P-2 Cell Biology and Biotechnology — Science STD 10 — Question

Name the phenomenon due to which a pencil partly immersed in water and held obliquely appears to be bent at the water surface.

Why do electricians wear rubber hand gloves while working with electricity?

Two non-metals combine with by the sharing of electrons to form a compound X.
What type of chemical bond is present in X?

What is the importance of a chemical equation?

……………. are used to carry and place a satellite in a specific orbit.

What are planktons?

Name that part of the eye which is equivalent to the photographic film in a camera.

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

If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?

How should the two resistances of 2 ohms each be connencted so as to produce an equivalent resistance of 1 ohm?