thế ĝiven chôičêš för eäch itém. 1. Which of the following compounds is a functional group isomer of C2H5OH, ethanol (ethyl alcohol)? A. ethanal, CH3CHO B. dimethyl ether, (CH3)2O C. acetic acid, CH3COOH D. diethyl ether, (C2H5)2O 2. Two isomeric forms of a saturated hydrocarbon A. have the same structure. B. have different compositions of elements. C. have the same molecular formula. D. react vigorously with one another. 3. The reaction of water with alkene to produce an alcohol is alan C. Combustion D. Addition reaction. A. Saponification B. Condensation 4. The organic starting materials for the preparation of an ester could be C. a ketone and alcohol D. alkane and aldehyde A. an acid and alcohol B. water and oxygen H,SO, 5. What is the product of the following reaction? R R'OH +] A. ester B. aldehyde C. alcohol D. alkyne 6. - it The isomerism shown is A. chain B. functional C. positional D. geometric 7. - HHH The isomerism shown is H-C-C-C-H H-C-H C. positional D. geometric A. chain B. functional 8. Short chain alkanes are prepared through A. Saponification B. Hydration 9. Saponification of fats needs a strong A. halogen B. catalyst C. Catalytic cracking D. Oxidation to proceed to completion. C. acid D. base 10. Fruits have pleasant odour because of the presence of A. ethers B. esters C. ethyl D. aldehyde

1. There are five structural isomers for hexane, C6H₁4. Draw the five structures using simplified structural formulae. For example, one of the isomers of butane, C4H₁0, could be drawn as CH3CH₂CH₂CH3. Use the same sort of format for the other questions on this page. 2. STRUCTURAL ISOMERISM 3. Draw as many structural isomers as possible for C3H8O. Draw as many structural isomers as you can for CH₂0 containing a benzene ring. 4. Draw as many structural isomers as you can for C4H8O₂ containing the group

a. Which of the following compounds have the same empirical formula?(1) But-2-ene(2) Propane(3) EtheneA. (1) and (2) onlyB. (1) and (3) onlyC. (2) and (3) onlyD. (1), (2) and (3) b. Which of the following statements concerning homologous series is INCORRECT?A. Members of a series have identical chemical properties.B. Members of a series have the same general formula.C. Each member differs from the next by a −CH2− group.D. Members of a series show a gradual change of physical properties.

Consider the following molecule. How many tertiary carbons are in this molecule? H₂N. 04 NH OH NH. CH3 OH

Identify the class of organic compound (alcohol, carboxylic acid, halocarbon, alcohol, ketone, ester, ether).

for molecule 2,6-dimethyloct-2-ene  draw/print the structural formula of your molecule (expanded or condensed) and indicate the functional groups present by highlighting, circling, or color-coding each and labeling the group.  what is the  The molecular formula The molar mass (use atomic masses from the periodic table to the hundredths place for each element)

2. The Nobel Prize in chemistry for 2,000 was nominated by Heeger. Macdiarmid and Shirikawa with “Discovery and development of conductive polymer". How can plastic become conductive? Explain by using polyacetylene.

The correct name for NaHCO3 is? A. Sodium hydride monocarbon trioxide B. Sodium carbonate C. Sodium hydrocarbonite D. Sodium bicarbonate