Toc MCQ Test Chapter No. 2 And 3
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Questions and Answers
- 1.
Draw and upload the diagram of hydrogenation of oil. (Important question in semester exam)
- 2.
Draw and upload the picture of manufacturing of Paint (Mandatory question in semester exam)
- 3.
Explain manufacturing of detergent
- 4.
Explain manufacturing of soap by continuous process (Important question for semester exam)
- 5.
For Hydrogenation of oil which catalyst is used?
- A.
Platinum
- B.
Nickel
- C.
Zinc Oxide
- D.
Iron
Correct Answer
B. NickelExplanation
Nickel is used as a catalyst for the hydrogenation of oil. Hydrogenation is a chemical process that involves the addition of hydrogen to unsaturated fats or oils to make them more solid and increase their shelf life. Nickel catalysts are commonly used in this process because they have the ability to adsorb and activate hydrogen molecules, allowing them to react with the carbon-carbon double bonds present in unsaturated oils. This reaction helps to convert these double bonds into single bonds, resulting in the saturation of the oil and the formation of a solid or semi-solid product.Rate this question:
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- 6.
In the cleansing action of soap the polar end is
- A.
Water insoluble
- B.
Oil soluble
- C.
Water soluble
- D.
Oil insoluble
Correct Answer
C. Water solubleExplanation
In the cleansing action of soap, the polar end is water soluble. This means that the polar end of the soap molecule is attracted to water molecules. When soap is mixed with water, the polar end of the soap molecule forms hydrogen bonds with water molecules, allowing it to dissolve in water. This property of soap allows it to effectively remove dirt and oil from surfaces, as the water-soluble polar end of the soap molecule can surround and lift away oil and dirt particles, which are typically not water soluble.Rate this question:
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- 7.
White pigment contains
- A.
Cadmium selenide
- B.
Titanium dioxide
- C.
Carbon black
- D.
Zinc sulphate
Correct Answer
B. Titanium dioxideExplanation
Titanium dioxide is a white pigment commonly used in various industries such as paint, cosmetics, and food. It is known for its excellent opacity, brightness, and ability to reflect light. Due to its high refractive index, it effectively scatters and reflects light, resulting in a bright white appearance. Titanium dioxide is also chemically stable and resistant to discoloration, making it a popular choice for achieving a white color in various products. Therefore, the presence of titanium dioxide in white pigment is a valid explanation for the correct answer.Rate this question:
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- 8.
Extenders are used to accelerate the drying.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
This statement is false. Extenders are not used to accelerate the drying process. Extenders are actually used to increase the volume or extend the coverage of a paint or coating without affecting its drying time. They are typically added to reduce the cost of the paint or to modify its properties, but they do not have any impact on the drying speed.Rate this question:
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- 9.
Uses of Vegitable oil
- A.
For production of Biodiesel
- B.
Cooking purpose
- C.
In Paint Manufacturing
- D.
All of above
Correct Answer
D. All of aboveExplanation
The correct answer is "All of above". Vegetable oil can be used for the production of biodiesel, as it can be converted into a renewable and environmentally friendly fuel. It is also commonly used for cooking purposes, as it is a healthier alternative to other types of oil. Additionally, vegetable oil is used in the manufacturing of paint, as it helps to create a smooth and glossy finish. Therefore, all of the given options are valid uses of vegetable oil.Rate this question:
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- 10.
Solvent used for oil extraction is
- A.
Hexane
- B.
Benzene
- C.
Petroleum Ether
- D.
All of above
Correct Answer
D. All of aboveExplanation
The correct answer is "All of above." This means that all three solvents mentioned - hexane, benzene, and petroleum ether - can be used for oil extraction. These solvents are commonly used in various extraction processes due to their ability to dissolve oils and fats effectively. Each solvent may be preferred based on the specific requirements of the extraction process or the type of oil being extracted.Rate this question:
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