Periodic Classification of Elements — Science STD 10 — Question

State whether the following statements are true or false:

1. The scattering away of red light makes the sky appear blue during the day time.
2. The scattering away of blue light makes the sun appear red at sunset.

Closely related species have few characteristics in common. [True/ False]

Interbreeding among individuals of different populations of a species maintains a free flow of genes in these populations. [True/ False]

State whether the following statement is true or false:
The aqueous solution of an ionic compound conducts electricity because there are plenty of free electrons in the solution.

The organ which extract the nitrogenous wastes from small the blood are nephron. [True/ False]

Fleming's left hand rule is used to find the direction of induced current. [True/False]

State whether the following statement is true or false :
Non-metals react with dilute acids to produce a gas which burns with a ‘pop’ sound.

Convex mirror and convex lens always form virtual image. [True/ False]

State whether the following statements are true or false:
Newlands divided the elements into horizontal rows of eight elements each.

The water stored in ground evaporated easily.