CBSE Class 9 Answered

tenth std syiiabus for maths and science for sa1

Asked by sumeet kapgate | 08 Apr, 2011, 12:00: AM

Expert Answer

Theme : Materials (30 Periods)

Unit : Chemical Substances - Nature and Behaviour

Chemical reactions :

Acids, bases and salts :

Metals and non metals :

Theme : The world of The Living (20 Periods)

Unit : World of Living

Life Processes :

Theme : How things work. (32 Periods)

Unit : Effects of Current

Electric current, potential difference and electric current. Ohm's law; Resistance, Resistivity, Factors on which the

resistance of a conductor depends. Series combination of resistors, parallel combination of resistors and its applications

in daily life. Heating effect of Electric current and its applications in daily life. Electric Power, Inter relation between

P, V, I and R.

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Magnetic effects of current :

Theme : Natural Resources (8 periods)

Unit : Sources of energy

Different forms of energy, conventional and non-conventional sources of energy: fossil fuels, solar energy; biogas;

wind, water and tidal energy; nuclear energy. Renewable versus non-renewable sources

PRACTICALS

Practical should be conducted alongside the concepts taught in theory classes

FIRST TERM

1. To find the pH of the following samples by using pH paper/universal indicator.

a. Dilute Hydrochloric acid

b. Dilute NaOH solution

c. Dilute ethanoic acid solution

d. Lemon juice

e. Water

f. Dilute sodium bicarbonate solution.

2. To study the properties of acids and bases HCl & NaOH by their reaction with

a. Litmus solution (Blue/Red)

b. Zinc metal

c. Solid sodium carbonate

3. To study the dependence of potential difference (V) across a resistor on the current (I) passing through it and

determine its resistance. Also plot a graph between V and I.

4. To determine the equivalent resistance of two resistors when connected in series.

5. To determine the equivalent resistance of two resistors when connected in parallel.

6. To prepare a temporary mount of a leaf peel to show stomata.

7. To show experimentally that light is necessary for photosynthesis.

8. To show experimentally that carbon dioxide is given out during respiration.

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9. To perform and observe the following reactions and classify them into:

i. Combination reaction

ii. Decomposition reaction

iii. Displacement reaction

iv. Double displacement reaction

1) Action of water on quick lime.

2) Action of heat on ferrous sulphate crystals

3) Iron nails kept in copper sulphate solution

4) Reaction between sodium sulphate and barium chloride solutions

Magnetic field, field lines, field due to a current carrying conductor, field due to

current carrying coil or solenoid; Force on current carrying conductor, Fleming's left hand rule. Electro magnetic

induction. Induced potential difference, Induced current. Fleming's Right Hand Rule, Direct current. Alternating

current : frequency of AC. Advantage of AC over DC. Domestic electric circuits.

"living being". Basic concept of nutrition, respiration, transport and excretion in plants and animals.

Control and Co-ordination in Animals and Plants : Tropic movements in plants; Introduction to plant hormones;

control and co-ordination in animals : nervous system; voluntary, involuntary and reflex action, chemical co-ordination:

animal hormones.

Properties of metals and non-metals, reactivity series, formation and properties of ionic

compounds, basic metallurgical processes, corrosion and its prevention

Their definitions in terms of furnishing of H+ and OH- ions, General properties, examples

and uses, concept of pH scale(Definition relating to logarithm not required), importance of pH in everyday life;

preparation and uses of sodium hydroxide, Bleaching powder, Baking soda, washing soda and Plaster of Paris.

Chemical Equation, Balanced chemical equation, implications of a balanced chemical equation,

types of chemical reactions : combination, decomposition, displacement, double displacement, precipitation,

neutralization, oxidation and reduction.

Answered by | 18 May, 2011, 05:19: PM