RRB NTPC 2025 Organic Chemistry QuestionsBy biplabsrk35@gmail.com / March 31, 2025 RRB NTPC 2025 Organic Chemistry Questions 1 / 30 What is the hybridization of carbon in benzene? sp sp² sp³ dsp² 2 / 30 Which compound is used in the preparation of dynamite? Glycerol Nitroglycerin TNT RDX 3 / 30 Which scientist first synthesized urea artificially? Lavoisier Wöhler Faraday Dalton 4 / 30 What is the valency of carbon in organic compounds? 2 3 4 5 5 / 30 Which polymer is formed from vinyl chloride? Polyethylene PVC Teflon Nylon 6 / 30 What is the main component of biogas? CO₂ Methane Hydrogen Nitrogen 7 / 30 What is denatured spirit made of? Pure ethanol Ethanol + methanol Ethanol + pyridine Ethanol + water 8 / 30 Which artificial sweetener is derived from toluene? Aspartame Saccharin Sucralose Stevia 9 / 30 What is used as a fire extinguisher under the name “pyrene”? Carbon tetrachloride Water CO₂ Sand 10 / 30 Which compound is used to preserve biological specimens? Methanol Formalin Ethanol Acetone 11 / 30 What is the chemical name for gammaxene (an insecticide)? Benzene hexachloride DDT Chloroform Acetylene 12 / 30 Which compound is used in tear gas? Benzene Chloroacetophenone Naphthalene Formaldehyde 13 / 30 What is used to lower the freezing point in car radiators? Methanol Ethylene glycol Glycerol Acetone 14 / 30 Which explosive is also known as “Research Department Explosive”? TNT RDX Nitroglycerin Ammonal 15 / 30 What is the primary component of natural rubber? Polyethylene Isoprene Vinyl chloride Styrene 16 / 30 Which alcohol is also known as wood spirit? Ethanol Methanol Propanol Butanol 17 / 30 What is the main component of marsh gas? Ethane Methane Propane Butane 18 / 30 Which compound is used as a sweetener and in medicines? Naphthalene Glucose Benzene RDX 19 / 30 Glycerol is used in the production of: Dynamite Plastic Vinegar Methane 20 / 30 What is vinegar chemically? 100% acetic acid 10% acetic acid 5% formic acid 20% citric acid 21 / 30 Which alcohol is used in alcoholic beverages? Methanol Ethanol Propanol Butanol 22 / 30 Chloroform (CHCl₃) is commonly used as: A fuel An anesthetic A polymer A preservative 23 / 30 What is the temperature of an oxy-acetylene flame used in welding? 1500°C 2500°C 3500°C 4500°C 24 / 30 Which gas is used for artificial ripening of fruits? Methane Acetylene Ethylene Propane 25 / 30 What is the primary use of methane (CH₄)? Making plastics Fuel for heat production Welding Preservative 26 / 30 Which mechanism involves a two-step process where the reaction rate depends only on the substrate concentration? SN² E1 E2 E1CB 27 / 30 SN¹ reactions are most favorable for which type of halides? Methyl halides Primary halides Secondary halides Tertiary halides 28 / 30 In which type of reaction does a nucleophile attack an electron-deficient molecule? Electrophilic reaction Nucleophilic reaction Free radical reaction Elimination reaction 29 / 30 Which of the following is an example of an electrophile? OH⁻ NH₃ BF₃ CN⁻ 30 / 30 What is the mechanism called when a chemical reaction occurs through the formation of free radicals? Polar mechanism Free radical mechanism Nucleophilic mechanism Electrophilic mechanism Your score isThe average score is 0% 0% Restart quiz
