JEE Main & Advanced Chemistry Organic Chemistry: Some Basic Principles & Techniques / कार्बनिक रसायन : कुछ मूलभूत सिद्धांत एवं तकन Question Bank

done Critical Thinking Total Questions - 16

• question_answer1)
  \[116mg\] of a compound on vaporization in a Victor Meyer?s apparatus displaces \[44.8\,ml\] of air measured at S.T.P. The molecular weight of the compounds is [Kerala PMT 2004]
  A)
  116 done clear
  B)
  232 done clear
  C)
  58 done clear
  D)
  44.8 done clear
  E)
  46.4 done clear
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• question_answer2)
  An organic compound contains 49.3% carbon 6.84% hydrogen and its vapour density is 73. Molecular formula of the compound is [MP PET 2000; Kerala PMT 2004; Pb. CET 2004]
  A)
  \[{{C}_{3}}{{H}_{5}}{{O}_{2}}\] done clear
  B)
  \[{{C}_{6}}{{H}_{10}}{{O}_{4}}\] done clear
  C)
  \[{{C}_{3}}{{H}_{10}}{{O}_{2}}\] done clear
  D)
  \[{{C}_{4}}{{H}_{10}}{{O}_{2}}\] done clear
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• question_answer3)
  If 0.228 g of silver salt of dibasic acid gave a residue of 0.162g of silver on ignition then molecular weight of the acid is [AIIMS 2000]
  A)
  70 done clear
  B)
  80 done clear
  C)
  90 done clear
  D)
  100 done clear
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• question_answer4)
  \[0.0833\,mol\] of carbohydrate of empirical formula \[C{{H}_{2}}O\] contain \[1g\] of hydrogen. The molecular formula of the carbohydrate is [DCE 2003; BVP 2004]
  A)
  \[{{C}_{5}}{{H}_{10}}{{O}_{5}}\] done clear
  B)
  \[{{C}_{3}}{{H}_{4}}{{O}_{3}}\] done clear
  C)
  \[{{C}_{12}}{{H}_{22}}{{O}_{11}}\] done clear
  D)
  \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] done clear
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• question_answer5)
  A gas mixture contains 50% helium and 50% methane by volume. What is the percent by weight of methane in the mixture [Kerala PMT 2004]
  A)
  19.97% done clear
  B)
  20.05% done clear
  C)
  50% done clear
  D)
  75% done clear
  E)
  80.03% done clear
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• question_answer6)
  0.5 g of hydrocarbon gave 0.9 g water on combustion. The percentage of carbon in hydrocarbon is
  A)
  75.8 done clear
  B)
  80.0 done clear
  C)
  56.6 done clear
  D)
  28.6 done clear
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• question_answer7)
  Lassaigne's test for the detection of nitrogen fails in [CBSE PMT 1994]
  A)
  \[N{{H}_{2}}CONHN{{H}_{2}}.HCl\] done clear
  B)
  \[N{{H}_{2}}N{{H}_{2}}.HCl\] done clear
  C)
  \[N{{H}_{2}}CON{{H}_{2}}\] done clear
  D)
  \[{{C}_{6}}{{H}_{5}}NHN{{H}_{2}}.HCl\] done clear
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• question_answer8)
  Camphor is often used in molecular mass determination because [CBSE PMT 2004]
  A)
  It is volatile done clear
  B)
  It is solvent for organic substances done clear
  C)
  It is readily available done clear
  D)
  It has a very high cryoscopic constant done clear
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• question_answer9)
  In Kjeldahl's method, the nitrogen present in the organic compound is quantitatively converted into [DCE 2003]
  A)
  Gaseous ammonia done clear
  B)
  Ammonium sulphate done clear
  C)
  Ammonium phosphate done clear
  D)
  Ammonia done clear
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• question_answer10)
  How many H-atoms are present in 0.046 g of ethanol [DCE 2003]
  A)
  \[6\times {{10}^{20}}\] done clear
  B)
  \[1.2\times {{10}^{21}}\] done clear
  C)
  \[3\times {{10}^{21}}\] done clear
  D)
  \[3.6\times {{10}^{21}}\] done clear
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• question_answer11)
  A hydrocarbon contains 10.5 gm carbon and 1gm hydrogen. Its 2.4 gm has 1 litre volume at 1 atm and \[{{127}^{o}}C\], hydrocarbon is [UPSEAT 2003]
  A)
  \[{{C}_{6}}{{H}_{7}}\] done clear
  B)
  \[{{C}_{6}}{{H}_{8}}\] done clear
  C)
  \[{{C}_{5}}{{H}_{6}}\] done clear
  D)
  None of these done clear
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• question_answer12)
  IUPAC name of the compound \[C{{H}_{3}}-C{{H}_{2}}-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-\underset{\underset{\underset{\overset{\underset{\begin{matrix}    C{{H}_{3}} & C{{H}_{3}}\,\,\,  \\ \end{matrix}}{\mathop{\hat{\ }}}\,}{\mathop{{}}}\,}{\mathop{CH\,\,\,\,\,\,\,\,}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{CH\,\,\,-\,\,C{{H}_{2}}-C{{H}_{2}}C{{H}_{3}}}}\,\] [Orissa JEE 2003]
  A)
  4-isopropyl 1-6-methyl octane done clear
  B)
  3- methyl-5-(1?-methylethyl) octane done clear
  C)
  3-methyl-5-isopropyl octane done clear
  D)
  6-methyl-4-(1?methylethyl) octane done clear
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• question_answer13)
  What is the correct IUPAC name of             [MP PMT 2003]
  A)
  4-methoxy-2-nitrobenzaldehyde done clear
  B)
  4-formyl-3-nitro anisole done clear
  C)
  4-methoxy-6-nitrobenzaldehyde done clear
  D)
  2-formyl-5-methoxy nitrobenzene done clear
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• question_answer14)
  The IUPAC name of  the compound is [AIEEE 2004]
  A)
  3, 3- dimethyl-1-cyclohexanol done clear
  B)
  1, 1-dimethyl-3-hydroxy cyclohexane done clear
  C)
  3, 3-dimethyl-1-hydroxy cyclohexane done clear
  D)
  1, 1-dimethyl-3-cyclohexanol done clear
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• question_answer15)
  Name of the compound given below is [CBSE PMT 2003]
  A)
  5-ethyl-6-methyloctane done clear
  B)
  4-ethyl-3-methyloctane done clear
  C)
  3-methyl-4-ethyloctane done clear
  D)
  2, 3-diethylheptane done clear
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• question_answer16)
  The compound  is known by which of the following names [MP PET 1997]
  A)
  Bicyclo-[2, 2, 2] octane done clear
  B)
  Bicyclo-[2, 2, 1] octane done clear
  C)
  Bicyclo-[1, 2, 1] octane done clear
  D)
  Bicyclo-[1, 1, 1] octane done clear
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