The sulphate of a metal M contains 9.87% of M. The sulphate is isomorphous with ZnSO4.7H2O. The atomic weight of M is
40.3
36.3
24.3
11.3
3 g of an oxide of a metal is converted to chloride completely and it yielded 5 g of chloride. The equivalent weight of the metal is:
3.325
33.25
12
20
5 mL of N HCl, 20 mL of N/2 H2SO4 and 30 mL of N/3 HNO3 are mixed together and volume made to one litre. The normality of resulting solution is:
0.45
0.025
0.9
0.05
The weight of 1 × 1022 molecules of CuSO4.5H2O is
41.59 g
415.9 g
4.159 g
None of these
What is the percentage of water of crystallisation in a sample of blue vitriol ?
34.07%
35.07%
36.07%
37.07%
If 0.5 moles of BaCl2 are mixed with 0.2 moles of Na3PO4, the maximum number of moles of Ba3(PO4)2 that can be formed is:
0.7
0.5
0.30
0.10
How much of NaOH is required to neutralise 1500 cm3 of 0.1 N HCl ? (Na = 23)
40 g
4 g
6 g
60 g
A metal oxide contains 53% metal and carbon dioxide contains 27% carbon. Assuming the law of reciprocal proportions, the percentage of metal in the metal carbide is
75
25
37
66
10dm3 of N2 gas and 10 dm3 of gas X at the same temperature contain the same number of molecules. The gas X is
CO
CO2
H2
NO
The number of water molecules present in a drop of water (volume 0.0018 mL) at room temperature is :
6.023 × 1019
1.084 × 1018
4.80 × 1017
6.023 × 1023
