UHS MDCAT 2019 PAPER (PART 10) 1. Which of the following reagent is required for preparation of acyl chloride (CH3-COCI) from ethanoic acid? HCl PCl5 CH3Cl POCl3 2. The given diagram shows the enthalpy changes during a chemical reaction. This diagram represents: An exothermic reaction A non spontaneous process An Isothermic process An endothermic reaction 3. Ionization energy decreases down the group from top to bottom due to: Increase in proton number Increase in shielding effect of the intervening electrons Increase in atomic mass Decrease in atomic size 4. Free Nitrogen and oxygen are present in atmosphere but they do not react with each other under normal conditions, because: Oxygen is very inactive Oxygen is found in less concentration Nitrogen requires a catalyst Nitrogen is highly inactive gas 5. Which derivative of benzene shows maximum reactivity in electrophilic substitution reactions? Methyl benzene Benzaldehyde Nitrobenzene Benzoic acid 6. Which of the following reactions is used for the production of alcohols on industrial scale? Hydroxylation of alkenes Hydration of alkenes Hydrohalogenation of alkenes Hydrogenation of alkenes 7. The pH of 10-2 M aqueous solution of sodium hydroxide is 12 10 13 14 8. In the reaction sequence: Product D will be Mixture of methanol and ethanol 1-Propanol Propanoic acid 2-Propanol 9. What is the measure of activation energy in an endothermic reaction? The energy of activation of forward reaction is less than that of backward reaction The energy of activation of forward-backward reaction is same The energy of activation of backward reaction is more than that of forward reaction The energy of on of backward reaction is less than that of forward reaction 10. The structure of Malefic acid and Fumaric acid, both have chemical formula these acids is shown below: Maleic acid and Fumaric acid are: Cis-trans isomers Position isomers Structural isomers Metamers Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
in question no 10
the type of energy reduced by the enzymes for biological reactions to occur is called ACTIVATION ENERGY
at here the correct answer is active energy which is wrong
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