page 05 11. Which line in the table is correct for a carbon‑carbon single bond in an alkane? Overlap of atomic orbitals Symmetry of molecular orbital A end‑on symmetrical B end‑on asymmetrical C side‑on symmetrical D side‑on asymmetrical 12. Which line in the table is correct for a chromophore that absorbs blue‑green light? Movement of electrons Colour observed A HOMO to LUMO blue‑green B LUMO to HOMO blue‑green C HOMO to LUMO red D LUMO to HOMO red 13. Which of the following compounds does not exhibit hydrogen bonding between its molecules? A Ethanol B Ethylamine C Ethanoic acid D Ethoxyethane 14. A haloalkane can be converted into a ketone by reaction with A aqueous sodium hydroxide followed by oxidation B ethanolic potassium cyanide followed by hydrolysis C ethanolic sodium hydroxide followed by addition D potassium in ethanol followed by substitution. [Turn over page 06 15. CH3CH2CH(CH3)CHO LiAlH4 X The organic product X is A 2‑methylbutanal B 2‑methylbut‑1‑ene C 2-methylbutan-1-ol D 2-methylbutanoic acid. 16. CH3CH2CH2COOH NH3 X heat Y  +  H2O The formula for Y will be A CH3CH2CH2CN B CH3CH2CH2CONH2 C CH3CH2CH2CH2NH2 D CH3CH2CH2COONH4 17. Which of the following compounds is not an isomer of methoxypropane? A CH3CH2COCH3 B CH3CH2OCH2CH3 C CH3CH(OH)CH2CH3 D CH3CH(CH3)CH2OH 18. Which of the following compounds can exhibit geometric isomerism? A CH2CHBr B CHClCHCH3 C CH3CH2CHCCl2 D CH3C(CH3)CHCH3 19. In which of the following techniques will the test compound always be destroyed? A Mass spectrometry B Infrared spectroscopy C Melting point analysis D Proton NMR spectroscopy