The conformation of isopentane having maximum torsional and maximum Vander waal strain is:

Which point on the potential energy diagram is represented by Newman projection shown here?

In the Newman projection for $2,2$-Dichlorobutane, which one statement is correct?

${\mathrm{CH}}_3-\stackrel{⊝}{\mathrm{C}}{\mathrm{H}}_2$ ${\mathrm{CH}}_3-\stackrel{⊝}{\mathrm{C}}{\mathrm{H}}_2-{\mathrm{CH}}_3$        

        ($\mathrm{i}$)                   ($\mathrm{ii}$)                                                     ($\mathrm{iii}$)
Which of the following orders is correct for the stability of these carbanions?

${\mathrm{CH}}_3-\stackrel{⊝}{\mathrm{C}}{\mathrm{H}}_2$ ${\mathrm{CH}}_2=\mathrm{CH}-{\stackrel{⊝}{\mathrm{CH}}}_2$ 

      ($\mathrm{i}$)                        ($\mathrm{ii}$)                         ($\mathrm{iii}$)

Which of the following orders is correct for the stability of these carbanions?

Which of the following orders is correct for the stability of these carbanions?                   

Which of the following orders is correct for the stability of these carbanions?

Which of the following orders is correct for the stability of these carbanions?

Which of the following orders is correct for the stability of these carbanions?