Which electronic configuration of an element has abnormally high difference between second and third ionization energy ?
Options
(a) I s², 2s², 2p⁶, 3s¹ (b) I s², 2 s², 2 p⁶, 3s¹ 3 […]
What is the dominant inter molecular force or bond that must be overcome in converting liquid CH₃OH to a gas?
Options
(a) Dipole-dipole interaction (b) Covalent bonds (c) London dispersion force (d) Hydrogen […]
One would expect proton to have very large
Options
(a) Charge (b) Ionization potential (c) Hydration energy (d) Radius
Correct Answer:
Hydration energy
Explanation:
Proton (H+) being very small in size wouldhave very […]
Least voltage hydrogen halide is
Options
(a) HF (b) HCl (c) HI (d) HBr
Correct Answer:
HI
Explanation:
As the size of halogen atom increases, the boiling point of hydrogen halides increases. However, […]
A no. of ionic compounds, e.g., AgCl, CaF₂, BaSO₄ are insoluable in water. This is because
Options
(a) ionic compounds do not dissolve in water (b) water has a high dielectric constant (c) […]
Four diatomic species are listed below. Identilfy the correct order in which the bond order is increasing in them:
Options
(a) NO < O₂⁻ < C₂²⁻ < He₂⁺ (b) O₂⁻ < NO < […]
Elements of which of the following groups will form anions most readily ?
Options
(a) Oxygen family (b) Nitrogen family (c) Halogens (d) Alkali metals
Correct Answer:
Halogens
Explanation:
Electron affinity values are […]
Which contains both polar and non-polar covalent bonds?
Options
(a) NH₄Cl (b) H₂O₂ (c) HCN (d) CH₄
Correct Answer:
H₂O₂
Explanation:
In H₂O₂, O–O bond is non-polar while O–H bond is polar.
Which one of the following molecules contains no π bond?
Options
(a) H₂O (b) SO₂ (c) NO₂ (d) CO₂
Correct Answer:
H₂O
Explanation:
All the molecules have O atom with lone pairs, but […]
Which combination is best explained by the coordinate covalent bond?
Options
(a) H⁺ + H₂O (b) Cl + Cl (c) Mg + 1/2 O₂ (d) H₂ + I₂
Correct Answer:
H⁺ + H₂O
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