The performance of a student in `1^(st)` term and `2^(nd)` term is given. Draw a double bar graph choosing appropriate scale and answer the following:
Has the performance gone down in any subject?

The performance of a student in 1^(st) term and 2^(nd) term is given. Draw a double bar graph choosing appropriate scale and answer the following: In which sub ject, has the child improved his performance the most?

Number of persons in various age groups in a town is given in the following table. Draw a bar Draw a bar graph to represent the above information and answer the following questins. (take 1 unit lenght = 20 thousands) (a) Which two age groups have same population?

Number of persons in various age groups in a town is given in the following table. Draw a bar Draw a bar graph to represent the above information and answer the following questins. (take 1 unit lenght = 20 thousands) (b) All persons in the age group of 60 and above are called senior citizens. How many senior citizens are there in the town?

Analyse the observation table which shows variation of image distance [v] with object distance [u] in the case of a convex lens. Answer the questions that follow without doing any calculations. {:("Sl.No","Object distance","Image distance"),(,"u [cm]","v [cm]"),(1,-90,+18),(2,-60,+20),(3,-30,+30),(4,-20,+60),(5,-18,+90),(6,-10,+100):} (a) What is the focal length of the convex lens ? Given reasons to support your answer. (b) Write the Sl.No of the observation which is not correct. How did you arrive at this conciusion ? (c ) Use an appropriate scale to draw the ray diagram for the observation at Sl. No 4 and find the approximate value of magnification.

a) List any three observation that determine that a chemical reaction has taken place. Also list three in formation that cannot be obtained about a chemical reaction merely by its chemical equation. b) Balance the following chemical equations i) Fe+H_(2)O to Fe_(3)O_(4) +H_(2) ii) CO_(2)+H_(2)O to C_(6)H_(12)O_(6) +O_(2) OR a) Explain the following in terms of gain or lose of oxygen with two examples each. i) Oxidation ii) reduction. b) Balance the following chemical equations. 1) HNO_(3)+Ca(OH)_(2) to Ca(NO_(3))_(2)+H_(2)O ii) NaOH + H_(2)SO_(4) to Na_(2)SO_(4) + H_(2)O