List three differences between arteries and veins.

Differentiate between the arrangement of elements in Mendeleev’s periodic table and Modern periodic table.

Explain the ways in which glucose is broken down in absence of oxygen.

How do Mendel’s experiments show that traits may be dominant or recessive?

Rohit focused the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle, screen and lens as under:

Position of candle = 26.0 cm

Position of convex lens = 50.0 cm

Position of screen = 74.0 cm

i) What is the focal length of the convex lens?

ii) Where will the image be formed if he shifts the candle towards the lens at a position of 38 cm?

iii) Draw a ray diagram to show the formation of the image in case (ii) as said above?