Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction ?

For the following reactions :

(A)  CH₃CH₂CH₂Br + KOH $$ \to $$
                 CH₃CH $$=$$ CH₂ + KBr + H₂O

Which of the following statements is correct?

Consider the nitration of benzene using mixed conc.H₂SO₄ and HNO₃. If a large amount of KHSO₄ is added to the mixture, the rate of nitration will be

The pair of electrons in the given carbanion, CH₃C $$ \equiv $$ C^$$-$$, is present in which of the following orbitals?