Pauling’s electro negativity values for elements are useful in predicting
Options
(a) Polarity of the molecules (b) Position in the E.M.F. series (c) Coordination numbers (d) Dipole moments
Correct Answer:
Polarity of the […]
What is the packet of energy called?
Options
(a) Electron (b) Photon (c) Positron (d) Proton
Correct Answer:
photon
Explanation:
According to Planck’s quantum theory of radiation, radient energy is emitted or absorbed […]
The shape of IF₇ molecule is
Options
(a) octahedral (b) trigonal bipyramidal (c) tetrahedral (d) pentagonal bipyramidal
Correct Answer:
pentagonal bipyramidal
Explanation:
Number of hybrid orbitals, H = 1/2 [V + M + […]
Which of the following species contains three bond pairs and one lone pair around the central atom?
Options
(a) H₂O (b) BF₃ (c) NH₂⁻ (d) PCl₃
Correct Answer:
PCl₃
Explanation:
PCl₃ is central […]
In a given atom no two electrons can have the same values for all the four quantum numbers.This is called
Options
(a) Hund’s Rule (b) Aufbau principle (c) Uncertainty principle (d) Pauli’s Exclusion […]
The number of spherical nodes in 3p orbitals are
Options
(a) one (b) three (c) none (d) two
Correct Answer:
one
Explanation:
No. of radial nodes in 3p-orbital= (n – l – 1) […]
The pair of species with the same bond order is:
Options
(a) O₂²⁻, B₂ (b) O₂⁺, NO⁺ (c) NO, CO (d) N₂, O₂
Correct Answer:
O₂²⁻, B₂
Explanation:
No explanation available. Be the […]
Which of the following is paramagnetic?
Options
(a) O₂⁻ (b) CN⁻ (c) NO⁺ (d) CO
Correct Answer:
O₂⁻
Explanation:
O₂⁻ (17) = σ1s², σ*1s², σ2s², σ*2s², σ2pₖ², π2pᵢ² = π2pⱼ², π*2pᵢ² = π*2pⱼ¹
Bond order of 1.5 is shown by:
Options
(a) O₂⁺ (b) O₂⁻ (c) O₂²⁻ (d) O₂⁻
Correct Answer:
O₂⁻
Explanation:
No explanation available. Be the first to write the explanation for this question […]
Which of the following has the minimum bond length ?
Options
(a) O₂⁺ (b) O₂⁻ (c) O₂²⁻ (d) O₂
Correct Answer:
O₂⁺
Explanation:
Bond order is defined as half of the difference between […]
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