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Test: Important Chemical Compounds - 1 - Class 10 MCQ


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15 Questions MCQ Test Science Class 10 - Test: Important Chemical Compounds - 1

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Test: Important Chemical Compounds - 1 - Question 1

What is the chemical formula for baking soda?

Detailed Solution for Test: Important Chemical Compounds - 1 - Question 1

What is sodium bicarbonate? | MEL Chemistry
The chemical formula for baking soda is NaHCO3, which stands for sodium bicarbonate. Baking soda is commonly used in various applications such as in cooking, as an antacid, and as a water softener due to its alkaline properties.

Test: Important Chemical Compounds - 1 - Question 2

How is washing soda produced from baking soda?

Detailed Solution for Test: Important Chemical Compounds - 1 - Question 2
Washing soda is produced from baking soda by heating it. When baking soda (sodium bicarbonate) is heated, it undergoes a chemical reaction to form sodium carbonate, which can then be recrystallized to yield washing soda (sodium carbonate) in its hydrated form. Washing soda is commonly used in industries such as glass, soap, and paper production.
Test: Important Chemical Compounds - 1 - Question 3

What is the primary use of baking soda in managing stomach-related issues?

Detailed Solution for Test: Important Chemical Compounds - 1 - Question 3
Baking soda is utilized as an antacid to manage indigestion and stomach discomfort by lowering the level of acidity in the stomach. It helps neutralize excess stomach acid, providing relief from symptoms like heartburn and indigestion.
Test: Important Chemical Compounds - 1 - Question 4
Which industry commonly uses washing soda as a cleaning agent?
Detailed Solution for Test: Important Chemical Compounds - 1 - Question 4
Washing soda (sodium carbonate) is commonly used as a cleaning agent in household settings. It is effective in removing stains, grease, and grime due to its alkaline properties. Additionally, washing soda is utilized to soften water and enhance the cleaning power of soaps and detergents.
Test: Important Chemical Compounds - 1 - Question 5
What is the process in which a solid substance is formed, with atoms or molecules arranged in a strong structure called a crystal?
Detailed Solution for Test: Important Chemical Compounds - 1 - Question 5
Crystallization is the process where a solid substance is formed, with atoms or molecules arranged in a strong structure called a crystal. It can occur through various methods like precipitation from a solution, freezing, or direct deposition from a gas.
Test: Important Chemical Compounds - 1 - Question 6

Which of the following materials is NOT mentioned as an example of a substance with a crystalline structure?

Detailed Solution for Test: Important Chemical Compounds - 1 - Question 6

Mentions sugar (sucrose), salt (sodium chloride), and diamond as examples of materials with crystalline structures. Diamond has a well-defined internal arrangement of atoms, making it a crystal. Graphite, on the other hand, is not mentioned in the examples provided.

Test: Important Chemical Compounds - 1 - Question 7

What is the term used to describe the water that combines with a salt to form crystals?

Detailed Solution for Test: Important Chemical Compounds - 1 - Question 7

Water of Crystallization - GeeksforGeeks
The water that combines with a salt to form crystals is known as water of crystallization. This water is integral to the formation of crystals and is a key part of the crystallization process.

Test: Important Chemical Compounds - 1 - Question 8
Which process involves the direct formation of a solid substance from a gas without going through a liquid phase?
Detailed Solution for Test: Important Chemical Compounds - 1 - Question 8
Deposition is the process in which a solid substance is directly formed from a gas without passing through a liquid phase. This process is distinct from sublimation, precipitation, and evaporation, as it involves the direct transition of a substance from a gas to a solid.
Test: Important Chemical Compounds - 1 - Question 9

What is the chemical formula for Plaster of Paris?

Detailed Solution for Test: Important Chemical Compounds - 1 - Question 9

The chemical formula for Plaster of Paris is CaSO4. ½ H2O. When gypsum is heated to a certain temperature, it undergoes a reaction to yield CaSO4. ½ H2O, which is the compound that forms Plaster of Paris. This compound indicates that two units of CaSO4 share one molecule of water, giving it its specific chemical composition.

Test: Important Chemical Compounds - 1 - Question 10
For what purpose is Plaster of Paris commonly used in orthopedic medicine?
Detailed Solution for Test: Important Chemical Compounds - 1 - Question 10
Plaster of Paris is often used in orthopedic medicine to create casts for broken bones. When mixed with water, it forms a paste that can be molded around the injured area. As it hardens, it creates a sturdy cast that helps support the bone during the healing process. This application showcases the versatility and effectiveness of Plaster of Paris in the medical field.
Test: Important Chemical Compounds - 1 - Question 11
What makes Plaster of Paris a popular material in sculpting and art?
Detailed Solution for Test: Important Chemical Compounds - 1 - Question 11
Plaster of Paris is a popular material in sculpting and art due to its quick drying time. Artists appreciate the fact that it can be molded into various shapes and textures and dries rapidly, making it a convenient choice for creating intricate designs. This characteristic allows artists to work efficiently and bring their creative visions to life in a timely manner.
Test: Important Chemical Compounds - 1 - Question 12
In addition to sculpting and art, where else is Plaster of Paris commonly used?
Detailed Solution for Test: Important Chemical Compounds - 1 - Question 12
Plaster of Paris is commonly used in home decoration. It can be utilized to create decorative wall accents, ceiling tiles, and other architectural details. Additionally, it is popular for making decorative figurines, ornaments, and various crafts due to its versatility and ease of use. These applications highlight the broad range of uses for Plaster of Paris beyond just sculpting and art.
Test: Important Chemical Compounds - 1 - Question 13

What is the chemical formula of bleaching powder?

Detailed Solution for Test: Important Chemical Compounds - 1 - Question 13

The chemical formula of bleaching powder is CaOCl2. This compound is commonly used as a bleaching agent in the textile industry and as an oxidizing agent and disinfectant in various other industries due to its strong oxidizing properties.

Test: Important Chemical Compounds - 1 - Question 14
What happens at the cathode during the electrolysis of brine?
Detailed Solution for Test: Important Chemical Compounds - 1 - Question 14
During the electrolysis of brine, hydrogen gas is released at the cathode. This process is essential in the production of various chemicals, including sodium hydroxide and chlorine gas.
Test: Important Chemical Compounds - 1 - Question 15
What is the primary use of bleaching powder in the textile industry?
Detailed Solution for Test: Important Chemical Compounds - 1 - Question 15
In the textile industry, bleaching powder is primarily used for bleaching cotton and linen due to its strong bleaching properties. It helps in whitening fabrics and preparing them for dyeing processes, enhancing their appearance and quality.
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