Applied Chemistry-2. Uttrakhand Polytechnic 2nd Semester Exam Question Paper Solution. UBTER. 2024.

Summary

This video provides a detailed breakdown of important questions from a Polytechnic second semester chemistry exam. The presenter covers a range of topics, from the formula of common substances like hematite (Fe₂O₃) and brass (copper and zinc) to theoretical concepts such as electrochemical corrosion and the properties of lubricants. The speaker emphasizes essential exam topics, definitions, and useful study resources, encouraging viewers to utilize PDFs and video tutorials for in-depth preparation. By focusing on frequently asked questions, students can boost their chances of success in the upcoming exams.

Takeaways

• 😀 The formula for Hematite is Fe2O3.
• 😀 Brass is an alloy of copper and zinc.
• 😀 The full form of LPG is Liquefied Petroleum Gas.
• 😀 The octane number of isooctane is 100.
• 😀 The electrochemical theory of corrosion was given by Michael Faraday.
• 😀 Corrosion is an example of oxidation.
• 😀 Graphite is used as a lubricant in solid form.
• 😀 Increasing the temperature decreases the viscosity of lubricants.
• 😀 The main component of cement is limestone (Chuna Patthar).
• 😀 Glass is a supercooled liquid, not a solid.

Q & A

What is the formula of Hematite?

The formula of Hematite is Fe₂O₃.

What metals constitute the alloy Brass?

Brass is an alloy of Copper (Cu) and Zinc (Zn).

What does the full form of LPG stand for?

The full form of LPG is Liquefied Petroleum Gas.

What is the octane number of Isooctane?

The octane number of Isooctane is 100.

Who proposed the electrochemical theory of corrosion?

The electrochemical theory of corrosion was proposed by Michael Faraday.

What is an example of corrosion?

Oxidation is an example of corrosion.

What is the role of Graphite as a lubricant?

Graphite is used as a solid lubricant, reducing friction between surfaces.

How does temperature affect the viscosity of lubricants?

Increasing the temperature of a lubricant decreases its viscosity.

What is the main constituent of cement?

The main constituent of cement is Limestone.

Why is glass considered a supercooled liquid?

Glass is considered a supercooled liquid because it has an amorphous structure that doesn't fully solidify.