Which statement is FALSE? Molecules that contain a chiral carbon will rotate plane-polarized light. If one molecule rotates plane-polarized light clockwise 10°, its enantiomer will rotate plane-polarized light counterclockwise by 10°. The D- and L- designation of sugars is determined by the chiral atom farthest from the most oxidized carbon. All sugars designated with a D- prefix will rotate plane-polarized light in a clockwise direction. Dextrorotatory sugars rotate plane-polarized light clockwise and are designated by a plus sign (+).

this statement is FALSE

All sugars designated with a D- prefix will rotate plane-polarized light in a clockwise direction

Explanation:

D and L designation of sugar is usually given to them based on the -OH group position. If present on the right side , it is always D and if present on the left side it is usually L. so we can say that D & L designation has nothing to do with light rotation whatsoever. Although a plane polarized light will be rotated by the sugar but the rotated direction can only be ascertain by experiment.

the statement is  FALSE

All sugars designated with a D- prefix will rotate plane-polarized light in a clockwise direction

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).