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          All posts related to Science

          Raghavendra Joshi
          Shared from BITSAT Mock - 7 on Jun 29, 2021 11:10 AM

          Consider the following reaction.



          'A' and 'B' are

           
          Please type your answer before submitting.
          Raghavendra Joshi

          How can double bond be more stable than ring? mustn't option b be correct?

          Sherbournisaacsps
          Shared from Living World on Jun 09, 2021 5:13 PM

          Which taxon out of the following aggregates to constitute a division in plants?

           
          Class
          Order
          Family
          Phylum
          #
          Please type your answer before submitting.
          Sherbournisaacsps

          I selected the right answer but why has it given wrong for me

          Shreya Singhal
          Shared from BITSAT Mock - 6 on Sep 20, 2020 12:03 AM

          In the conversion of limestone to lime,

          CaCO3 (s) CaO (s) + CO2 (g),

          the values of H0 and S0 are +179.1kJ mol-1 and 160.2 J/K, respectively, at 298 K and 1 bar. Assuming that H0 and S0 do not change with temperature, the temperature above which conversion of limestone to lime will be spontaneous is

           
          1008 K
          1200 K
          845 K
          1118 K
          Please type your answer before submitting.
          Shreya Singhal

          Stupid answers

          Gaurav Singh
          Shared from Paper-1 (2007) IIT-JEE on Sep 19, 2020 6:55 PM

          Directions: The following question is based on the paragraph given below.


          Chemical reactions involve interaction of atoms and molecules. A large number of atoms / molecules (approximately 6.023 ×1023) are present in a few grams of any chemical compound varying with their atomic /molecular masses. To handle such large numbers conveniently, the mole concept was introduced.
          This concept has implications in diverse areas such as analytical chemistry, biochemistry, electrochemistry and radiochemistry. The following example illustrates a typical case, involving chemical/electrochemical reaction, which requires a clear understanding of the mole concept. A 4.0 molar aqueous solution NaCl is prepared and 500 mL of this solution is electrolysed. This leads to the evolution of chlorine gas at one of the electrodes (atomic mass : Na = 23, Hg = 200;1 Faraday = 96500 coulombs).


          The total number of moles of chlorine gas evolved is

           
          0.5
          1.0
          2.0
          3.0
          Please type your answer before submitting.
          Gaurav Singh

          Question is having wrong value of NaCl concentration. In question it is given [NaCl]=4.0M while in solution it is given, [NaCl]=0.4M

          Chetan Vishnu
          Shared from BITSAT Mock - 6 on Sep 16, 2020 8:00 PM

          Which of the following compounds is named correctly?

           
          Please type your answer before submitting.
          Chetan Vishnu

          IF FUNCTIONAL GRP IS IN RING ,IT WILL HAVE MORE PRIORITY SO KETONE WILL HAVE MORE PRIORITY THAN CARBOXYLIC ACID