2SO2 (g) + O2 (g) is an example for :
neutralisation reaction
homogeneous catalysis
heterogeneous catalysis
irreversible reaction
During the formation of a chemical bond :
electron-electron repulsion becomes more than the nucleus-electron attraction
energy of the system does not change
energy increases
energy decreases
D.
energy decreases
During the formation of a chemical bond energy decreases .
Which ofthe following is an intensive property ?
Temperature
Viscosity
Surface tension
All of these
Hydroxyl ion concentration of 10-2 M HCl is :
1 x 101 mol dm-3
1 x 10-12 mol dm-3
1 x 10-1 mol dm-3
1 x 10-14 mol dm-3
For a certain particle , it is found that uncertainty in velocity is reciprocal of uncertainty in position .This implies that :
mass of particle > unity
mass of particle = unity
mass of particle h
mass of particle h / 4
Which one of the following salts on being dissolved in water gives pH > 7 at 25°C ?
KCN
KNO3
NH4Cl
NH4CN
The volume of 10N and 4N HCl required to make 1 L of 7N HCl are :
0.50 L of 10N HCl and 0.50 L of 4N HCl
0.60 L of 10N HCl and 0.40 L of 4N HCl
0.80 L of 10N HCl and 0.20 L of 4N HCl
0.75 L of 10N HCl and 0.25 L of 4N HCl