The number of geometrical isomers found in the metal
complexes [PtCl₂(NH₃)₂], [Ni(CO)₄], [Ru(H₂O)₃Cl₃ and [CoCl₂(NH₃)₄]⁺ respectively, are :

Presence of which reagent will affect the reversibility of the following reaction, and change it to a irreversible reaction :

CH₄ + I₂ $$\mathrel{\mathop{\kern0pt\rightleftharpoons} \limits_{{\mathop{\rm Re}\nolimits} versible}^{hv}} $$ CH₃ $$-$$ I + HI

Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide?

Consider the above reaction and identify the Product P :