Which catalyst is used to add hydrogen across the double bond of an alkene?

1. Adding hydrogen across a C=C bond is called hydrogenation. 2. The reaction needs a finely divided metal catalyst. 3. Nickel (or palladium / platinum) is commonly used. 4. Concentrated H2SO4 is used for dehydration, not hydrogenation. 5. Hence Ni is the standard catalyst here. _Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_