1.Haemoglobin contains 0.33% of iron by mass. The molecular mass of haemoglobin is approximately 67200. The number of iron atoms [at. mass Fe = 56] present is one molecule of haemoglobin is

2.An organic compound having carbon, hydrogen and sulphur contains 4% of sulphur. The minimum molecular mass of the compound is

3.Certain organic compound contains 10% of sulphur is it. Which of the following represent the minimum molecular mass of the compound

4.The chloroplatinate of an organic base contains 39% of Pt. The equivalent mass of the base is

5.The molecular mass of an organic compound which contains only one nitrogen atom can be