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