A 'H NMR signal is observed at 141.0 Hz (downfield of TMS) on a 1.50 × 10²-MHz instrument. a) What is the observed chemical shift in parts per million (ppm)? Chemical shift is 0.94 ppm b) What is the chemical shift, in parts per million (ppm), if the sample is analyzed with a 500.0-MHz instrument? Chemical shift is 0.282 ppm Incorrect c) Where will the proton signal appear, in hertz, if the sample is analyzed with a 500.0-MHz instrument? The downfield signal is Hz Incorrect

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Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.