P-1 Metallurgy — Science STD 10 — Question

Many players are seen consuming some food stuffs during breaks of the games.

Indians should follow family planning for controlling the population.

Consuming liquor is always bad.

The bottom of a pond appears raised.

While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.

Green plants are called autotrophs.

When copper articles exposed to air for a long time, gets corroded.

Though tortoise lives on land as well as in water, it cannot be included in class-Amphibia.

Write scientific reason.
In a group, the size of the atom increases as it goes down from the top.

Give scientific reason:
We cannot clearly see an object kept at a distance less than 25 cm from the eye.