P-1 Gravitation — Science STD 10 — Question

Give two examples of alkanes.

Electric generator converts………..energy into electric energy.

What would have been happened if any of the cells in nature had not been divided by meiosis?

What property of the filament wire accounts for this difference?

What is graphite? Of what substance is graphite made?

1. Which simple food is prepared first in the process of photosynthesis?
2. Name the food which gets stored in plant leaves.

The family of metals having valency one.

Translate the following statement into chemical equation and then balance it:
Barium chloride solution reacts with aluminium sulphate solution to form a precipitate of barium sulphate and aluminium chloride solution.

Define:centre of curvature.

Describe the nature of image formed when an object is placed at a distance of 30cm from a convex lens of focal length 15cm.