JEXPO 2013 Solved paper Chemistry
JEXPO 2013 Solved paper Chemistry 51.CuSO 4 5H 2 O---T1----CuSO 4 ,H 2 ----T2---CuSO 4 In this process T1 ad T2 are respectively as Ans.: (C) 125°C and 200°C 52. Excess ammonia on reaction with Cl 2 gas forms Ans.: (C) NCl 3 53. Nitrolim is a mixture of Ans.: (B) CaCN 2 and C 54. For HNO 3 identification, we run 'ring test', the composition of which is Ans.: (C) Fe(NO)(H 2 O) 5 SO 4 55. Identification of original diamond is done by Ans.: (B) x-ray 56. Components of producer gas are Ans.: (C) CO+H 2 57. Baking powder is a mixture of Ans.: (C) Sodium bicarbonate and potasium hydrogen tartarate 58. Main components of german silver are Ans.: (D) Cu-Zn-Ni 59. The formula of Nesslar's regent is Ans.: (C) K 2 HgI 4 60. A small amount of powder is added into dil,. H2SO4 acid solution and the evolved gas turbids lime water. Powder and gas are Ans.: (D) ferrous sulphide and hydrogen sulphide 61. When an aqueous solution of Ba(NO 3 ) 2 is added to a ...