20 verified questions · ~18 minutes · answer key checked against the official NTA final key across multiple sources. Text-only questions (diagram-based excluded until they can be shown properly).
When a concentrated solution of sulphanilic acid and 1-naphthylamine is treated with nitrous acid (273 K) and acidified with acetic acid, the mass (g) of 0.1 mole of product formed is : (Given molar mass in g mol⁻¹ H : 1, C : 12, N : 14, O : 16, S : 32)
The d-orbital electronic configuration of the complex among [Co(en)₃]³⁺, [CoF₆]³⁻, [Mn(H₂O)₆]²⁺ and [Zn(H₂O)₆]²⁺ that has the highest CFSE is :
Answers are revealed after you attempt — that's what makes the diagnosis honest.