ROAD MAP. A, B, and C are alkyl iodides with a molecular formula of C6H11I. Both compounds A and B react with Na - OCH3 in DMSO to give the same trisubstituted alkene DO. Both compounds B and C react with DBU in DMF to give disubstituted alkene E. Compound A reacts very slowly with CH3OH to give ether F and a small amount of alkene D. Compound B reacts much faster with CH3OH than compound A to give a different ether G along with alkene D. However, both compounds A and B do not react with strong nucleophiles like NaN3. In contrast, compound C readily reacts with NaN3 in DMF to give compound H. Give the structures of compounds A-H on the next page.

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Explanati

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

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