Polypropylene, a thermoplastic polymer made from the monomer propylene, exists mainly as a homopolymer rather than a copolymer. Its structures can vary from highly crystalline to amorphous, making it versatile for different applications such as packaging, textiles, and automotive parts. However, copolymers of polypropylene do exist, including random copolymers (incorporating co-monomers such as ethylene) and block copolymers, enhancing its properties like impact resistance and transparency. The distinction between polypropylene being a homopolymer or copolymer hinges on the polymerization process and the monomers involved.

Yes, you can get silver emulsion paint for walls. Emulsion paint is popular due to its water-based formula, making it quick drying and low in odor compared to oil-based paints. Silver emulsion paint adds a metallic sheen to walls, offering a unique aesthetic. It’s suitable for various interior spaces, creating a modern or futuristic look. While not as commonly found as more traditional colors, many paint manufacturers offer metallic or specifically silver finishes in their ranges. When using silver emulsion paint, it's important to apply a suitable primer to ensure even coverage and the best finish. Also, consider the room's lighting, as it significantly affects the appearance of metallic paints.

The best engine oil grade for the Pulsar 150, a popular motorcycle from Bajaj, is typically 10W-30 or 20W-50, as recommended by the manufacturer. These grades ensure optimal performance and longevity of the engine under various operating conditions. The 10W-30 grade is generally suitable for cooler climates or less strenuous riding conditions, providing a good balance between protection and fuel efficiency. On the other hand, 20W-50 is preferred in hotter climates or for motorcycles subjected to heavy-duty use, offering thicker oil film protection at high temperatures. Always consult the owner's manual or an authorized dealer for the most accurate recommendation for your specific model and riding conditions.