Class 10 Practice Level 3 – Carbon and its Compounds – Set – 1 Leave a Comment / By anushka kumari / July 30, 2024 Class 10 Practice Level 3 – Carbon and its Compounds – Set – 1 Total questions: 15 1. Which type of reaction mechanism involves the addition of a nucleophile to an electrophilic carbon center? Topic: Reaction Mechanisms Electrophilic addition Nucleophilic substitution Electrophilic substitution Nucleophilic addition None 2. Which of the following compounds are not structural isomers? Topic: Structural Isomerism Butane and Isobutane Propanol and Propanoic acid Ethanol and Dimethyl ether 1-Butene and 2-Butene None 3. What is the hybridization of the central carbon atom in allene (C₃H₄)? Topic: Hybridization sp sp² sp³ sp² and sp None 4. Which reagent would most likely undergo electrophilic addition with an alkene? Topic: Electrophilic Addition HCl NaOH NH₃ C₆H₆ None 5. Which of the following steps is the rate-determining step in the SN1 reaction mechanism? Topic: Reaction Mechanisms Formation of the carbocation intermediate Attack of the nucleophile on the carbocation Loss of a leaving group Formation of the transition state None 6. Which of the following compounds is not considered aromatic? Topic: Aromatic Compounds Benzene Toluene Cyclooctatetraene Naphthalene None 7. Which conformation of ethane is the most stable? Topic: Conformational Analysis Eclipsed Staggered Gauche Anti None 8. Which reagent is commonly used to oxidize primary alcohols to aldehydes? Topic: Organic Synthesis KMnO₄ PCC H₂SO₄ LiAlH₄ None 9. Which type of reaction mechanism involves the homolytic cleavage of a bond to form free radicals? Topic: Reaction Mechanisms Electrophilic addition Nucleophilic substitution Electrophilic substitution Free radical substitution None 10. Which spectroscopic technique is used to determine the molecular mass of an organic compound? Topic: Spectroscopy NMR spectroscopy IR spectroscopy UV-Vis spectroscopy Mass spectrometry None 11. Which reagent would most likely undergo electrophilic substitution with benzene? Topic: Electrophilic Substitution HBr NaOH Br₂/FeBr₃ CH₄ None 12. Which of the following intermediates is formed during the addition of HBr to propene? Topic: Reaction Intermediates Carbocation Carbanion Free radical Carbenium ion None 13. Which conformation of butane has the highest energy? Topic: Conformational Analysis Eclipsed Staggered Gauche Anti None 14. Which reagent is commonly used to reduce aldehydes to primary alcohols? Topic: Organic Synthesis KMnO₄ PCC H₂SO₄ NaBH₄ None 15. Which of the following compounds follows Hückel's rule for aromaticity? Topic: Aromatic Compounds Cyclobutadiene Cyclooctatetraene Pyridine Cyclopentadiene None 1 out of 15 Time's up
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