Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Dissolved substances can be removed from a colloidal solution by diffusion through a parchment paper.
Reason (R) : Particles in a true solution cannot pass through parchment paper but the colloidal particles can pass through the parchment paper.
In the light of the above statements, choose the correct answer from the options given below :
Outermost electronic configurations of four elements A, B, C, D are given below :
(A) $$3 s^{2}$$
(B) $$3 s^{2} 3 p^{1}$$
(C) $$3 s^{2} 3 p^{3}$$
(D) $$3 s^{2} 3 p^{4}$$
The correct order of first ionization enthalpy for them is :
An element A of group 1 shows similarity to an element B belonging to group 2. If A has maximum hydration enthalpy in group 1 then B is :
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Boron is unable to form $$\mathrm{BF}_{6}^{3-}$$.
Reason (R) : Size of B is very small.
In the light of the above statements, choose the correct answer from the options given below :