Ncert-class 11-chemistry – unit 8-Organic Chemistry – Some Basic Principles and Techniques Welcome to your Ncert-class 11-chemistry - unit 8-Organic Chemistry – Some Basic Principles and Techniques 1. The trends in physical properties of compounds within a homologous series are due to: functional group change in weight change in size Both change in size and change in weight None 2. Which of the following is a characteristic of homologous series? All the members have same functional group All the members show different chemical properties All the members can be represented by same general formula Both All the members can be represented by same general formula and All the members have same functional group None 3. Which term is the best match for the color of a chemical substance students make note of: quantitative data inference observation qualitative data None 4. Homologous series is____________. a series of compounds with same molecular formula and different structural formulae. a series of compounds in which different functional group substitutes for hydrogen in a carbon chain. a series of compounds in which the same functional group substitutes for hydrogen in a carbon chain. a series of compounds with same molecular formula but different functional groups. None 5. The compound of the molecular formula, $$C_{6}H_{14} $$has two tertiary carbons. Its IUPAC name is: 2 − methylpentane 2 , 3 −dimethylbutane 2 , 2 −dimethylpentane n-hexane None 6. In which of the following case does withdrawing effect dominates donating effect? -OH -Cl -OCH3 -NHCH3 None 7. In which of the following inductive effect is possible: Butanal Cyclohexane Butane Benzene None 8. Carbon present in the compounds is oxidised to carbon dioxide which: turns solution to green has no effect on solution turns lime water milky turns blue litmus red None 9. 2𝐻+𝐶𝑢𝑂→𝑋+𝑌2The compound 𝑋X and 𝑌Y are: H_{2},Cu $$H_{2},CuO$$ None $$H_{2}O,Cu$$ Both None 10. Given two compounds, one more polar than the other, which one will move up the silica stationery phase higher than the other in TLC? Non polar compound Polar compound None will move Both will move equally None 11. Groups that can show both +M and -M effect: All of these phenyl -NO vinyl None 12. The most common characteristics of homologous series is increase in the number of: butyl units methylene units methyl units propyl units None 13. Which one of these shows least -I effect: $$-NH_{3}^{+}$$ $$-OH_{2}^{+}$$ $$-NO_{2}$$ $$-F$$ None 14. Which of the following is the best evidence for the validity of a proposed reaction mechanism? The product proposed by the mechanism was formed. The same mass of catalyst is present at the end of the reaction as it was at the beginning. An experimenter found spectrophotmetric data consistent with the presence of a reaction intermediate in the proposed mechanism. Reaction rate data suggests that the rate of the reaction is approximately what is expected. None 15. In the detection test of carbon and hydrogen with cupric oxide, hydrogen is oxidized to __________. water lime water methane hydride None 16. Carbon and hydrogen are detected by heating the organic compound with ________. cupric oxide sulphur dioxide magnesium oxide zinc oxide None 17. Group showing strongest +M effect:$$-O^{-}$$ $$-O^{-}$$ $$-NHCH_{3}$$ $$-NH_{2}$$ $$-N(CH_{3})_{2}$$ None 18. In the detection test of carbon and hydrogen with cupric oxide, carbon is oxidized to : carbonic acid copper sulphate carbon monoxide carbon dioxide None 19. Among the following which has greatest -I effect? -F -NO2 -OH -NH2 None 20. The order of -I effect of orbitals is: 𝑠𝑝>𝑠𝑝² >𝑠𝑝³ 𝑠𝑝³>𝑠𝑝²>𝑠𝑝 𝑠𝑝² >𝑠𝑝³>𝑠𝑝 𝑠𝑝² >𝑠𝑝>𝑠𝑝³ None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
