Carbon's ability to form long chains (catenation) makes it unique. Diamond: Hardest natural substance; used in glass cutting. Graphite: Soft, used as a lubricant and in pencils. Fullerenes: Spherical molecules. Hydrocarbons: Alkanes: Single bonds ( CnH2n+2cap C sub n cap H sub 2 n plus 2 end-sub Alkenes: Double bonds ( CnH2ncap C sub n cap H sub 2 n end-sub Alkynes: Triple bonds ( CnH2n−2cap C sub n cap H sub 2 n minus 2 end-sub 7. Important Chemicals in Everyday Life
: Physical changes are reversible and do not form new substances, whereas chemical changes are irreversible and result in new substances. chemistry notes ssc
Rohan realized that the best "Chemistry Notes for SSC" aren't copied from a topper or a guidebook. They are the messy, personal alchemy of turning confusion into clarity—one green-pen reaction at a time. Carbon's ability to form long chains (catenation) makes
