Chemistry - Purification And Characteristics of Organic Compunds

Question - 1

The elements of nitrogen and ulphur are present in an organic  compound.which of the sodium compounds(is/are)present in the sodium extract on fusing it with sodium?

  • A thicocyante
  • B cyanide and sulphide
  • C sulphite and cyanide
  • D nitrate and cyanide

Question - 2

The volume of co2 evoled on complete combustion of  1 mole of ethylene in excess oxygen in litres is

  • A 22.4
  • B 44.8
  • C 2.24
  • D NONE OF THESE

Question - 3

on complete combustion of 1 mole of C3H with excess of oxygen the water formed in moles is

  • A 2
  • B 3
  • C 4
  • D NONE OF THESE

Question - 4

An organic compound is found to contain C=39.9%,H=6.7%,O=53.4%. Its empirical formula is

  • A CHO
  • B CHO2
  • C CH2O2
  • D CH2O

Question - 5

An organic compound contains 60% carbon,13.3% hydrogen and rest oxygen.The emprical formula of the compound is

  • A C3H8O
  • B C4H7O2
  • C C2H6O
  • D C2H5O2

Question - 6

In  Which of the following compounds nitrogen cannot be tested by lassaigne's test

  • A C6H8O
  • B CH3CONH2
  • C NH2CONH2
  • D CH3NO2

Question - 7

Which of the following is blood red compound in quantitative estimation of nitrogen and sulphur together?

  • A Fe4[Fe(CN)6]3
  • B Fe(SCN)3
  • C FeSCN
  • D NA2S,NACN

Question - 8

In  Which of the following compounds nitrogen cannot be tested by lassaigne's test

  • A C6H8O
  • B CH3CONH2
  • C NH2CONH2
  • D CH3NO2

Question - 9

A mixture of water and alcohol can be seperated by 

  • A eveporation
  • B decantation
  • C titration
  • D fractional distillation

Question - 10

Which of the following is blood red compound in quantitative estimation of nitrogen and sulphur together?

  • A Fe4[Fe(CN)6]3
  • B Fe(SCN)3
  • C FeSCN
  • D NA2S,NACN
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