Table of Contents
- 1 Which of the chemical sediments below fizzes with direct application of HCl?
- 2 Which of the following minerals has metallic luster silver color black streak and contains iron?
- 3 What is the resistance of a mineral to being scratched called?
- 4 What mineral has a black streak?
- 5 Which of the following minerals will fizz when it comes in contact with hydrochloric acid?
- 6 What rock fizzes in acid?
Which of the chemical sediments below fizzes with direct application of HCl?
Calcite effervesces with direct application of HCl, whereas dolomite only effervesces with HCl when it is powdered.
Which of the following minerals has metallic luster silver color black streak and contains iron?
Magnetite. Magnetite is black or silver in color with a black streak. It has a hardness of 6. Magnetite is naturally magnetic and the chemical composition is Fe3O4.
Which mineral gives off bubbles of carbon dioxide gas?
Limestone gives off bubbles of carbon dioxide. Most fresh water and sea water contain dissolved calcium carbonate.
What is the resistance of a mineral to being scratched called?
Hardness (H) is the resistance of a mineral to scratching. It is a property by which minerals may be described relative to a standard scale of 10 minerals known as the Mohs scale of hardness.
What mineral has a black streak?
346 Minerals with a Black Streak Sorted By Streak Color, Luster, and Color
| Mineral Name | Streak Color | Color |
|---|---|---|
| Tenorite # | black | black |
| Asbolane # | black | black |
| Asbolane # | black | black |
| Tenorite # | black | black |
What is metallic luster mineral?
Metallic lustre Metallic (or splendent) minerals have the lustre of polished metal, and with ideal surfaces will work as a reflective surface. Examples include galena, pyrite and magnetite.
Which of the following minerals will fizz when it comes in contact with hydrochloric acid?
Some minerals react to acid. Calcite especially will fizz and bubble when it comes in contact with an acid such as hydrochloric acid at room temperature.
What rock fizzes in acid?
Limestone
Limestone is an unusual rock in that it fizzes when dilute acid is placed on its surface. It is the presence of calcium carbonate that is responsible for this.
Which mineral’s might you be examining if you place some hydrochloric HCl acid on a sample and it fizzes?
An example of such a special property is the effervescent reaction of calcite to a weak solution of hydrochloric acid (5% HCl). Calcite fizzes or effervesces as the HCl solution dissolves it and creates CO2 gas. Calcite is easy to identify even without testing the reaction to HCl, by its hardness, luster and cleavage.