Chemistry MCQs Online Quiz Test 36

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Q.1: How many electrons are there in benzene to form delocalized electron cloud——–?

  1. 3
  2. 4
  3. 6
  4. 8


Q.2: When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound ?

  1. Bromine
  2. Chlorine
  3. Fluorine
  4. Iodine


Q.3: Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in——–?

  1. The presence of Oxygen
  2. The presence of Hydrogen
  3. The absence of Oxygen
  4. The presence of excessive Oxygen


Q.4: How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum ?

  1. Two
  2. Three
  3. Four
  4. Six


Q.5: The resonance energy of benzene is———?

  1. 150.5 kJ/mol
  2. 250.5 kJ/mol
  3. 150.5 Cal/mol
  4. 250.5 Cal/mol


Q.6: What catalyst is employed when benzene is prepared from acetylene at 70°C?

  1. Cr2O3 + A2O3 + SiO2
  2. Raney nickel
  3. Organo-nickel
  4. Ni 250 – 300°C


Q.7: Which one of the following methods will not give benzene ?

  1. Heating sod. Salt of Benzoic acid with soda lime
  2. Distilling phenol with Zn dust
  3. Chlorobenzene with NaOH at 360°C And 150atm.
  4. Hydrolysis of benzene sulphonic acid with super heated steam


Q.8: The magnetic quantum number (QN) has its values determined directly by the value of——–?

  1. Principal (QN)
  2. Azimuthal (QN)
  3. Spin (QN)
  4. Both A And B


Q.9: Nucleic acids were first demonstrated in———?

  1. Pus cells
  2. Sperm heads
  3. 1872
  4. all of the above


Q.10: The mechanism by which the genetic information can be duplicated is called———?

  1. Duplication
  2. Transcription
  3. Replication
  4. Mutation