Atomic Mass Unit
One twelveth of the mass of an atom of carbon-12. It is equal to 1.66 x 10⁻²⁷ kg
Chemistry
Atomic Mass
Average relative mass of an atom of element compared to mass of carbon -12 taken as 12 a.m.u
If an electron has spin quantum number of +1/2 and a magnetic quantum number
If an electron has spin quantum number of +1/2 and a magnetic quantum number of -1, it cannot be represented in an
Options
(a) s-orbital (b) p-orbital (c) d-orbital (d) f-orbital
Correct Answer: […]
In the formation of N₂⁺from N₂, the electron is lost from
In the formation of N₂⁺from N₂, the electron is lost from
Options
(a) σ orbital (b) π orbital (c) σ * orbital (d) π * orbital
Correct Answer:
σ orbital
Explanation:
In the […]
During change of O₂ to O₂⁻ ion, the electron adds on which one of the following
During change of O₂ to O₂⁻ ion, the electron adds on which one of the following orbitals?
Options
(a) π* orbital (b) π orbital (c) σ* orbital (d) σ orbital
Correct Answer:
π* […]
In a homonuclear molecule, which of the following sets of orbitals is degenerate?
In a homonuclear molecule, which of the following sets of orbitals is degenerate?
Options
(a) σ 1s and σ 2s (b) π 2px and π 2py (c) π 2px and σ 2pz (d) […]
Which one of the following explains light both as stream of particle and as wave
Which one of the following explains light both as stream of particle and as wave motion?
Options
(a) Diffraction (b) Interference (c) λ=h/p (d) Photoelectric effect
Correct Answer:
λ=h/p
Explanation:
λ= h/p = […]
The forces present in the crystals of naphthalene are
The forces present in the crystals of naphthalene are
Options
(a) van der Waal’s forces (b) hydrogen bonding (c) electrostatic forces (d) None of these
Correct Answer:
van der Waal’s forces
Explanation:
Solid […]
In hydrogen spectrum, the different line of Lyman series are present in
In hydrogen spectrum, the different line of Lyman series are present in
Options
(a) UV field (b) IR field (c) visible field (d) for IR field
Correct Answer:
UV field
Explanation:
According to […]
The metal having the highest melting point is
The metal having the highest melting point is
Options
(a) chromium (b) diamond (c) tungsten (d) silver
Correct Answer:
tungsten
Explanation:
Tungsten (W) metal has hgihest melting point.