In the periodic table, the element with atomic number 16 will be placed in the group
Options
(a) third (b) fourth (c) fifth (d) sixth
Correct Answer:
sixth
Explanation:
₁₆X ≡ 1s²2s²2p⁶3s²3s⁴; there […]
The electronegativity of the following elements increases in the order
Options
(a) C, N, Si ,P (b) N, Si, C, P (c) Si, P, C, N (d) P, Si, N, C
Correct Answer: […]
In which one of the following molecules the central atom does not have sp³ hybridization?
Options
(a) NH₄⁺ (b) CH₄ (c) SF₄ (d) BF₄⁻
Correct Answer:
SF₄
Explanation:
NH₄⁺, CH₄, BF₄⁻ : sp³ […]
The screening effect of d-electrons is
Options
(a) equal to that of p-electrons (b) more than that of p-electrons (c) same as f-electrons (d) less than p-electrons
Correct Answer:
same as f-electrons
Explanation: […]
Electric configuration of chalcogens in their outermost orbit is
Options
(a) s²p³ (b) s²p⁴ (c) s²p⁵ (d) s²p⁶
Correct Answer:
s²p⁴
Explanation:
Chalcogens are oxygen family.
There is no S – S bond in
Options
(a) S₂O₄²⁻ (b) S₂O₅²⁻ (c) S₂O₃²⁻ (d) S₂O₇²⁻
Correct Answer:
S₂O₇²⁻
Explanation:
No explanation available. Be the first to write the explanation for this […]
The correct order of the decreasing ionic radii among the following isoelectronic species are :
Options
(a) Ca²⁺ > K⁺ > S²⁻ > Cl⁻ (b) Cl⁻ > S²⁻ >Ca²⁺ > K⁺ (c) S²⁻ […]
The solubility of anhydrous AlCl₃ and hydrous AlCl₃ in diethylether are S₁ and S₂ repectively. Then
Options
(a) S₁ = S₂ (b) S₁ > S₂ (c) S₁ < S₂ (d) None of these
If electron has spin quantum number +1/2 and magnetic quantum number -1, it cannot be present in
Options
(a) d-orbital (b) f-orbital (c) p-orbital (d) s-orbital
Correct Answer:
s-orbital
Explanation:
No explanation available. […]
If r is the radius of the first orbit, the radius of nth-orbit of H-atom is given by
Options
(a) rn² (b) rn (c) r/n (d) r² n²
Correct Answer:
rn²
Explanation:
Radius […]
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