One Mole Of Calcium phosphide on Reaction With Excess Of Water Gives

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


Correct option is

two moles of phosphine

Ca3P+ 6 H2O    → 3 Ca(OH)2 + 2 PH3



The molecular weight of O2 and SO2 are 32 and 64 respectively. If onelitre of O2 at 15oC and 750 mm contains N molecules, the number of molecules in two litres of SO2 under the same conditions of temperature and pressure will be


Five grams of each of the following gases at 87oC and 750 mm pressure are taken. Which of them will have the least volume?


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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 


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