Answer:
D. As white light passes through a prism , it bends and separates into different colors
Explanation:
When light enters a prism, it experiences a phenomenon called 'refraction'.
Refraction occurs when light crosses the interface between two mediums with different optical density; when this happens, the light bends and also changes speed.
The angle at which the ray of light is refracted into the second medium depends on the optical density of the two mediums, but also on the wavelength of the light.
In particular, longer wavelengths (red color) are refracted the least, while shorter wavelengths (violet color) are refracted the most.
As a result, when white light (consisting of all the colors of visible light) enters into a prism, they different wavelengths are separated: therefore, white light separates into different colors.
So, the correct answer is
D. As white light passes through a prism , it bends and separates into different colors
Answer:
The binding energy present in the atomic nucleus that holds the protons and the neutrons together and its magnitude is one million times stronger than the electron binding energy in small atoms
Explanation:
The minimum required force to dismember an atomic nucleus into its constituent components, of protons and nucleus (collectively called nucleons) in known as the nuclear binding energy.
Energy is required in separating the nucleons hence the binding energy of a nucleus is always positive
According to Einstein's Energy and light relation E = mc², when a nucleus is formed from the number of free protons and neutrons, the sum of their individual masses is more than the mass of the formed atomic nucleus. The mass deficit of the neutron, also known as the 'missing mass' or mass defect indicates the amount of energy released in forming of the nucleus which therefore has different characteristics from its constituents as mentioned above
The amount of mass that is equivalent to the binding energy of the nucleus as shown in the Einstein's equation (E=mc²) is represented by the missing mass or mass defect of the formed nucleus or the difference in mass between the nuclear mass and that of the sum of the individual masses of its constituent protons and neutrons
Reaction of methyl amine with HCl (H+) is:
CH3NH2 + H⁺ ↔ CH3NH3⁺
At equivalence point:
moles of CH3NH2 = moles of HCl
moles of CH3NH2 = 0.350 * 0.125 = 0.0438 moles = moles of HCl
Volume of HCl = 0.0438 / 0.250 = 0.1752 L
Therefore, total volume at eq point = 0.350 + 0.1752 = 0.5252 L
Now, at equivalence point there is 0.0438 moles of CH3NH3+. The new equilibrium is :-
CH3NH3+ ↔ CH3NH2 + H+
where the concentration of CH3NH3+ = 0.0438/0.5252 = 0.083 M
Ka = [CH3NH2][H+]/[CH3NH3+]
Kw/Kb = x²/0.083-x
10⁻¹⁴/4.4*10⁻⁴ = x²/0.083-x
therefore x = [H+] = 1.37*10⁻⁶M
pH = -log[H+] = -log[1.37*10⁻⁶] = 5.86
