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?
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 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
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
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
Options
(a) chromium (b) diamond (c) tungsten (d) silver
Correct Answer:
tungsten
Explanation:
Tungsten (W) metal has hgihest melting point.
Variable valency in general, is exhibited by
Options
(a) transition elements (b) gaseous elements (c) non-metals (d) s-block elements
Correct Answer:
transition elements
Explanation:
Transition elements show variable valency due to presence of […]
Which of the following is never true for cathode rays?
Options
(a) They possess kinetic energy (b) They are electromagnetic waves (c) They produce heat (d) They produce mechanical pressure
Correct Answer:
They […]
The structure of XeOF₄ is
Options
(a) planar (b) tetrahedral (c) square pyramidal (d) pyramidal
Correct Answer:
square pyramidal
Explanation:
In XeOF₄, Xe is sp³d²-hybridised. Xe atom has one lone pair and 6 […]
The two electrons in K-subshell will differ in
Options
(a) principal quantum number (b) azimuthal quantum number (c) magnetic quantum number (d) spin quantum number
Correct Answer:
spin quantum number
Explanation:
The two […]
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