B reacts with Hydroxyl amine but does not give Tollen's test. Identify A and B.

Which of the following vitamin is helpful in delaying the blood clotting?

The orbital having two radial as well as two angular nodes is :

For a chemical reaction A + B ⇌ C + D

($${\Delta _r}{H^\Theta }$$ = 80 kJ mol^$$-$$1) the entropy change $${\Delta _r}{S^\Theta }$$ depends on the temperature T (in K) as $${\Delta _r}{S^\Theta }$$ = 2T (J K^$$-$$1mol^$$-$$1).

Minimum temperature at which it will become spontaneous is ___________ K. (Integer)