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