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