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Model Test Paper (science): CBSE
science
Class : X
Time: 3.30 Hours M. M. : 90
General Instructions:
i. The questions paper comprises
of two sections, A and B you are to
attempt both sections.
ii. All questions are compulsory.
iii. All questions of section-A all
questions of section of section-B
are to be attempted separately.
iv.Question numbers 1 to 3 in
Sections-A are one mark each.
These are to be answered in one
word or in one sentence.
v. Question numbers 4 to 7 in
section-A are two marks each.
These are to be answer in about
30 words each.
vi. Question numbers 8 to 19 in
Sections-A are three marks each.
These are to be answered in about
50 words each.
vii. Question numbers 20 to 24 in
Sections-A are five marks each.
These are to be answered in about
70 words each.
viii.Question numbers 25 to 42
in section-B are multiple choice
questions based on practical
skills. Each questions in one mark
question. You are to select one
most appropriate response out of
the four provided to you.
Section – A
1. An element X forms an
oxide X2O3. In which group of
Mendeleev’s periodic table is this
element placed? [1]
2.What is genetic drift?
[1]
3.What is the main purpose of
rainwater harvesting? [1]
4.Explain the terms ‘self pollination
and ‘cross pollination’? How do the
insects helps in cross-pollution?[2]
5. A concave mirror produces three
times magnified real image of an
object placed 20 cm in front of it.
Where is the image formed? [2]
6.What is ten pen cent Law?
Explain with an example.
[2]
7.What are the three R’s to save
the environment? Explain with one
example of each.
[2]
8.a.What type of compound is
CH3COOH?
[3]
b.What substance should be
oxidized to prepare CH3 COOH?
c.What is the physical state of
CH3COOH?
9.What happen when:
[3]
a.Ethanol reacts with sodium
metal?
b.Ethanol reacts with alkaline
potassium permanganate solution?
c. Ethanol burns in air? Describe
with chemical equations.
10. a. Explain why, the first period
of the modern periodic table has
only two elements whereas second
period has eight elements. [3]
b. Why do elements in the same
group show similar properties but
the elements in different group show
different properties?
c. For each of the following triads, name
the element with the characteristics
specified below:
Elements Least
Chemically
atomic radius least reactive
(i) F, Cl Br …………
………….
(ii) Li, Na, K …………… ………..
11. Two elements X and Y belong to
group 1 and 2 respectively in the same
period of periodic table. Compare them
with respect to:
i. The number of valence electrons in
their atoms.
[3]
ii. Their valencies
iii. Metallic character
iv. The size of their atoms.
v. The formulae of their oxides.
vi. The formulae of their chlorides.
12. A worm X found in fresh water
and slow-moving streams has been
accidently cut into three pieces. It was
observed that in due course of times,
each cut piece of the worm develops to
become a complete worm by growing
all the missing parts. [3]
a. Name the worm X which can exhibit
this phenomenon of making complete
worm from its cut body parts.
b. Name another organism Y which
possesses the same characteristic of
growing fully form its cut body parts.
c. What is the name of this process in
which a complete organism is formed
from its cut body part.
Value based:
13. In most states of India, the birth
of girl is thought to be a curse and
economic load on the family. The
blame of birth of female baby is given
to mother. Therefore, the crimes of
killing women and female baby are
increasing day by day. In reality, this
thinking tendency even of educated
people keeps no meaning and is a
spot on the glooming face. Actually it is
father and not mother who determines
the sex of a new-born child. “The
sex of the new-born baby depends
on its father and not on its mother.”
Justify the statement and support your
answer with a neat illustration.[3]
14. The genotype of green stemmed
tomato plants is denoted as GG and
that of purple-stemmed tomato plants
as gg. When these two are crossed.
i. What colour of stem would you exec
tin their f1 progeny?
ii. Give the percentage of purpleStemmed plants in f1 plants are self
pollinated.
iii. In which ratio would you find the
genotypes GG and Gg in the F2
progeny?
[3]
15. A group of grass-hoppers-some
green and some brown lived in
grassland having dry bushes and dry
grass.
a. Which are would normally be picked
up by predatory birds and why?
b. Population of which grasshopper
will increase?
c. Name this phenomenon. [3]
16. a. Two lenses have power of (i)
+2D (ii) -4D. What is the nature and
focal length of each lens?
b. an object is kept at a distance of
the solution formed as:
100 cm form each of the above lenses.
Calculate the 9 i) image distance
a.green and transparent
(ii) magnification in each of the two
b.Pink and opaque
cases.
[3]
c.Yellow and transparent
17. With the help of a ray diagram, state
d.Colourless and transparent.
what is meant by refraction of light.
26.The cleaning capacity of soap is
State Snell’s law for refraction of light
stronger in:
and also express it mathematically.
a.hard water than soft water.
[3]
b.soft water than hard water.
18. With the help of diagram, explain
c.hard water if conc. H2SO4 is added
the formation of a rainbow in the sky.
to it.
Name the four phenomena involved
d.soft water if CaSO4 is added to it.
during rainbow formation.
[3]
27.In a saponification reaction for the
19. a. Name the major industries
preparation of soap, a student wants
which are based on forest produce.
to precipitate out soap from glycerol.
b. State the main aim of the
For this he should add the following
management of forests and wildlife.
compound to the mixture:
c. Name the four main stakeholders in
a.Sodium chloride
the management of forest resources.
b.Magnesium Sulphate.
[3]
c.Ethanol
20.
a. Why does Carbon form
d.Acetic acid
compounds mainly by covalent
28.On adding sodium bicarbonate to
bonding?
acetic acid, you immediately:
b. Why do covalent compounds have
a. observe strong effervescence.
low melting and boiling points?
b. hear hissing sound.
c. What is an ester? Describe an
c. get pungent smell.
activity to form an ester.
[5]
d.notice formation of bubbles.
21. a. Give an example of a bisexual
29.The odour of Ethanoic acid
flower. What is its female reproductive
resembles with:
part known as?
[5]
a.tomato juice
b.Kerosene
b. Draw a diagram of its longitudinal
section showing the process of
c.orange juice
germination of pollen on stigma and
d.Vinegar.
label the following on it:
30.Which of the following figures
i.Male germ cell
shows budding in yeast?
ii.Female germ cell
a. I
b. II
iii.Ovary
c. III
d. IV
iv.Pollen tube
c.Pollination may occur without
fertilization but fertilization will be take
place without pollination. Give reason.
22.Give reasons for the following:[5]
i.Why does menstruation occur?
ii.Why is it an advantage for the testes
31. The following figures illustrate
(in human male) to be situated in the
binary fission in Amoeba in an
scrotal sac outside the main body
incorrect sequence.
cavity?
iii. Why are spores covered with a hard
coverings.
iv. Why are the traits acquired during
the lifetime of an individual not
The correct sequence is:
inherited?
a. (i), (ii), (iii), (iv)
v. Why did Mendel choose pea plants
b.(ii), (iii), (iv), (i)
for studying inheritance?
b. (iv), (iii), (ii), (i)
23. Draw labelled diagram in each
d. (iii), (iv), (ii), (i)
of the following cases to show the
32. A student soaked the gram seeds
in water overnight to study different
position and nature of the image
formation when the object is placed. [5]
parts of embryo. The parts of the
a. at the centre of curvature of a
embryo that he would observe are:
concave mirror.
a.Cotyledon and plumule
b. between optical centre and focus
b. radicle and cotyledon
of a convex lens.
c. radicle and plumule
c. between F and 2F of a convex lens.
d. Seed and cotyledon.
24. State two main causes for
33. In Biology laboratory a student
developing near-sightedness in a
makes careful observation of forelimbs
person. A person with a myopic eye
of preserved specimen of a frog and
can not see objects beyond 2.0 m
bird. He will find that:
distinctly. What should be the power of
a. forelimbs of frog and bird have same
corrective lens used to restore proper
basic structure.
vision?
[5]
b. forelimbs of both have different
The sun can be seen for sometime
basic structure.
even when it is below the horizon.
c. forelimbs of both are equal in size.
Draw a diagram and explain why is
d. forelimbs of frog are soft but the
it so?
forelimbs of birds are hard.
34. A plumule develops into:
a. Shoot
b. root
c. nodules in rootsd. fruit
25. A student mixed some acetic acid
35. Which of the following is a convex
with water. He would have observed
lens?
Section – B
a. I
b. II
c. III
d. IV
36. A teacher asked a student to
trace the path of rays of light through
a glass prism. In order to perform
the experiment, he provided the
following set of materials: Glass
prism, a match box, pins, a drawing
sheet, a board.
Which of the above mentioned
material is not required in this
experiment?
a.Glass prism
b.Match box
c. Pins
d. Drawing sheet
37. Which of the following feature is
correct about a glass prism?
a. Two triangular bases and three
rectangular lateral surfaces.
b.Two triangular bases and two
rectangular lateral surfaces.
c. Two triangular bases and four
rectangular lateral surfaces.
d. Three triangular bases and three
rectangular lateral surfaces.
38. For finding the focal length of
convex lens by obtaining the image
of a distance object, one should use
as the object:
a.a well lit distant tree
b. Window grill in the classroom
c. any distant tree
d. a lighted candle kept at the other
side and of the table.
39. To find the focal length of a
concave mirror Ria focuses a
distant object with this mirror. The
chosen object should be:
a. a tree b. a building
c. a window
d. the sun
40. In these diagrams, the angle
of refraction r has been correctly
marked in which diagram?
a. II
b. I
c. IV
d. III
41. A student obtained a real,
inverted image of equal size of an
object by using a convex lens. The
object must be placed in front of
the convex lens at the following
position:
a. F
b. 2F
c. beyond 2F d. Between F and 2F
42. To find the focal length of a
concave mirror, Rakshita should
choose one of these following set
ups?
a. A mirror holder and a screen
holder.
b. A screen holder and a scale.
c. A mirror holder, a screen holder
and scale.
d. A screen, a mirror, holders for
them and a scale.
Prepared by: Mamta Gupta
Dalimiss Sunbeam School, Varanasi
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