The volume of oxygen necessary for the complete combustion of 20 L of propane is :
40 L
60 L
80 L
100 L
0.005 M acid solution has 5 pH. The percentage ionisation of acid is :
0.8%
0.6%
0.4%
0.2%
D.
0.2%
We know,
[H+] = 10-pH = 10-5
α = = = 0.2 × 10-2
Percentage composition = 0.2 × 10-2 × 100 = 0.2 %
CH3COOH is weaker acid than H2SO4.It is due to:
more ionization
less ionization
covalent bond
electrovalent bond
A gaseous mixture contains 56 g of N2, 44 g of CO2 and 16 g of CH4. The total pressure of mixture is 720 mm of Hg. The partial pressure of methane is :
75 atm
160 atm
180 atm
215 atm
The solubility of Sb2S3 in water is 1.0 × 10-5 mol/L at 298K. What will be its solubility product?
108 × 10-25
1.0 × 10-25
144 × 10-25
126 × 10-24