- To Prepare
a) A true solution of common Salt and alum
b) A suspension of soil, chalk powder and fine sand in water
c) A colloidal of starch in water and egg albumin in water and distinguish
between these on the basis of
i)Transparency
ii)Filtration criterion
iii)Stability
-
To prepare
a) a mixture
b) a compound
using iron filings and sulphur powder and distinguish between these on the basis
of :
i) appearance i.e. homogeneity and heterogeneity
ii) behaviour towards a magnet
iii) behaviour towards carbon disulphide a solvant.
iv) effect of heat.
-
To study the extent of cooling caused by evaporation on the following liquids,
using a thermometer. Also to arrange these liquids in the increasing order of
the extent of cooling produced
i) Water
ii) Alcohol
iii) Ether
-
To verify laws of reflection of sound.
-
To determine the density of solid (denser than water) by using a spring balance
and a measuring cylinder.
-
To establish the relation between the loss in weight of a solid when fully
immersed in
i) tap water
ii) strongly salty water, with the weight of water displaced by it by taking at
least two different solids.
-
To measure the temperature of hot water as it cools and plot a temperature- time
graph.
-
To determine the velocity of a pulse propagated through a stretched
string/slinky.
-
To prepare stained temporary mounts of (a) onion peel and (b) human cheek cells
and to record observations and draw their labeled diagrams.
-
To identify parenchyma and sclerenchyma tissues in plants, striped muscle fibers
and nerve cells in animals, from prepared slides and to draw their labeled
diagrams.
-
To separate the components of a mixture of sand, common salt and ammonium
chloride (or camphor) by sublimation.
-
To determine the melting point of ice and the boiling point of water.
-
To observe the onion peel cells placed in hypertonic solution under the
microscope and draw labelled diagram of the same.
-
To study the characteristic of spirogyra/Agaricus, Moss/Fern, Pinus (either with
male of female cone) and an Angiospermic plant. Draw and give two identifying
features of groups they belong to.
-
To observe and draw the given specimens - earthworm, cockroach, bony fish and
bird. For each specimen, record
(a) one specific feature of its phylum
(b) one adaptive feature with reference to its habitat.
-
To find the pH of the following sample by using pH paper / universal indicator
i) Dilute Hydrochloric acid
ii) Dilute NaOH solution
iii) Dilute Ehanoic acid solution
iv) Lemon juice
v) Water
vi) Dilute sodium Bicarbonate Solution
-
To study the properties of acids and based HCI & NaOH by their reaction with
i) Litmus solution (Blue/Red)
ii) Zinc metal
iii) Solid Sodium Carbonate
-
To determine the focal length of
i) Concave mirror
ii) Convex lens
By obtaining the image of a distant object
-
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, angle of emergence and interpret the result.
-
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.
-
To determine the equivalent resistance of two resistors when connected in
series.
-
To determine the equivalent resistance of two resitors when connected in
parallel.
-
To prepare a temporary mount of a leaf peel to show stomata.
-
To show experimetally that light is necessary for photsynthesis.
-
To show experimetally that carbon dioxide is given out during respiration.
-
To study (a) binary fission in Amoeba and (b) budding in yeast with the help of
preapred slides.
-
To determine the percentage of water absorbed by raisins.
-
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 acidified potassium dichromatic solution.
-
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 result.
-
To study the following properties of acid (ethanoic acid) :
i) odour
ii) solubility in water
iii) effect on litmus
iv) reaction with sodium bicarbonat
