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Mdcat-past-papers - UHS - Chemistry Quiz

Filters: Board: UHS | Subject: Chemistry |
341. Which one of the following compounds act as catalyst when alcohols react with carboxylic acids?



342. Select the reagent X from the following choices for this conversion:



343. Carboxylic acids can be reduced into corresponding alcohols. Which of the following reagent can be used for this purpose?



344. Mr. Khan mixes acetic acid with thionyl chloride. Which product is obtained?



345. When carboxylic acid is heated with alcohol in the presence of sulphuric acid, one of the following is formed:



346. Value of R gas constant in J mol^−1 K^−1.



347. Which of the following best explains why phenol reacts with aqueous NaOH, but alcohols do not?



348. In propene pi-bond is formed by sideway overlap of:



349. An enzyme used to decompose the lipids into fatty acids in our alimentary canal is:



350. Molecules having one lone pair and three bond pairs have geometrical shape :



351. Conversion of dihaloalkane into alkyne does not involve:



352. Majority of reactions taking place at ordinary temperatures with negative delta H are :



353. Which one of the following is a coinage metal :



354. Consider the given balanced chemical equation: 2H2 + O2 = 2H2O. If 4 g of H2 reacts with 32 g of O2 to produce 28 g of H2O, what is the percentage yield of the reaction? (Molar mass of H2 = 2 g/mol, O2 = 32 g/mol and H2O = 18 g/mol)



355. Amount of energy needed to weaken the existing bonds to an extent that can be broken through collision is called:



356. Oxidation numbers of X,Y,Z are +6, -2, & -1 respectively, possible molecular formula when atoms combine:



357. Which set of quantum numbers is not allowed for an electron.



358. 2A+B=3C+D which of the following does not express the reaction rate?



359. The order of ease of reduction of H+, Cu++, and Ag++:



360. Acetaldehyde undergoes oxidation to produce acetic acid, in this reaction oxidizing agent used is:



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