Solved papers for NEET Chemistry NEET PYQ-Analytical Chemistry

done NEET PYQ-Analytical Chemistry Total Questions - 5

• question_answer1) When a substance A reacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. ‘A’ imparts a deep golden yellow colour to a smokeless flame of bunsen burner A, B, C and D respectively are:                        [AIPMT 1998]
  A)
  \[Na,\,{{H}_{2}},\,NaOH,\,Zn\]
  done clear
  B)
  \[K,\,{{H}_{2}},\,KOH,\,Al\]      
  done clear
  C)
  \[Ca{{H}_{2}},\,Ca{{(OH)}_{2}},\,Sn\]
  done clear
  D)
  \[Ca{{C}_{2}},\,{{C}_{2}}{{H}_{2}},\,Ca{{(OH)}_{2}},\,Fe\]
  done clear
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• question_answer2) A one litre flask is full of brown bromine vapour. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some: [AIPMT 1998]
  A)
  pieces of marble 
  done clear
  B)
  animal charcoal powder
  done clear
  C)
  carbon tetrachloride        
  done clear
  D)
  carbon disulphide
  done clear
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• question_answer3) A solid compound 'X' on heating gives \[C{{O}_{2}}\]gas and a residue. The residue mixed with water forms on passing an excess of \[C{{O}_{2}}\]through ‘Y’ in water, a clear solution, 'Z' is obtained. On boiling 'Z' compound 'X' is reformed. The compound 'X' is:                              [AIPMT (S) 2004]
  A)
  \[\text{Ca}{{\left( \text{HC}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}\]
  done clear
  B)
  \[\text{CaC}{{\text{O}}_{\text{3}}}\]
  done clear
  C)
  \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\]
  done clear
  D)
  \[{{\text{K}}_{2}}C{{O}_{3}}\]
  done clear
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• question_answer4) The compound A on heating gives a colourless gas and a residue that is dissolved in water to obtain B. Excess of CO2 is bubbled through aqueous solution of B, C is formed which is recovered in the solid form. Solid C on gentle heating gives back A. The compound A is [AIPMT (M) 2010]
  A)
  \[CaC{{O}_{3}}\]
  done clear
  B)
  \[N{{a}_{2}}C{{O}_{3}}\]
  done clear
  C)
  \[{{K}_{2}}C{{O}_{3}}\]
  done clear
  D)
  \[CaS{{O}_{4}}\cdot 2{{H}_{2}}O\]
  done clear
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• question_answer5) Roasting of sulphides gives the gas X as a by-product. This is a colour less gas with '.choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid has never been insolated. The gas X is                                     [NEET 2013]
  A)
  \[{{\text{H}}_{\text{2}}}\text{S}\]
  done clear
  B)
  \[\text{S}{{\text{O}}_{\text{2}}}\]       
  done clear
  C)
  \[\text{C}{{\text{O}}_{\text{2}}}\]
  done clear
  D)
  \[\text{S}{{\text{O}}_{3}}\]
  done clear
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