Class 9th · Chemistry · Chapter 11
Chapter 11: Hydrocarbons
Chapter 11 of the Punjab Board Class 9th Chemistry textbook runs from page 149 to 160. Its exercise has multiple choice questions and exercise. Open any of those pages in GenZ Books, tap a question, and the answer is worked from this chapter.
Open Chapter 11 of Chemistry in GenZ Books
The same Class 9th textbook, page for page. Tap any question and get the answer worked from that chapter — English and Urdu.
What you will learn
- ¢ Describe the properties of alkanes as being generally unreactive, except in terms of combustion and substitution by chlorine ¢ State that in a substitution reaction one atom or group of atoms is replaced by another atom or group of atoms ¢ Describe the substitution reaction of alkanes with chlorine as a photochemical reaction, and draw the structural or displayed formulae of the products. ¢ Describe, using symbol equations, preparation of alkanes from cracking of larger hydrocarbons, hydrogenation of alkenes and alkynes, and reduction of alkyl halides Introduction All the organic compounds are known to contain carbon as an essential element. This fact has led us to define organic chemistry as the chemistry of carbon compounds. The ionic compounds like carbonates, cyanides, carbides and cyanates, etc. and the oxides of carbon are, however, classified as inorganic compounds. Apart from carbon, most of the organic compounds contain hydrogen and oxygen as well. Organic compounds are famous for their large number and diverse behaviour. Several million organic compounds are known to exist naturally or have been synthesized in the l
Exercise
- Multiple Choice Questionsp. 158
- Exercisep. 162