ETEA MDCAT Past Paper 2024 101- The homolytic fission of C-H bond in an alkane result in? A. Alkyl free radicalB. CarbanionC. CarbocationD. Methylpropane View Answer Answer : A. Alkyl free radical Description 102- Addition of HBr to isobutylene mainly gives? A. isobutyl bromideB. n-butyl bromideC. sec-butyl bromideD. tert-butyl bromide View Answer Answer : D. tert-butyl bromide Description 103- Dehydrohalogenation of alkylhalide is carried out in presence of: A. Alcoholic KOHB. Aqueous KOHC. Conc. H₂SO₄D. Zn dust View Answer Answer : A. Alcoholic KOH Description 104- The pK₆ of n-propyl amine is: A. 3.24B. 3.28C. 3.32D. 3.35 View Answer Answer : D. 3.35 Description 105- The carbon atom carrying positive charge and attached to three other atoms or groups is called? A. CarbanionB. CarbenC. CarbocationD. Oxonium View Answer Answer : C. Carbocation Description 106- Which of the following has the highest boiling point? A. ethyl alcoholB. isopropyl alcoholC. n-propyl alcoholD. tert-butyl alcohol View Answer Answer : C. n-propyl alcohol Description 107- The reaction of an alcohol with sodium produces? A. AldehydeB. AlkoxideC. EthaneD. Ethene View Answer Answer : B. Alkoxide Description 108- Oxidation of secondary alcohol gives? A. Carboxylic acidB. EtherC. KetoneD. Phenol View Answer Answer : C. Ketone Description 109- Which aldehyde is more reactive towards nucleophilic addition? A. AcetaldehydeB. ButyraldehydeC. PropionaldehydeD. Formaldehyde View Answer Answer : D. Formaldehyde Description 110- Acetic acid can be prepared by the hydrolysis of? A. EthanalB. EthanolC. Methanoic acidD. Methyl cyanide View Answer Answer : D. Methyl cyanide Description 111- Protein present in haemoglobin has ______ structure. A. PrimaryB. SecondaryC. TertiaryD. Quaternary View Answer Answer : D. Quaternary Description 112- In competitive inhibition, the inhibitor: A. Binds with substrateB. Competes with enzymeC. Competes with substrateD. Irreversibly binds with enzyme View Answer Answer : C. Competes with substrate Description 113- How many moles are there in 60g of sodium hydroxide (NaOH)? A. 2B. 4C. 6D. 8 View Answer Answer : A. 2 Description 114- Heating 24.8g of copper carbonate (CuCO₃) in a crucible produced only 13.9g of copper oxide (CuO). What is the percentage yield of copper oxide? A. 81.79%B. 83.98%C. 86.87%D. 89.68% View Answer Answer : A. 81.79% Description 115- Efficiency of chemical reaction can be checked by calculating: A. Actual yieldB. Theoretical yieldC. Percentage yieldD. Amount of the reactant unused View Answer Answer : C. Percentage yield Description 116- Actual yield will reach the ideal (theoretical) value if the % yield of the reaction is, A. 10%B. 50%C. 90%D. 100% View Answer Answer : D. 100% Description 117- Which of the following sub-shell does not exist? A. 1pB. 1sC. 5dD. 6f View Answer Answer : A. 1p Description 118- The splitting of spectral lines in magnetic field is: A. Aufbau principleB. Pauli exclusion principleC. Stark effectD. Zeeman effect View Answer Answer : D. Zeeman effect Description 119- Which element has the electronic configuration of noble-gas notation [Kr], 5S², 4d²? A. MoB. SeC. SrD. Zr View Answer Answer : D. Zr Description 120- Total number of electron pairs present in the valence shell of central atom in water are: A. 2B. 3C. 4D. 5 View Answer Answer : C. 4 Description 1 2 3 4 5 6 7 8 9 10
