Question

Some IT practicals for class 10
CBSE ​

Answer 1

Answer:

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 (dilute HC1 & dilute NaOH) by their

reaction with

i) Litmus solution (Blue/Red)

ii) Zinc metal

iii) Solid Sodium Cabonate

3. To determine the focal length of a

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, angle of

emergence and interpret the results.

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 peel to show 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.

8

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 result.

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

Explanation: