GATE CY 2014 Question Paper (02-Feb-2014) (Shift-1)

The major product formed in the following reaction is

The major products X and Y formed in the following reaction sequence are

The major products X and Y formed in the following reaction sequence are

Given the fact that 1,3-butadiene has a UV absorption of 217 nm, the absorption wavelength (in nm) for the conjugated system shown below is _______

(Use these absorption values for auxochromic groups:
alkyl: +5; exo-cyclic double bond: +5; every additional conjugated C = C: +30 )

The m/z value of the detectable fragment formed by McLafferty like rearrangement of the following compound in mass spectrometer is ________