P-2 Life Processes in Living Organisms Part – 1 — Science STD 10 — Question

A large concave mirror has a radius of curvature of 1.5m. A person stands 10m in front of the mirror. Where is the person’s image?

An electric motor takes 5 amperes current from a 220 volt supply line. Calculate the power of the motor and electrical energy consumed by it in 2.

What kind of mirror, concave, convex or plane, would be best suited for use in a solar cooker? Why?

A white chemical compound becomes hard on mixing with proper quantity of water. It is also used in surgery to maintain joints in a fixed position. Name the chemical compound.

Complete the table:

Substances obtained by microbial processing	Roles
(1) Glutamic acid, Tryptophan, ________	(a) __________
(2) Polysaccharides, glycolipids	(b) __________
(3) Lutein, Xanthenes, ___________	(c) __________
(4) Xylitol, _________	(d) Artificial sweetner (low calorie)

Draw the electron-dot structure of cyclohexane.

Write notes : Oxidation Reaction

Match the column:

Subphylum/Class	Characteristics
(1) Cyclostomata	(a) Collar cells
(2) Urochordat	(b) Sucker
	(c) Tunic
	(d) Chitinous exoskeleton

Find the heat required to convert 20 g of ice at 0 °C into water at the same temperature. (Specific latent heat of fusion of ice = 80 cal/g)