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