Question

PART A - Which of the following represents a state of matter?

- volume

- solid

- melting point

- density

PART B - What types of atoms make up hydrogen peroxide?

PART C - Which of the following statements is TRUE?

- Hydrogen peroxide can be used as a drink and can be used to bathe in. - Both water and hydrogen peroxide are stable molecules. - Hydrogen peroxide is smaller than water. - Hydrogen peroxide is used as rocket fuel and removes color from hair.

PART D - What does Dalton's Atomic Theory say?

- the properties of matter are determined by the properties of atoms - matter is composed of small indestructible particles - energy is neither created nor destroyed during a chemical reaction - an atom is predominantly empty spacean atom is predominantly empty space

Answer 1

Ans

Part A. B. Solid

There are 3 states of matter namely, solid , liquid and gas.

Part B . There are 2 types of atoms that make up the hydrogen peroxide molecule.

The molecular formula of the compound is H2O2 , so 2 atoms of hydrogen and 2 atoms of oxygen are its constituents.

Part C. Hydrogen peroxide is used as a rocket fuel and removes color from air.

Hydrogen peroxide is called as monopropellant and is used in rocket as fuels . Germans used it in world war II. It is a strong oxidising agent hence bleaches fabrics , skin , hair etc.

Part D. Matter is composed of small indestructible particles.

Dalton said matter is made up of small indestructible particles which are called as atoms.

An element has identical atoms and different elements would have different particles.