The choice of a reducing agent in a particular case depends on thermodynamic factor. How far do you agree with this statement? Support your opinion with two examples.

The collision between two hydrogen atoms is perfectly elastic ,so the momentum is consered.Do you agree with this statement?

Sometimes due to biotic /abiotic factor the climax remain in a particular seral stage (pre climax) without reaching climax. Do you agree with this statement? If yes give a suitable example.

"India has greater ecosystem diversity than Norway. "Do you agree with the statement? Give reasons in support of your answer.

Do you agree that regional and local variations within each Biome. Substantiate your answer with suitable example.

One of the two set squares in your instrument box has angles of measure 30^(@) - 60^(@) - 90^(@) Take two such identical set - squares .Place them side by side to form a kite like the one shown here . How many lines of symmetry does the shape have ? Do you think that some shapes may have more than one line of symmetry ?

A manufacturer considers that men and women are equally efficient and so he pays them at the same rate. He has 30 and 27 units of workers ( male and female) and capital respectively, which he uses to produce two types of goods A and B. To produce one unit of A 2 workers and 3 units of capital are required while 3 workers and 1 unit of capital are required to produce one unit of B. If A and B are priced at Rs 100 and Rs 120 per unit respectively, how should he use his resources to maximise the total revenue? From the above as as LPP and solve graphically. Do you agree with this view of the manufacturer that men and women are equally efficient and so should be paid at the same rate?

You are given two metal spheres mounted on protable insultating supports. Find the way use a glass rod rubbed with silk but may not touch it to spheres. Do the spheres have to be of equal size for your method to work?

Draw a circle and any two of its diameter.If you join the ends of thes diameters,what is the figure obtained?What figure is obtained if the diameters are perpendicular to each others?How do you check your answer?