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