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Mdcat-past-papers - UHS Quiz

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1481. The decomposition of phosphorus pentachloride in the presence of moisture takes place by the following mechanism: PCL5+H2O→POCL3+2HCL (slow step) POCL3+3H2O→H3PO4+3HCL (Fast step) Result = PCL5 +4H2O→ H3PO4+5HCl the rate equation for this reaction will be:



1482. In the reaction sequence CH₃−CH₂−CH₂−Br + Alc KOH → C → D, Product D will be:



1483. Which balanced chemical equation shows the formation of ethyl chloride using thionyl chloride?



1484. The increasing stability order of the following compounds (1) CH₃CH₂CH₂⁺ (2) (CH₃)₃C⁺ (3) CH₃CH₂−CH⁺−CH₃ are:



1485. When 2-bromopropane reacts with sodium ethoxide, the major product is/are:



1486. Identify the correct statement related to substitution and elimination of alkyl halides:



1487. Alkyl halides involving -C-X bond breakage and -C-Nu bond formation simultaneously would follow which one of the following mechanisms:



1488. An alcohol is converted to an aldehyde with same number of carbon atoms as that of alcohol in the presence of K₂Cr₂O₇/H₂SO₄, the alcohol is:



1489. Which enzyme is involved in fermentation of glucose:



1490. The dehydration of ethyl alcohol with concentrated H₂SO₄ at 140°C gives:



1491. Ethanol can be converted into ethanoic acid by:



1492. Alcohol in which carbon atom bonded to OH group is further attached with three alkyl group is:



1493. Select one which is alcohol:



1494. Which one of the following compounds is known as tertiary alcohol?



1495. Which of the following compounds will give a secondary alcohol after reaction with NaBH₄?



1496. Which of the following reactions is used for the production of alcohols on industrial scale?



1497. When ethanol is warmed with ethanoic acid in the presence of a strong acid catalyst, an ester ethanoate is formed. During this reaction:



1498. Consider the following reactions: C₂H₅OH + PCl₅ → What products may be formed?



1499. Primary, Secondary, and Tertiary alcohols can be identified and distinguished by:



1500. Which one of the following alcohols is indicated by formation of yellow crystals in the iodoform test?



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