Draw a ray diagram to show the path of the reflected ray corresponding to an incident ray which is directed parallel to the principal axis of a convex mirror. Mark on it the angle of reflection.

List two measures that you would suggest for the better management of water resources.

List four modes of asexual reproduction.

Consider two elements 'A' (Atomic number 17) and 'B' (Atomic number 19):

(i) Write the positions of these elements in the modern periodic table giving justification.

(ii) Write the formula of the compound formed when 'A' combines with 'B'.

(iii) Draw the electron dot structure of the compound and state the nature of the bond formed between the two elements.

Write the names of those parts of a flower which serve the same function as the following do in the animals:

(i) testis (ii) sperm (iii) ovary (iv) egg