To solve the problem, we need to identify the vitamin responsible for the coagulation of blood.
1. Understanding Coagulation:
Coagulation refers to the process of blood clotting, where blood changes from a liquid to a gel, preventing excessive bleeding after injury. This process involves a series of proteins in the blood, known as clotting factors, which are activated in a cascade to form a blood clot.
2. Role of Vitamin K:
Vitamin K plays a crucial role in blood coagulation. It is required for the synthesis of certain clotting factors in the liver, particularly prothrombin (factor II) and factors VII, IX, and X. These clotting factors are essential for the formation of a blood clot. Without sufficient vitamin K, blood clotting is impaired, leading to excessive bleeding.
3. Final Answer:
The vitamin responsible for blood coagulation is Vitamin K.
Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines.
(i) (CH3 )2CHNH2 (ii) CH3 (CH2 )2NH2 (iii) CH3NHCH(CH3 )2
(iv) (CH3 )3CNH2 (v) C6H5NHCH3 (vi) (CH3CH2 )2NCH3 (vii) m–BrC6H4NH2
Give one chemical test to distinguish between the following pairs of compounds.
(i) Methylamine and dimethylamine
(ii) Secondary and tertiary amines
(iii) Ethylamine and aniline
(iv) Aniline and benzylamine
(v) Aniline and N-methylaniline
Account for the following:
(i) pKb of aniline is more than that of methylamine.
(ii) Ethylamine is soluble in water whereas aniline is not.
(iii) Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.
(iv) Although amino group is o– and p– directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.
(v) Aniline does not undergo Friedel-Crafts reaction.
(vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines. (vii) Gabriel phthalimide synthesis is preferred for synthesising primary amines.