No. of questions - 33
Time - 15 min
1.
Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true then the weight of zinc required to produce 20 g of the crystals will be
2.
The per cent loss in weight after heating a pure sample of potassium chlorate (mol. wt. = 122.5) will be:
3.
The mass of nitrogen per gram hydrogen in the compound hydrazine is exactly one and half times the mass of nitrogen in the compound ammonia. The fact illustrates the
4.
A sample of copper sulphate pentahydrate contains 8.64 g of oxygen. How many gram of Cu is present in this sample? (Atomic mass of Cu = 63.6, S = 32.06, O = 16)
5.
Law of constant composition is same as the law of
6.
Of two oxides of iron, the first contained 22% and the second contained 30% of oxygen by weight. The ratio of weights of iron in the two oxides that combine with the same weight of oxygen, is
7.
A partially dried clay mineral contains 8% water. The original sample contained 12% water and 45% silica. The % of silica in the partially dried sample is nearly:
8.
The mass of 11.2 L of ammonia gas at STP is
9.
Which has maximum number of atoms?
10.
What is the weight of oxygen that is required for the complete combustion of 2.8 kg of ethylene?
11.
The net charge on ferrous ion is:
12.
74.4 g of a metallic chloride contains 35.5 g of chlorine. The equivalent weight of the metal is:
13.
Out of 1.0 g dioxygen, 1.0 g (atomic) oxygen and 1.0 g ozone, the maximum number of molecules are contained in
14.
Equivalent weight of an acid
15.
Which of the following is not a mixture?
