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

Write the structural formula of propyne.

Name the asexual method of reproduction in yeast.

If the image formed by a lens is always diminished and erect, what is the nature of the lens?

How does the valency of elements vary in going down a group of the periodic table?

State two metals which displace hydrogen from dilute acids and two metals which do not do so.

Take into account the time required for following processes. Classify them into two groups and give titles to the groups.
(1) Cooking gas starts burning on ignition.
(2) Iron article undergoes rusting.
(3) Erosion of rocks takes place to form soil.
(4) Alcohol is formed on mixing yeast in glucose solution under proper condition.
(5) Effervescence is formed on adding baking soda into a test tube containing dilute acid.
(6) A white precipitate is formed on adding dilute sulphuric acid to barium chloride solution.

Construct a food chain comprising the following:
Snakes, Hawk, Rats, Plants.

Find the focal length of a concave mirror whose radius of curvature is 32cm.

Write the functions of the following: Vagina.