Cyanide ion acts as an ambident nucleophile. From which end, it acts as a stronger nucleophile in aqueous medium and why?

Which of the following can act as an nucleophile ?

Which is a better nucleophile, a bromide ion or an iodide ion and why?

Between Cr^(2+) and Fe^(2+) which is a stronger reducing, agent in aqueous solution and why?

Write balance chemical equations of two reactions in which KMnO_(4) acts as an oxidising agent in the acidic medium.

Refer to the given graph showing state of ionisation of zwitterion. Select the correct statements regarding zwitterion. (i) Zwitterions can be formed from compunds that contain both acid groups and basic groups in their molecules. (ii) A zwitterion can act either as proton donor or proton acceptor. (iii) A monoamine monocarboxylic alpha -amino acid is a acid at high pH as both the groups (amino and carboxyl) lose a proton. (iv) Amino acids in solution at neutral pH exist predominantly as dipolar ions, the amino group is protonated (-NH_(3)^(+)) and the carboxyl group is deprotonated (-COO^(-)) .

Which of the following displaces Br from an aqueous solution containing bromide ion.

Which of the following ions will exhibit colour in aqueous solution and why? Give reason Cu^+, Ni^(2+), V^(3+)