(i) The question paper comprises two sections, A and B. You are to attempt
both the sections.
(ii) All questions are compulsory.
(iii) All questions of Section-A and B are to be attempted separately.
(iv) There is an internal choice in two questions of three marks each and one
question of five marks.
(v) Question numbers 1 and 2 in Section-A are one mark question. They are to be
answered in one word or in one sentence.
(vi) Question numbers 3 to 5 in Section- A are two marks questions. These are to
be answered in 30 words each.
(vii) Question numbers 6 to 15 in Section-A are three marks questions. These are
to be answered in about 50 words each.
(viii) Question numbers 16 to 21 in Section-A are 5 marks questions. These are
to be answered in 70 words each.
(ix) Question numbers 22 to 27 in Section- B are based on practical skills. Each
question is a two marks question. These are to be answered in brief.
SECTION – A
||Give an example of a flower which contains both stamens and carpels.
||Mention any one point of difference between Pepsin and Trypsin
||An element “X” has mass number 35 and the number of neutrons, is 18.
Identify the group number and period of “X”
||An object of height 1.2m is placed before a concave mirror of focal
length 20cm so that a real image is formed at a distance of 60cm from
it. Find the position of an object. What will be the height of the image
||Why is there a need to harness non-conventional sources of energy?
Give two main reasons.
||Name the electric device that converts mechanical energy into
electrical energy. Draw the labelled diagram and explain the principle
involved in this device.
i) What is the function of earth wire in electrical
ii) Explain what is short circuiting an electric supply.
iii) What is the usual current rating of the fuse wire in the
line to feed (a) Lights and fans? (b) Appliances of 2kW or more power?
||Draw a circuit diagram of an electric circuit containing a cell, a
key , an ammeter , a resistor of 4Ω in series with a combination of two
resistors (8Ω each) in parallel and a voltmeter across parallel
combination. Each of them dissipate maximum energy and can withstand a
maximum power of 16W without melting. Find the maximum current that can
flow through the three resistors.
||In the electrolysis of water,
a) Name the gas collected at anode and cathode
b) Why is the volume of gas collected at one electrode double
than the other?
c) What would happen if dil H2SO4 is not added to water?
||Differentiate between the arrangement of elements in Mendeleev’s
periodic table and Modern periodic table.
||Explain the ways in which glucose is broken down in absence of
List three differences between arteries and veins
||How do Mendel’s experiments show that traits may be dominant or
||Rohit focused the image of a candle flame on a white screen using a
convex lens. He noted down the position of the candle , screen and lens
as under :
Position of candle = 26.0 cm
Position of convex lens = 50.0 cm
Position of screen = 74.0 cm
i) What is the focal length of the convex lens?
ii) Where will the image be formed if he shifts the candle
towards the lens at a position of 38 cm?
iii) Draw a ray diagram to show the formation of the image in
case (ii) as said above?
||“pH has a great importance in our daily life” explain by giving
A compound which is prepared from gypsum has the property of
hardening when mixed with a proper quantity of water. Identify the
compound and write its chemical formula. Write the chemical equation for
its preparation. Mention any one use of the compound.
||Why are fossils considered important in the study of evolution?
Explain two ways by which age of fossils can be estimated.
||Our government launches campaigns to provide information about AIDS
prevention, testing and treatment by putting posters, conducting radio
shows and using other agencies of advertisements.
a) To which category of diseases AIDS belong? Name its
b) Which kind of value is government trying to develop in the
citizens by conducting the above kind of programs.
||With the help of a labelled circuit diagram wire describe an
activity to illustrate the pattern of the magnetic field lines around a
straight current carrying long conducting wire .
i) Name the
rule that is used to find the direction of magnetic field associated
with a current carrying conductor.
ii) Is there a similar magnetic field produced around a thin
beam of moving (a) alpha particles and (b) neutrons? Justify your
||You are given balls and stick model of six carbon atoms and fourteen
hydrogen atoms and sufficient number of sticks. In how many ways one can
join the models of six carbon atoms and fourteen hydrogen atoms to form
different molecules of C6H14.
Draw the structural formulae of all the possible isomers of the
compound with the molecular formula C3H6O and also give their electron
||a) i) Draw a neat diagram of human brain and
ii) Label Medulla and Cerebellum
iii) Write the functions of the above mentioned parts b)
”Both overproduction and underproduction of Growth
hormone leads to disorders in the body.” Explain
||Noopur needs a lens of power -4.5D for correction of her vision.
a) What kind of defect in vision is she suffering from?
b) What is the focal length and nature of the corrective lens?
c) Draw ray diagrams showing the (a) defected eye and (b)
correction for this defect.
d) What are the causes of this defect?
||a) What is reactivity series? How does the reactivity series of
metals help in predicting the relative activities of various metals?
b) Suggest different chemical processes used for obtaining a metal
from its oxides for metals in the middle of the reactivity series and
metals towards the top of the reactivity series. Support your answer
with one example each.
||a) “Improvements in our lifestyle have resulted in greater amounts
of waste generation.” Give two examples to support the given statement.
Suggest one change that we can incorporate in our lifestyle in order to
reduce nonbiodegradable waste.
b) The following organisms form a food chain. Insect, Hawk, Grass,
Snake, Frog Which of these will have highest concentration of
non-biodegradable chemicals? Name the phenomenon.
a) What do you understand by “Watershed Management”? List any two
advantages of watershed management.
b) “Human beings occupy the top level in any food chain.” What are
the consequences of this on our body?
SECTION – B
||What do you observe when you drop a few drops of acetic acid to a
test tube containing:
b) Universal indicator
c) distilled water
d) sodium hydrogen carbonate
||Riya performs two set of experiments to study the length of the foam
formed which are as follows:
Set I: she takes 10 ml of distilled water in test tube “A” and adds
5-6 drops of liquid soap in it and shakes the test tube vigorously.
Set II: she takes 10 ml of distilled water in a test tube “A” and
adds 5-6 drops of liquid soap with half spoonful of CaSO4 in it and
shakes the test tube. Write your observation and reason.
||A student observed a permanent slide showing asexual reproduction in
yeast. Draw diagrams of the observations he must have made from the
slide. Name the process also.
||A student conducted an experiment to show CO2 is released during
respiration. List two precautions that he/she must take for obtaining
|| The values of current I flowing in a given resistor for the
corresponding values of potential difference V across the resistor are
Plot a graph between V and I and calculate the resistance of
In a given ammeter, a student sees that needle
indicates 17 divisions in ammeter while performing an experiment to
verify Ohm’s law. If ammeter has 10 divisions between 0 and 0.5A, then
what is the value corresponding to 17 divisions?
||Draw a path of light ray passing through a prism. Label angle of
incidence and angle of deviation in the ray diagram.