d. the same elemental composition, but different molar masses. e. the same eleme

Question

d. the same elemental composition, but different molar masses. e. the same elemental composition, but the atoms are linked in different ways. 2. Which of the following statements concerning isomers are c orrect? 1. Two types of stereoisomers exist: geometric isomers and optical isomers. 2. Enantiomers have different melting and boiling points. 3. Optical isomers have non-superimposable mirror images. a. 1 only b. 2 only c. 3 on d. 1 and 2 e. 1 and 3 3. Which one of the following molecules has a chiral center? H-C-CH3 H-C-FH 14) c3) b. (2) C. (3) d. (4) e. (5) For which one of the following molecules do geometric isomers exist? a. HiC-CH3 b. H C-CH Br 4. BrHC=CBT2 What is the general formula for an alkene? b. CnH2n e. -5. a. CH2n-2 SAMSUNG 5 6 7 8 9

Explanation / Answer

2. Ans : e

3. Ans : a (carbon is attached to four different groups. Therefore this carbon is called asymmetric carbon. Therefore the molecule is chiral).

4. Ans : d (In double bond carbon is attached to different groups, geometrical isomerism exist).

5. Ans : b.

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