NEET 2019
For the following questions answer them individually
Among the following, the reaction that proceeds through an electrophilic substitution, is :
What is the correct electronic configuration of the central atom in $$K_4[Fe(CN)_6]$$ based on crystal field theory ?
Which of the following reactions are disproportionation reaction ?
(a) $$2Cu^+ \rightarrow Cu^2 + Cu^0$$
(b) $$3MnO_4^{2-} + 4H^+ \rightarrow 2MnO_4^ {-} + MnO_2 + 2H_2O$$
(c) $$2KMnO_4 {_\rightarrow^\triangle} K_2MnO_4 + MnO_2 + O_2$$
(d) $$2MnO_4^ - + 3Mn^{2+} + 2H_2O \rightarrow 5MnO_2 + 4H^\oplus$$
Select the correct option from the following:
For the cell reaction
$$2Fe^{3+} (aq) + 2I^-(aq) \rightarrow 2Fe^+ (aq) + I_2(aq)$$
$$E_{cell}^\ominus = 0.24 V$$ at 298 K. The standard Gibbs energy $$(\triangle_rG^\ominus)$$ of the cell reaction is:
[Given that Faraday constant $$F = 96500 C mol^{-1}]$$
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor M is:
