P-2 Environmental management — Science STD 10 — Question

What type of chemical reactions are represented by the following equations?
A + B → C

Write an aquatic food chain.

Explain why, filament type electric bulbs are not power efficient.

What are the organs in humans which produce the gametes?

which group elements have seven electrons in the outermost shell?

A man having blood group O marries a woman having blood group B and they have a daughter. What will be the blood group of the daughter?

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.

What is the importance of a chemical equation?

What is meant by reproduction?