The Percentage Of Se In peroxidase anhydrous Enzyme Is 0.5% By Weight (atomic Weight = 78.4). Then Minimum Molecular Weight Of peroxidaseanhydrous Enzyme Is

Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (at wt. of Fe = 56) present in one molecule of haemoglobin is 

In the reaction, 4 NH₃ (g) + 5 O₂ (g) → 4 NO (g) + H₂O (l), when 1 mole of ammonia and 1 mole of O₂ are made to react to completion 

50mL 10 N H₂SO₄, 25mL 12 N HCl and 40 mL 5 N HNO₃ were mixed together and the volume of the mixture was made 1000mL by adding water. The normality of the resultant solution will be : 

The number of atoms in 4.25 g of NH₃ is approximately

A 100mL solution of 0.1 N HCl was titrated with 0.2 N NaOH solution. The titration was discontinued after adding 30mL of NaOH solution. The remaining titration was completed by adding 0.25 N KOH solution. The volume of KOH required for completing the titration is 

One mole of calcium phosphide on reaction with excess of water gives

Number of g of oxygen in 32.2 g Na₂SO₄. 10H₂O is

 The percentage of nitrogen in urea is about

How much of NaOH is required to neutralize 1500 cm³ of 0.1 N HCl? (Na = 23)

10 dm³ of N₂ gas and 10 dm³ of gas X at the same temperature contain the same number of molecules. The gas X is