3.
In a compound C, H, N atoms are present in 9 : 1 : 3.5 by weight. Molecular weight of compound is 108, its molecular formula is:
4.
Which has maximum number of atoms?
5.
Density of a 2.05 M solution of acetic acid in water is 1.02g / mL. The molality of the solution is:
6.
Two solutions of a substance (non-electrolyte) are mixed in the following manner. 480 mL of 1.5 M of 1 solution with 520 mL of 1.2 M of II solution. The molarity of final solution is:
7.
Two elements X (atomic weight = 75) and Y (atomic weight = 16) combine to give a compound having 75.8% of X. The formula of the compound is:
9.
If 1/6 in place of 1/12 mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:
10.
How many moles of electrons weigh one kilogram?
11.
Which of the followings changes with increase in temperature?
14.
Read the question given below
17.
The least number of molecules are contained in :
19.
The amount of oxalic acid (hydrated) required to prepare 500 mL of its 0.1 N solution is:
20.
A solution of HC1 containing 0.659 g / mL and another solution of acetic acid containing 0.04509 g/ml., then:
21.
Which has the maximum number of atoms?
26.
The number of atoms in 558.5 g of Fe (at.wt. 55.85) is:
28.
Read the question given below
30.
2 mole of ethyl alcohol are present with 6 mole of water. The mole fraction of alcohol is:
