Class XII

AgCN reacts with haloalkanes to form isocyanide. Haloalkanes react with KCN to form alkyl cyanides as main product
  1. ------- -KCN provides cyanide ions in solution.------------------------------------------------------------------------------- KCN provides cyanide ions in solution------------------------------------------------------------------------- KCN p
  2. AgCN provides cyanide ions in solution.
  3. KCN is mainly covalent in nature
  4. AgCN is mainly ionic in nature
Triiodomethane (Iodoform) is
  1. antiseptic drug
  2. Refrigerant
  3. Pesticide
  4. degreasing agent
Boron is unable to form BF6− ion
  1. the atomic mass of Fluorine is large
  2. None of the above
  3. Due to absence of d orbital
  4. the atomic mass of Fluorine is small
Grignard reagent should be prepared under anhydrous conditions because
  1. They are highly reactive
  2. the carbon – Mg bond is covalent but polar
  3. All the below
  4. the Mg – halogen bond is ionic
Which one of the following is employed as antityphoid drug?
  1. Omeprazole
  2. Chloramphenicol
  3. Diphenyl hydramine
  4. Chloroquine
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