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 CH3Cl POCl3 PCl5 2. The given diagram shows the enthalpy changes during a chemical reaction. This diagram represents: An endothermic reaction An Isothermic process An exothermic reaction A non spontaneous process 3. Ionization energy decreases down the group from top to bottom due to: Decrease in atomic size Increase in shielding effect of the intervening electrons Increase in proton number Increase in atomic mass 4. Free Nitrogen and oxygen are present in atmosphere but they do not react with each other under normal conditions, because: Nitrogen requires a catalyst Oxygen is very inactive Oxygen is found in less concentration Nitrogen is highly inactive gas 5. Which derivative of benzene shows maximum reactivity in electrophilic substitution reactions? Methyl benzene Nitrobenzene Benzoic acid Benzaldehyde 6. Which of the following reactions is used for the production of alcohols on industrial scale? Hydrogenation of alkenes Hydroxylation of alkenes Hydrohalogenation of alkenes Hydration of alkenes 7. The pH of 10-2 M aqueous solution of sodium hydroxide is 14 12 13 10 8. In the reaction sequence: Product D will be 2-Propanol Propanoic acid 1-Propanol Mixture of methanol and ethanol 9. What is the measure of activation energy in an endothermic reaction? The energy of activation of forward-backward reaction is same The energy of activation of forward reaction is less than that of backward reaction 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: Position isomers Structural isomers Metamers Cis-trans isomers 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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