Acids, Bases and Salts — Science STD 10 — Question

Name a tiny fresh-water animal which reproduces by the same method as that of yeast ? What is this method known as?

Under what soil conditions do you think a farmer would treat the soil of his fields with quicklime (calcium oxide), Or slaked lime (calcium hydroxide) or chalk (calcium carbonate)?

If an object is placed at a distance of 10cm in from of a plane mirror, how far would it be from its image?

State any two uses of convex lenses.

Which plant hormone is responsible for the wilting and falling of leaves?

Answer the following:
Name the endocrine gland associated with kidneys?

Name the gland which controls the secretion of hormones from the pituitary.

Describe the surgical methods of birth control:

1. For men.
2. For women.

Name the product formed when hydrogen is added to ethene.