The hydrolysis of p-chloromitrobenzene requiries it to be heated with NaOH solution at `170^(@)C` but the hydrolysis of 1-chloro-2,4,6-trinitribenzene requires only warming with water. Explain these observations.

Arrange the following compounds in order increasing tendency of alkaline hydrolysis : 1- chloro-2, 4, 6-trinitrobenzene (I), 1-chloro-4-nitrobenzene (II), 1-chloro-3-nitrobenzene (III), 1-chloro-2, 4-dinitrobenzene (IV), chlorobenzene (V).

Water of volume 2 L in a container is heated with a coil of 1 kW at 27^(@)C . The lid of the container is open and energy dissipates at rate of "160 J . S"^(-1) . In how much time (in minutes) temperature will rise from 27^(@)C to 75^(@)C ? ["Given specific heat of water is 4.2 kJ . kg"^(-1)]

Heat required to vaporise 1 g of water at 100^(@)C and 1 atm is 2.26 kJ. What is the enthalpy of vaporisation of water at this temperature and pressure?

When 5.0 ml of 0.1 M HCI solution is mixed with 5.0 ml of a 0.1 M NaOH solution, the temperature of solution increases by 2 o C. Which of the following can be predicted accurately from this observation?

Find the values of p for which the equations 3x-4y=1 and 9x+py=2 will have only one set of solutions.

Activation energy for the acid catalysed hydrolysis of sucrose is 6.22 kJ-mol^(-1) , while the activation energy is only 2.15kJ-mol^(-1) when hydrolysis is catalysed by the enzyme sucrase. Explain.

Find the degree of hydrolysis, pH of the solution and hydrolysis constant for a 0.001(M) NH_4Cl solution at 25^(@)C provided K_b[NH_3]=1.8xx10^(-5)

1-bromobutane is prepared by heating 1-butanol with a mixture of NaBr and H_(2)SO_(4) but not with NaBr only. Explain.