Which compound has the formula [Co(en)2Cl₂]Cl?
The IUPAC name matches [Co(en)2Cl₂]Cl.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Nomenclature of Coordination Compounds
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What is the formula of the compound formed between phosphorus and oxygen in its highest oxidation state?
P (group 15, valence 5 in +5 state) forms P₂O₅ with oxygen (valence 2), a stable acidic oxide.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electronic Configuration and Types of Elements - s p d f Blocks
What is the formula of the hydride formed by phosphorus?
P (group 15) forms PH₃ with hydrogen, following the trend of group 15 hydrides.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Electron Gain Enthalpy and Electronegativity and Valency