Regarding Stability Of Atom

Which option is correct regarding stability of following conformations?

Which of the following is correct regarding stability of the following pair of species ?

Which of the following statement is/are correct regarding stability of sol ? Lyophilic sols are stabilised due to a layer of solvent around sol particles. (ii) Lyophobic sols are stabilised due to presence of charge. (iii) Addition of lyophilic brings in more stability to lyophobic (iv) Addition of lyophobic brings in more stability to lyophobic.

Which of the following statement is true regarding the stability of NH_(4)^(+) and CH_(3)^(+) ?

Which of the following statement is true regarding the stability of NH_(4)^(+) and CH_(3)^(+) ?