙ ßæÜð Ìˆß ·¤æ ÂýÌè·¤ ÌÍæ Ùæ×
çÜ¹æðÐ
1
3âæÚU‡æè ·¤æð
ÂêÚUæ ·¤ÚUæð
²nÅ
Cl
Si
F
¨ÀY½ÌmÌÏÆVŠ½Ìš€Š
´ã©¾½Ì¿ÆÈšg¾Ì
17-
-28
--
¨ãÌ«YÌ¿Ö
-
-
9
q¾Ð«Yä Ì¿
18
-
10
(c) ÚUÎÚUÈ¤æðÇüU ×æòÇUÜ ·¤è °·¤ ·¤×è çÜ¹æðÐ
¥Íßæ
8
1
086/IX/SA2/29/B1
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(a)
(b)
25. (a)
(b)
ç·¤âè Ìˆß ·ð¤ Ù×êÙð
ÂýçÌàæÌÌæ ™ææÌ ·¤èçÁ°Ð
Íæ×âÙ ·ð¤ ÂÚU×æ‡æé ×æòÇUÜ ·ð¤ ¥æÏæÚU ÂÚU SÂC
·¤ÚUæð ç·¤ ÂÚU×æ‡æé ©ÎæâèÙ ãæðÌæ ãñÐ
Ùæ§ÅþUæðÁÙ ¿R¤ ·¤æ ¥æÚðU¹
ÕÙæ§°Ð
X ·¤æ ¥æñâÌ ÂÚU×æ‡æé ÖæÚU 16.2 u ãñÐ §â Ù×êÙð ×ð´ 16X8 ÌÍæ 18X8
â×SÍæçÙ·¤æð´
·¤è 3
2
4
ÂãæÇ¸æð´ ×ð´ âèÉ¸è Ùé×æ ¹ðÌè €Øæð´
âæ×æ‹Ø ãñ?
¥Íßæ
1
(a)
(b)
(c)
Áñß çÙ€Ùè·¤ÚU‡æ ÌÍæ ¥ÁñßçÙ€Ùè·¤ÚU‡æ
ÂÎæÍæðZ ×ð´ ¥‹ÌÚU SÂC ·¤èçÁ°Ð
3
1
1
¥€ÜèØ ßáæü ÒÌæÁ ×ãÜÓ ·¤æð
·ñ¤âð ãæçÙ Âã¡é¿æ ÚUãè ãñ?Ïê×-·¤æðãÚUæ
€Øæ ãñ?
¹‡ÇU - Õ
26. çÕÙæ-ÂécÂ ßæÜð ÂæñÏð â€Õç‹ÏÌ ãñ Ñ 1
(a)
27.
çR¤ÂÅUæð»ñ× (b) Èñ¤ÙÚUæð»ñ
×
(c) çmÕèÁÂ€æè (d) °·¤ÕèÁÂ€æè
1ÎýßÌÜ ·ð¤ ÂæÆ÷UØæ´·¤ ·¤æ âãè ÌÚUè·¤æ çÎ¹æØæ
»Øæ ãñ Ñ
(a)
28.
ç¿˜æ A (b) ç¿˜æ B (c) ç¿˜æ C (d) ç¿˜æ D
1çÙçÌÙ Ùð ·¤×æÙèÎæÚU ÌéÜæ ÌÍæ ×æÂ·¤ çâçÜ´ÇUÚU ·¤æ ÂýØæð» ·¤ÚU·ð¤ Ìæ¡Õð ·ð¤ ÅéU·¤Ç¸ð ·ð¤ ƒæÙˆß çÙÏæüÚU‡æ ·ð¤ çÜ°
çÙ€ÙçÜç¹Ì çßçÏ ¥ÂÙæØè Ñ
(i)
(ii)
(iii)
(iv)
çÕÙæ Ìæ¡Õð ·ð¤ ÅéU·¤Ç¸ð ·ð¤ ×æÂ·¤ çâçÜ´ÇUÚU ×ð´ ÂæÙè ·¤æ ÌÜ ÙæðÅU ç·¤ØæÐ
ÂæÙè ×ð´ ·¤æÂÚU (Ìæ¡Õð) ·¤æ
ÅéU·¤Ç¸æ ÇéUÕæØæÐ
×æÂ·¤ çâçÜ´ÇUÚU ×ð´ Ìæ¡Õð ·ð¤ ÅéU·¤Ç¸ð ·ð¤ âæÍ
ÂæÙè ·¤æ ÌÜ ÙæðÅU ç·¤ØæÐ
ÂæÙè âð ·¤æÂÚU ·ð¤ ÅéU·¤Ç¸ð ·¤æð çÙ·¤æÜ·¤ÚU ÌéÚU‹Ì ·¤×æÙèÎæÚU
ÌéÜæ ÂÚU §â·¤æ ÖæÚU çÜØæÐ
§â çßçÏ ×ð´ »ÜÌ ÂÎ ãñ
ÂÎ i (b)(a) ÂÎ ii
9
(c) ÂÎ iii (d) ÂÎ iv
086/IX/SA2/29/B1

29. çßçÖóæ ¥ËÂÌ× ×æÂ ·ð¤ ¿æÚU ×æÂ·¤ çâçÜ´ÇUÚU
ƒæÙ ·¤æ ¥æØÌÙ çÙÏæüÚU‡æ ·¤ÚUÙð ·ð¤ çÜØð âÕâð
©ÂØéQ¤ ×æÂ·¤ çâçÜ´ÇUÚU ãñ Ñ
A, B, C ÌÍæ D ç¿˜æ ×ð´ çÎ¹æØð »Øð ãñ´Ð 1 cm ÖéÁæßæÜð 1
(a)
30.
A (b) B (c) C (d) D
1çÙ€Ù ×ð´ âð ·¤æñÙ ÁÜ-SÍÜ ¿ÚU Ùãè´ ãñ?
(a)
31.
â×éÎýè-
°ðÙè×æðÙ
(b) ×ðÉ¸·¤ (c) ÅUæðÇU (d) ãæ§Üæ
1¥æŒÜæß Âæ˜æ ·¤æ ÂýØæð» ·¤ÚU·ð¤ ÂæÙè ×ð´ ÇéUÕæØð
ãé° ÆUæðâ ·¤æ ¥æØÌÙ ™ææÌ ·¤ÚUÙð ·ð¤ çÜ° ÌèÙ ÀUæ˜ææð´
A, B ÌÍæ C
Ùð ç¿˜æ ×ð´ çÎ¹æ° ¥ÙéâæÚU ÂýØæð» âðÅU ç·¤ØæÐ Âýæ#
ÂçÚU‡ææ× »ÜÌ ãæð»æÐ
(a)
(c)
32.
ÀUæ˜æ A ·¤æ
ÀUæ˜æ C ·¤æ
(b)
(d)
ÀUæ˜æ B ·¤æ
âÖè ÌèÙæð
ÀUæ˜æ ·¤æ
1ç·¤âè ÆUæðâ ·ð¤ ÂæÙè ×ð´ ÎýÃØ×æÙ çÙÏæüÚU‡æ ãðÌé âãè ÂýØæð» ç·¤â ç¿˜æ ×ð´ ÎàææüØæ »Øæ ãñ?
(a) A (b) B
10
(c) C (d) D
086/IX/SA2/29/B1

33. ŸææðÌæ ·ð¤ ·¤æÙ ·¤è âãè çSÍçÌ ç·¤â ç¿˜æ ×ð´ ÎàææüØè »Øè ãñ? 1
A B
C
(a)
34.
A (b) B (c)
D
C (d) D
1¥-ãçÚUÌ ×ëÌæðÂÁèßè
´ ÂæñÏæ ãñ Ñ(a) ×æÚUâèçÜØ
æ
(b) ×·ðZ¤çàæØ
æ
(c) ÂðÚUæ×èçàæØ
×
(d) ÚUæ§ÁæðÂâ
35. ÁÕ ·¤æð§ü ßSÌé Îýß ×ð´ ÇéUÕÌè ãñ
Ìæð ßSÌé ·¤æ ÖæÚU Ñ(a)
(c)
1
(b)
(d)
ßSÌé ·ð¤ ¥æØÌÙ âð ¥çÏ·¤
©ˆÂÜæßÙ ÕÜ âð ·¤×
ßSÌé ·ð¤ ¥æØÌÙ âð ·¤×
©ˆÂÜæßÙ ÕÜ âð ¥çÏ·¤
136. çÙÙçÜç¹Ì ×ð´ âð ·¤æñÙ ÁÜèØ ¥Ùé·ê¤ÜÌæ ·¤æð çÎ¹æÌæ ãñ?
(a)
37.
âæ¡Â (b) ×ÀUÜè (c) Áèßæ‡æ
é
(d) ÅUæðÇU
°·¤ ÚUSâè ·¤æ çÁâ·¤æ °·¤ çâÚUæ çSÍÚU ãñ, âð °·¤ ÌÚ´U»-SÂ´Î ©ˆÂóæ
·¤è Áæ â·¤Ìè ãñ Ñ
(a)
(c)
1
ÎêâÚðU çâÚðU âð °·¤ ÛæÅU·¤æ
Îð·¤ÚU
(b)
(d)
ÎêâÚðU çâÚðU ÂÚU ¥çÏ·¤ ÛæÅU·ð¤
Îð·¤ÚU
Ü»æÌæÚU
ÛæÅU·ð¤ Îð·¤ÚU
ÌèÙæð´ (a), (b) Øæ (c)
138. ÆUæðâ ƒæÙæÖ mæÚUæ ª¤ÂÚU ·¤è çÎàææ ×ð´ Ü»æØð »Øð ÎæÕ ·¤æ Âýðÿæ‡æ ·¤ÚUÙð ÌÍæ
ÌéÜÙæ ·¤ÚUÙð ·ð¤ çÜ°, ÀUæ˜æ A Ùð ƒæÙæÖ
·¤æð ÏèÚðU âð ÚðUÌ ÂÚU ÚU¹æ ÁÕç·¤ ÀUæ˜æ B Ùð ×ðÁ ·¤è âÌã ·ð¤ ª¤ÂÚU ÚU¹æÐ ƒæÙæÖ
mæÚUæ Ü»æØð »Øð ÎæÕ ·¤æð ·¤æñÙ
¥æâæÙè âð çÙÚUèÿæ‡æ ·¤ÚðU»æ?
(a)
(c)
·ð¤ßÜ ÀUæ˜æ A
ÎæðÙæð´ ÀUæ˜æ A ÌÍæ
B
(b)
(d)
·ð¤ßÜ ÀUæ˜æ B
©ÂÚUæðÌ ×ð´ âð ·¤æð§ü
Ùãè´
139. ÕñÅUèçÚUØæ ·¤è
·¤æðçàæ·¤æ°´ ÚU¹Ìè ãñ´ Ñ
(a)
(c)
·¤æðçàæ·¤æ
çÖçæ
(a) ÌÍæ (b) ÎæðÙæð´
(b)
(d)
11
R¤æð×ðçÅUÙ
Ì‹Ìé
(a) Øæ (b)
086/IX/SA2/29/B1

40. ÌæÚU âð ãæð·¤ÚU »×Ù ·¤ÚUÙð ßæÜð SÂ´Î ·¤æ ßð» çÙÏæüçÚUÌ ·¤ÚUÙð ßæÜð ÂýØæð» ×ð´ ã×
ÜÕè ×æðÅUè ·¤ÂÇðU ·¤è ÇUæðÚUè ·¤æð
ÂýæÍç×·¤Ìæ ÎðÌð ãñ´ Ñ
(a)
(b)
(c)
(d)
1
Øæð´ç·¤ ÂÌÜè ÀUæðÅUè ÇUæðÚUè ×ð´ SÂ´Î
Ùãè´ ÕÙ â·¤ÌèÐ
Øæð´ç·¤ ·¤ÂÇ¸ð ·¤æð ÇUæðÚUè âSÌè ÌÍæ ¥æâæÙè âð
©ÂÜÏ ãñÐ
Ìæç·¤ SÂ´Î §ââð ¥æâæÙè âð »çÌ ·¤ÚU
â·ð¤Ð
Ìæç·¤ SÂ´Î ·¤æð ÇUæðÚUè ·ð¤ °·¤ çâÚðU âð ÎêâÚðU çâÚðU Ì·¤ »çÌ ·¤ÚUÙð ×ð´ Ü»ð â×Ø ·¤æð
âãè É¸´» âð çÙÏæüçÚUÌ ç·¤Øæ
Áæ â·ð¤Ð
1
(c)
41. çÙÙçÜç¹Ì ×ð´ âð ·¤æñÙ â× ÌæÂè (ª¤c‡æ ÌæÂè) Á‹Ìé ãñ?
(a) ÜèßÚU
Üê·¤
(b) ×ÙécØ ÇðþU·¤æ
ð
(d) âðÜæ×ð
´ÇUÚU
-o0o-
086/IX/SA2/29/B1 12

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