CBSE Class 10 Science

Topic	Replies	Views	Activity
An element 'X' has mass number 35 and the number of neutrons, is 18 class-10-science	1	956	April 5, 2019
1. In which direction does he move the lens to focus the flame on the screen? class-10-science	1	3908	April 5, 2019
Mention the essential material (chemicals) to prepare soap in the laboratory class-10-science	1	1076	April 5, 2019
In the experimental set up for determination of resistance of a given resistor class-10-science	1	535	April 5, 2019
A Zinc granule changes the colour of ferrous sulphate and an iron nail changes the blue colour of copper sulphate class-10-science	1	1464	April 5, 2019
With the help of labelled diagram, discuss the mechanism of respiration in human beings class-10-science	1	11120	April 5, 2019
Explain the given reactions with the examples: 1. Hydrogenation reaction class-10-science	1	2416	April 5, 2019
1. How do we classify elements? class-10-science	1	487	April 5, 2019
Give the steps involved in the extraction of metals of low and medium reactivity class-10-science	1	6653	April 5, 2019
What are the different methods of contraception? class-10-science	1	4162	April 5, 2019
1. How can you contribute as an individual or make a difference to the management of: class-10-science	1	1506	April 5, 2019
Energy from various sources is considered to have been derived from the Sun. Do you agree? class-10-science	1	606	April 5, 2019
What does the direction of thumb indicate in the right-hand thumb rule? class-10-science	1	1661	April 5, 2019
Two lamps, one rated 40 W at 220 V and the other 60 W at 220 V, are connected in parallel class-10-science	1	1828	April 5, 2019
A 14 year old student is not able to see clearly the question’s 1. Name the defect of vision he is suffering from? class-10-science	1	2712	April 5, 2019
Name the four parts labelled as a, b, c and d in given diagram and write their functions class-10-science	1	2729	April 5, 2019
What are tropic movements? Name the types of tropic movements in plants class-10-science	1	1113	April 5, 2019
What are the differences between the transport of materials in xylem and phloem? class-10-science	1	5744	April 5, 2019
Using this table, explain why 1. Li and Na are considered as active metals class-10-science	1	5118	April 5, 2019
A substance ‘X’ used in the kitchen for making tasty pakoras and is also an ingredient of antacid class-10-science	1	6547	April 5, 2019
An old person is unable to see clearly nearby objects. (a) What defect of vision is he suffering from? class-10-science	1	3650	April 5, 2019
Plot a graph between current (I) and potential difference (V) and determine the resistance (R) of the resistor class-10-science	1	5469	April 5, 2019
An object of height 4.0 cm is placed at a distance of 30 cm form the optical centre class-10-science	1	8803	April 5, 2019
Draw diagrams of what he observes (in proper squence) class-10-science	1	519	April 5, 2019
List the steps of preparation of temporary mount of a leaf peel to observe stomata class-10-science	1	5400	April 5, 2019
When a solution of sodium sulphate is added to a solution of barium chloride taken in a test tube? class-10-science	1	1057	April 5, 2019
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions class-10-science	1	1485	April 5, 2019
Explain the function of the following parts of an electric motor. (i) Armature class-10-science	1	3318	April 5, 2019
1. Mention any two components of blood class-10-science	1	3381	April 5, 2019
(a) Write the steps involved in the extraction of pure metals class-10-science	1	13041	April 5, 2019