Solved papers for NEET Chemistry NEET PYQ-Organic Chemistry Some Basic Principles

done NEET PYQ-Organic Chemistry Some Basic Principles Total Questions - 6

• question_answer1) Camphor is often used in molecular mass determination because:       [AIPMT (S) 2004]
  A)
  it is readily available
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  B)
  it has a very high cryoscopic constant
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  C)
  it is volatile
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  D)
  it is solvent for organic substances
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• question_answer2) In Duma’s method of estimation of nitrogen 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (Aqueous tension at \[300\text{ }K=15\text{ }mm\])  [AIPMT (S) 2011]
  A)
  16.45
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  B)
  17.45
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  C)
  14.45
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  D)
  15.45
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• question_answer3) The Lassaigne's extract is boiled with cone \[HN{{O}_{3}}\] while testing for halogens. By doing so it     [AIPMT (S) 2011]
  A)
  helps in the precipitation of AgCl
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  B)
  increases the solubility product of AgCl
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  C)
  increases the concentration of \[NO_{3}^{-}\] ions
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  D)
  decomposes \[N{{a}_{2}}S\] and NaCN, if formed
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• question_answer4)      In the Kjeldahl’s method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralised 10mL of 1 M \[{{H}_{2}}S{{O}_{4}}\]. The percentage of nitrogen in the soil is       [AIPMT 2014]
  A)
  37.33
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  B)
  45.33
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  C)
  35.33
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  D)
  43.33
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• question_answer5) In Duma’s method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm, the percentage of nitrogen in the compound is                               [NEET 2015 (C)]
  A)
  17. 36
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  B)
  18.20
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  C)
  16.76
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  D)
  15.76
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• question_answer6) Paper chromatography is an example of [NEET 2020]
  A)
  Partition chromatography
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  B)
  Thin layer chromatography
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  C)
  Column chromatography
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  D)
  Adsorption chromatography
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