Questions

In vulcanization, cruder rubber is heated with 3% sulphur at about for 1200C for 2-3 hours.

Vulcanised rubber is a vastly improved product.

River Dolphin is the National Aquatic Animal of India.

A given quantity of finished goods requires a given quantity of raw materials and components to make them. Materials requirement planning systems to make them. Materials requirements planning systems are computerized tools that manage when materials must be ordered to supply production at a later date. MRP is effective when output quantities are known.Small business owners are often their own MRP systems,storing the information needed to supply prodution in their knowledge and experience. Activities such as computer tracking inventory and forecasting demand are MRP activities.

Here the most stable carbocation is the option (2).

Carbocations are always hungry for electrons. The stability of carbocations increases from primary to secondary to tertiary. Here, option (c) shows the most stable carbocation because it can easily withdraw electrons from two other carbon atoms and the more electronegative oxygen atom.

Carbocation stability depends on hyperconjugation. The tertiary carbocation is stabilized by electron releasing inductive effect.