No. of questions - 33
Time - 15 min
1.
The per cent loss in weight after heating a pure sample of potassium chlorate (mol. wt. = 122.5) will be:
2.
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
3.
74.4 g of a metallic chloride contains 35.5 g of chlorine. The equivalent weight of the metal is:
4.
Which has maximum number of atoms?
5.
Out of 1.0 g dioxygen, 1.0 g (atomic) oxygen and 1.0 g ozone, the maximum number of molecules are contained in
6.
The mass of 11.2 L of ammonia gas at STP is
7.
The net charge on ferrous ion is:
8.
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:
9.
Equivalent weight of an acid
10.
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)
11.
What is the weight of oxygen that is required for the complete combustion of 2.8 kg of ethylene?
12.
Which of the following is not a mixture?
13.
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
14.
Law of constant composition is same as the law of
15.
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
