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