Indian Institute of Technology Mumbai (IIT-M) 2006 Entrance Exams IIT Entrance Exams IIT Chemistry - Question Paper

Then molar ratio of NaHCO3 to Na2CO3 is

(1) 1/2 (2) 2/3



(3) 3/4 (4) 1/3





33 when 400 g of a 20% solution by weight was cooled

50 g of solute precipitated the percentage

Concentration of remaining solution?



(1) 8.57% (2) 15%



(3) 12.25% (4) 9.5%



34 12.53 ml of 0.051 M SeO2 reacted with 25.52 ml of

0.1 M CrSO4 solution In the reaction Cr2+ was

Oxidised to Cr3+The Oxidation state at which

Selenium was converted is

(1) three (2) +2



(3) one (4) 0





35 the quantity of 3M HNO3 needed to Oxidised eight g

Fe2+ is

(HNO3 + Fe2+ -----> Fe3+ + NO + H2O)



(1) 8ml (2) 16ml



(3) 32ml (4) 64ml



36 the stoichiometric coefficient of S in the subsequent

Reaction

H2S + HNO3 -----> NO + S+ H2O



(1) one (2) 2



(3) three (4) 4



37 0.92 gm of Ag2CO3 heated strongly After

Heating the amount of residue is



(1) 0.36 gm (2) 0.39 gm



(3) 0.77 gm (4) 0.72 gm





38 200 ml of 0.01 M KMnO4 Oxidise 20 ml of

H2O2 sample in acidic medium the quantity

Earning:   Approval pending.