Law of constant composition was proposed by
A. Lavoisier
Proust
Huckel
Rutherford
One litre hard water contains 12.00 mg Mg2+ . Milli equivalents of washing soda required to remove its hardness is
1
12.16
1 x 10 -3
12.16 x 10 -3
Number of moles of required to oxidise one mole of ferrous oxalate completely in acidic medium will be
0.6 mole
0.4 mole
7.5 moles
0.2 mole
Which law says when two or more gases react with one another, their volumes bear simple whole number ratio with one another and to the volume of products provided all volume are measured under identical conditions of temperature and pressure ?
Gay Lussac's Law of combining volumes
Law of constant composition
Law of multiple proportions
Law of reciprocal proportions
Which law says that during any physical or chemical change, the matter is neither created nor destroyed. However, it may change from one form to another?
Huckel's Law
Law of conservation of mass
Law of constant proportion
Law of electrolysis
Liquid benzene (C6H6) burns in oxygen according to the equationHow many litres of O2 at STP are needed to complete the combustion of 39 g of liquid benzene ?(Mol wt O2 = 32, C6H6 = 78)
74 L
11.2 L
22.4 L
84 L
The number of atoms in 4.25g of NH3 is approximately
The number of gram molecules of oxygen in molecules is
10 g molecules
5 g molecules
1 g molecules
0.5 g molecules
The molecular weight of O2 and SO2 are 32 and 64 respectively. At 15o C and 150 mmHg pressure, 1 L of O2 contains 'N' molecules. The number of molecules in 2 L of SO2 under the same conditions of temperature and pressure will be
N/2
N
2 N
4 N
