Magnetic Effects of Electric Current — Science STD 10 — Question

What does a Mimosa pudica plant do in response to touch? What is this phenomenon known as?

Write down the reasons, effects and remedial measures taken for any two disasters experienced by you.

Three alkaline earth metals with electronic configuration.

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.

The group with valency zero.

What sign (+ve or -ve) has been given to the following on the basis of Cartesian Sign Convention?

1. Height of a real image.
2. Height of a virtual image.

Which property of copper and aluminium makes them suitable:
For making electric wires?

What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.

Name the process by which plants make food.

Though I am multicellular, there are no tissues in my body. What is the name of my phylum?