Resumo de 10th Class Deleted And Revised Portion

Unit Revised Weightage
(Marks)
1. Chemical Reactions and
Some important Chemical compounds 06
2. Energy 17
3. Life Processes 17
4. Natural Resources 14
5. Our Environment 03
6. Exploring Space 03
Total -----------------
60
------------------
The following sub-topics/ content areas of the syllabus may
be considered as deleted:
Unit 1 : Chemical Reactions
pH scale : only qualitative treatment to be done.
Unit 2 : Energy
? Derivation of mirror formula
? Derivation of lens formula
? Construction and working of Compound microscope and an
astronomical telescope
? Mathematical equations of Faraday?s laws, electro-
chemical cells, dry cells.
? Electric motor and electric generator (D.C)
? Non-renewable sources-fossil fuels ( coal, petroleum and
natural gas), conditions of
combustion, choice of a good fuel and efficient use of
fuels.
Unit 4 : Natural Resources :
? Preparation, properties and uses of hydrogen
? Some common synthetic polymers, soaps and detergents
Unit 6 : Exploring space:
Solar system, planets, asteroids, comets and meteors, earth-
evolution and structure,
stars, constellations
LIST OF EXPERIMENTS
Every student will be required to perform following fifteen
experiments during
the academic session.
1. To find the pH of the following samples by using pH
paper/universal indicator.
i) Dilute Hydrochloric acid
ii) Dilute NaOH solution
iii) Dilute Ethanoic acid solution
iv) Lemon juice
v) Water
vi) Dilute Sodium Bicarbonate Solution.
2. To study the properties of acids and bases (Dil. HCl &
Dil. NaOH) by their reaction
with
i) Litmus solution (Blue/Red)
ii) Zinc metal
iii) Solid Sodium Carbonate
3. To determine the focal length of
a) Concave mirror
b) Convex lens
by obtaining the image of a distant object.
4. To trace the path of a ray of light passing through a
rectangular glass slab for
different angles of incidence. Measure the angle of
incidence, angle of refraction and
angle of emergence and interpret the result.
5. To study the dependence of current (I) on the potential
difference (V) across a
resistor and determine its resistance. Also plot a graph
between V and I.
6. To determine the equivalent resistance of two resistors
when connected in series.
7. To determine the equivalent resistance of two resistors
when connected in parallel.
8. To prepare a temporary mount of a leaf to show its
stomata.
9. To show experimentally that light is necessary for
photosynthesis.
10. To show experimentally that carbon-dioxide is given out
during respiration.
11. To study a) binary fission in Amoeba and (b) budding in
yeast with the help of
prepared slides.
12. To determine the percentage of water absorbed by
raisins.
13. To prepare SO2 gas, observe its following properties
and draw inferences in respect
of
i) odour
ii) solubility in water
iii) effect on litmus paper
iv) action on acidified potassium dichromate solution.
14. a) To observe the action of Zn, Fe, Cu and Al metals on
the following salt solutions-
i) ZnSo4 (Aq)
ii) FeSO4 (aq.)
iii) CuSO4 (aq.)
iv) Al2 (SO4 )3 (aq.)
b) Arrange Zn, Fe, Cu and Al metals in the decreasing order
of reactivity based on
the above results.
15. To study the following properties of acetic acid
(ethanoic acid):
i) odour
ii) solubility in water
iii) effect on litmus
iv) reaction with sodium bicarbonate

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