How Much Of NaOH is Required To Neutralize 1500 Cm3 of 0.1 N HCl? (Na = 23)

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 Se in peroxidase anhydrous enzyme is 0.5% by weight (atomic weight = 78.4). Then minimum molecular weight of peroxidaseanhydrous enzyme is

 The percentage of nitrogen in urea is about

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

The volume of water to be added to 100 cm³ of 0.5 N H₂SO₄ to get decinormal concentration is

250mL of a sodium carbonate solution contains 2.65 grams of Na₂CO₃. If 10mL of this solution is diluted to one litre, what is the concentration of the resultant solution?

(mol. wt. of Na₂CO₃= 106)