Write the IUPAC name of the given compound.

Which of the following reactions is S_N¹ type?

On heating Cu turnings with conc. HNO₃, a brown colored gas is evolved which on cooling dimerises. Identify the gas.

When a co-ordination compound CoCl₃⋅4NH₃ is mixed with AgNO₃, 1 mole of AgCl is precipitated per mole of the compound. Write

(i) Structural formula of the complex

(ii) IUPAC name of the complex

Show that in a first order reaction, time required for completion of 99.9% is 10 times that of half-life (t_1/2) of the reaction.

OR

Derive integrated rate equation for rate constant for a first order reaction.