Which pigment system is not directly involved in photooxidation of water and evolution of molecular oxygen?

Give one example of reaction in which oxidation occurs without involving oxygen.

Miller performed experiment to prove abiogenic molecular evolution of life. Which molecule was not present in Millier's experiment?

Which of the following constitutes irreversible colloidal system in water as dispersion medium?

A substance X, which is an oxide of a group 2 element, is used intensively in the cement industry. This element is presented in bones also. On treatment with water it forms a solution which turns red litmus blue. Identify X and also write the chemical reactions involved.

Ice begins to separate at -0.744^@C from a solution containing 2.4 g of non-electrolyte solute in 100 g of water. Calculate the molecular weight of non-electrolyte and osmotic pressure which the solution would exert at 20^@C ?

Say which of the following is true and false Oxidation involve loss of oxygen.

in mitochondrial electron transport system,for every two pairs of electrons that pass from and molecules through a sequential series of cytochrome enzymes to molecular oxygen generate: