Is Matter Around Us Pure — Science STD 9 — Question

State whether the following statements are true or false:
A chloride ion has negative charge because it has more electrons than a neutral atom.

Most part of the atom is hollow.

For the following statements, write T for True and F for False.

An isotope of iodine is used for making tincture iodine, which is used as a medicine.

Sea water boils below 100°C. [True/ False]

State whether the following statement is true or false:
Red brown bromine vapour diffuse into air in a gas jar but the colourless air molecules do not diffuse into bromine vapour.

State whether the following statements are true or false:
The anode rays obtained from all the gases consist of positively charged particles called protons.

State whether the following statement is true or false:
Solid carbon dioxide is stored under low pressure.

State whether the following statements are true or false:
Thomson proposed that the nucleus of an atom contains protons and neutrons.

State whether the following statements are true or false:

1. Bread is an example of solid foam.

2. Sponge is an example of solid sol.

What type of colloids are bread and sponge?

For the following statements, write T for True and F for False.
J.J. Thomson proposed that the nucleus of an atom contains only nucleons.