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  1. A vessel contains a mixture of different types of gases.Which of the following
  2. The diazotization of two feebly basic aromatic amines is achieved by using
  3. Boron has two stable isotopes, ¹°B(19%) and ¹¹B(81%). Average atomic weight
  4. Which of the following is used as ”anasthesia”
  5. A solid compound XY has NaCl structure . If the radius of the cation is 100 pm,