Which of the following oxides is amphoteric in character?
Which of the following oxides is amphoteric in character?
Options
(a) Co₂ (b) CaO (c) SiO₂ (d) SnO₂
Correct Answer:
SnO₂
Explanation:
CaO — basic Co₂ — acidic SiO₂ — weakly acidic SnO₂ […]
Questions
In the photo-electron emission,the energy of the emitted electron is
In the photo-electron emission,the energy of the emitted electron is
Options
(a) greater than the incident photon (b) same as than of the incident photon (c) smaller than the incident photon (d) proportional […]
In the periodic table, the element with atomic number 16 will be placed
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.
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
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
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
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
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
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
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