Write the full form of SCID and mention the cause of this congenital disorder. Mention any one point how SCID is different from AIDS.

Write full form of 2, 4-D. also mention one use of it in agriculture.

What is the full form of IBA ?Also mention its one use in agricultrue.

Write the full name of VNTR How is VNTR different from 'Probe'?

Write full form of SONAR. List any two purposes for which, it is used and explain its working for any one such purpose.

Write the parametric form of equation of tangents drawn from any point on the circle x^(2) + y^(2) = 25

Deduce an expression for electric potential due to an electric dipole at any point on its axis. Mention one contrasting feature of electric potential of dipole at a point as compared to that due to a single charge.

Show diagramatically two different arrangements used for winding the primary and secondary coils in a transformer. Assuming the transformer to be an ideal one write expressions fo rthe ratio of its output current to input current in terms of the number of turns in the primary and secondary coils. Mention two reasons for energy losses in an actual transformer.

Write the names and symbols of two most reactive metals belongiong to group I of the periodic table. Explain by drawing electronic structure how either one of the two metals reacts with halogen. With which name is the bond formed between these elements known and what is the class of the compuond so formed known? state any four physical properties of such compounds.