Chemistry
Grade-7
Easy
Question
Name the physical state of the components in the following mixtures:
(i). Pond water
(ii). Sugarcane juice
(iii). Petroleum oil
(iv). Gun powder
Hint:
B
The correct answer is:
- A typical waste stabilisation pond ecosystem's key abiotic components include oxygen, carbon dioxide, water, sunlight, and nutrients, while the biotic components include bacteria, protozoa, and a variety of other animals. It is solid and liquid.
- Grinding the sugarcane culms yields sugarcane juice. It is mostly composed of 70 to 75% water, 13 to 15% sucrose, and 10 to 15% fibre. It is solid and liquid.
- Crude oil, or oil is a mixture of relatively volatile liquid hydrocarbons (compounds primarily made of hydrogen and carbon), with trace of nitrogen, sulphur, and oxygen. These components combine to generate a wide range of complicated molecular structures, some of which are difficult to identify. It is liquid and liquid.
- Gunpowder, often known as black powder, is made up of sulphur, carbon (in the form of charcoal), and potassium nitrate (saltpeter). It is solid and solid.
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