Draw the structural formulae of all the possible isomers of the compound with the molecular formula C₃H₆O and also give their electron dot structures.

With the help of a labelled circuit diagram wire describe an activity to illustrate the pattern of the magnetic field lines around a straight current carrying long conducting wire.

i) Name the rule that is used to find the direction of the magnetic field associated with a current carrying conductor.

ii) Is there a similar magnetic field produced around a thin beam of moving (a) alpha particles and (b) neutrons? Justify your answer.

You are given balls and stick model of six carbon atoms and fourteen hydrogen atoms and sufficient number of sticks. In how many ways one can join the models of six carbon atoms and fourteen hydrogen atoms to form different molecules of C₆H₁₄.

(a) i) Draw a neat diagram of human brain and

ii) Label Medulla and Cerebellum

iii) Write the functions of the above-mentioned parts

(b) ”Both overproduction and underproduction of Growth hormone lead to disorders in the body.” Explain

Noopur needs a lens of power -4.5D for correction of her vision.

a) What kind of defect in vision is she suffering from?

b) What is the focal length and nature of the corrective lens?

c) Draw ray diagrams showing the (a) defected eye and (b) correction for this defect.

d) What are the causes of this defect?