16
18
12
14
Correct answer is B
168X, m8X
16 * (90/100) + m * (10/100) = 16.2
1440 + 10m = 1620
10m = 180
m = 18
X
W
Z
Y
Correct answer is C
No explanation has been provided for this answer.
Millikan's contributions to the development of atomic theory is the determination of
charge on electron
positive rays
charge to mass ratio
cathode rays
Correct answer is A
No explanation has been provided for this answer.
An oxide XO2 has a vapour density of 32. What is the atomic mass of X?
32
20
14
12
Correct answer is A
Relative molecular mass of XO2 =2 × vapour density
Relative molecular mass → 32 * 2 = 64
Atomic mass of X:
X + [16 * 2] = 64
X = 64 - 32
=32
Cancerous growths are cured by exposure to
γ - rays
β - rays
α - rays
infrared rays
Correct answer is A
No explanation has been provided for this answer.