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