One mole of an ideal monoatomic gas is subjected to changes as shown in the graph. The magnitude of the work done (by the system or on the system) is __________ J (nearest integer)

Given ; $$\log2=0.3$$

$$\ln10=2.3$$

Maximum number of isomeric monochloro derivatives which can be obtained from 2,2,5,5-tetramethylhexane by chlorination is _____________

Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the following is ____________.

A. $$\mathrm{T_4 > T_3 > T_2 > T_1}$$

B. The black body consists of particles performing simple harmonic motion.

C. The peak of the spectrum shifts to shorter wavelength as temperature increases.

D. $${{{T_1}} \over {{v_1}}} = {{{T_2}} \over {{v_2}}} = {{{T_3}} \over {{v_3}}} \ne $$ constant

E. The given spectrum could be explained using quantisation of energy.

Sum of $$\pi$$-bonds present in peroxodisulphuric acid and pyrosulphuric acid is ___________