Chemistry-

General

Easy

Question

# Identify(A) and (B) in the reaction:

## The correct answer is:

### Acidic breaks the double bond and alsooxidises alcohol to ketone, whereas PCC only oxidises alcohol to ketone. So the answer is (c)

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### Two coherent sources *S*_{1} and *S*_{2} are separated by a distance four times the wavelength of the source. The sources lie along *y* axis whereas a detector moves along + x-axis. Leaving the origin and far off points the number of points where maxima are observed is

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### Two coherent sources separated by distance *d* are radiating in phase having wavelength . A detector moves in a big circle around the two sources in the plane of the two sources. The angular position of *n* = 4 interference maxima is given as

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### A beam with wavelength *l* falls on a stack of partially reflecting planes with separation *d*. The angle that the beam should make with the planes so that the beams reflected from successive planes may interfere constructively is (where *n* =1, 2, ……)

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### Two ideal slits and are at a distance *d* apart and illuminated by light of wavelength passing through an ideal source slit *S* placed on the line through as shown. The distance between the planes of slits and the source slit is *D*. A screen is held at a distance *D* from the plane of the slits. The minimum value of *d* for which there is darkness at *O* is

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### A monochromatic beam of light falls on YDSE apparatus at some angle (say ) as shown in figure. A thin sheet of glass is inserted in front of the lower slit . The central bright fringe (path difference = 0) will be obtained

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### In an interference arrangement similar to Young's double slit experiment, the slits are illuminated with coherent microwave sources each of frequency . The sources are synchronized to have zero phase difference. The slits are separated by distance *d *= 150 *m*. The intensity *I* is measured as a function of , where is defined as shown. If *I*_{0} is maximum intensity, then for is given by

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