996because they r gud electron donor and can also donate electrons frm there penultimate shell
Bitan Chakraborty Think how the donate H to unsaturated hydrocarbons.
Upvote·0· Reply ·2013-02-06 22:22:28- Swarna Kamal Dhyawala Common catalysts used are insoluble metals such as palladium in the form Pd-C, platinum in the form PtO2, and nickel in the form Ra-Ni. With the presence of a metal catalyst, the H-H bond in H2 cleaves, and each hydrogen attaches to the metal catalyst surface, forming metal-hydrogen bonds. The metal catalyst also absorbs the alkene onto its surface. A hydrogen atom is then transferred to the alkene, forming a new C-H bond. A second hydrogen atom is transferred forming another C-H bond. At this point, two hydrogens have added to the carbons across the double bond. Because of the physical arrangement of the alkene and the hydrogens on a flat metal catalyst surface, the two hydrogens gets added to the same face of the double bond
- Bitan Chakraborty Yup!!
