In the following reaction :

The compounds A and B respectively are :

The reaction of with bromine and KOH gives RNH₂ as the end product. Which one of the following is the intermediate product formed in this reation?

The number of N atoms in 681 g of C₇H₅N₃O₆ is x $$\times$$ 10²¹. The value of x is (N_A = 6.02 $$\times$$ 10²³ mol^$$-$$1) (Nearest Integer)

The longest wavelength of light that can be used for the ionisation of lithium atom (Li) in its ground state is x $$\times$$ 10^$$-$$8 m. The value of x is ___________. (Nearest Integer).

(Given : Energy of the electron in the first shell of the hydrogen atom is $$-$$2.2 $$\times$$ 10^$$-$$18 J ; h = 6.63 $$\times$$ 10^$$-$$34 Js and c = 3 $$\times$$ 10⁸ ms^$$-$$1)