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