Question

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

Solution

Correct option is

two moles of phosphine

Ca3P+ 6 H2O    → 3 Ca(OH)2 + 2 PH3

SIMILAR QUESTIONS

Q1

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

Q2

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

Q3

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 

Q4

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 

Q5

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 : 

Q6

The number of atoms in 4.25 g of NH3 is approximately

Q7

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 

Q8

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

Q9

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

Q10

 The percentage of nitrogen in urea is about