A given volume of methane diffuses in 20s. How long will ...
A given volume of methane diffuses in 20s. How long will it take the same volume of sulphur (IV) oxide to diffuse under the same conditions?
[C = 12, H = 1, S = 32, O = 16
5s
20s
40s
60s
Correct answer is C
Relative molecular mass of CH4 = 12 * 1 + 4 = 16
Relative molecular mass of SO2 = 32 + 10 *2 = 64
tSO2/tCH4 = √MSO2/MCH4
t/20 = √64/16 = √4
t/20 = 2
∴ t = 20 * 2 = 40sec
Which of the following will have its mass increased when heated in air? ...
What does X atand for in the following expression? X = Log(10)(H+)...
The following are uses of radioactive isotopes except for...
What is the chemical symbol for Selenium? ...
Arrange the following elements in order of increasing electron affinity: Br2CI2 I 2 F 2...
Which quantum number divides shells into orbitals? ...