Registration date for the entry test of University of Health Sciences Lahore (UHS) is 19th July 2019 until 29th July 2019. UHS has announced its syllabus for MCAT 2020. Syllabus is same as last year. Punjab MCAT test is based on four subject’s major subjects Physics, Chemistry, Biology, and English. UHS MCAT test is very competitive, every year thousands of students appear in it to get admission in Medical colleges, but only those students get selected who perform good in MCAT.
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Transition elements from complexes due which of the following reason?
- Para magnetism
- Vacant d-orbitals
- Large nuclear charge
- Small cation size
Vacant orbitals of central metal atom or iron are filled by ligands to form metal complexes.
In Chemistry, a coordination complex or metal complex consists of a central atom or ion which is usually metallic and is called the coordination center and a surrounding array of bound molecules or ions that are in turn known as ligands or complexing agents. Many metal containing compounds, especially those of transition metals are coordination complexes.
For homogeneous catalysis reaction between liquids, the catalyst should be of which form?
- Can be any of the above
In chemistry, homogeneous catalysis is a sequence of reactions that involve a catalyst in the same phase as the reactants. Phase here refers to solid, liquid, vs gas. Most commonly, a homogeneous catalyst is co-dissolved in a solvent with the reactants.
Basics of Chemistry
Non-stoichiometric compounds are formed by:
- Only alkali metals
- Only transition elements
- Only noble gases
- None of the above
Only transition elements
Binary transition metal compounds, such as the oxides and sulfides, are usually written with idealized stoichiometry’s, such as FeO or FeS but these compounds are usually cation deficient and mostly never contain a 1:1 cation:anion ratio. Thus a substance such as ferrous oxide is actually a nonstoichiometric compound with a range of compositions.