Choose isosteres from the following.
Choose isosteres from the following.
Options
(a) NO₂⁻ and PO₄³⁻ (b) NO₂⁻ and O₃ (c) CO₂,N₂O,NO₃⁻ (d) ClO₄⁻ and OCN⁻
Correct Answer:
NO₂⁻ and O₃
Explanation:
NO₂⁻ and O₃ are isosteres because both […]
Questions
The ionisation energy of nitrogoen is more than that of oxygen because
The ionisation energy of nitrogoen is more than that of oxygen because
Options
(a) nitrogen has half-filled p-orbitals (b) nitrogen is left ot the oxygen in the same period of the periodic table […]
Which of the following does not represent the correct order of the properties
Which of the following does not represent the correct order of the properties indicated
Options
(a) Ni²⁺> Cr²⁺> Fe²⁺> Mn²⁺(size) (b) Sc > Ti > Cr > Mn (size) (c) Mn²⁺ > Ni²⁺ […]
Which of the following represents correct decreasing order of polarity?
Which of the following represents correct decreasing order of polarity?
Options
(a) NH₃ > PH₃ > AsH₃ > SbH₃ (b) NH₃ >SbH₃ > AsH₃ > PH₃ (c) SbH₃ > AsH₃ > PH₃ > […]
Which one of the following ionic species has the greatest proton affinity to form
Which one of the following ionic species has the greatest proton affinity to form stable compound?
Options
(a) NH₂⁻ (b) F⁻ (c) I⁻ (d) HS⁻
Correct Answer:
NH₂⁻
Explanation:
Proton affinity decreases in […]
In which of the folowing pair both the species have sp³ hybridization?
In which of the folowing pair both the species have sp³ hybridization?
Options
(a) H₂S, BF₃ (b) SiF₄, BeH₂ (c) NF₃, H₂O (d) NF₃, BF₃
Correct Answer:
NF₃, H₂O
Explanation:
Applying VSEPR theory, […]
Amongst the elements with following electronic configurations
Amongst the elements with following electronic configurations, which one of them may have the highest ionization energy?
Options
(a) Ne [3s²3p²] (b) Ar [3d¹°4s²4p³] (c) Ne [3s²3p¹] (d) Ne [3s²3p³]
Correct Answer:
Ne […]
The correct sequence of increasing covalent character is represented by
The correct sequence of increasing covalent character is represented by
Options
(a) LiCl < NaCl < BeCl₂ (b) BeCl₂ < LiCl < NaCl (c) NaCl < LiCl < BeCl₂ (d) BeCl₂ < NaCl […]
Na⁺, Mg²⁺, Al³⁺ and Si⁴⁺ are isoelectronic. The order of their ionic size is
Na⁺, Mg²⁺, Al³⁺ and Si⁴⁺ are isoelectronic. The order of their ionic size is
Options
(a) Na⁺>Mg²⁺< Al³⁺Si⁴⁺ (c) Na⁺>Mg²⁺>Al³⁺> Si⁴⁺ (d) Na⁺ Al³⁺Mg²⁺>Al³⁺> Si⁴⁺
Explanation:
Amongst isoelectronic ions, thesize of thecation decreases […]
Which of the following is the smallest in size?
Which of the following is the smallest in size?
Options
(a) Na⁺ (b) F⁻ (c) O²⁻ (d) N³⁻
Correct Answer:
Na⁺
Explanation:
Na⁺ < F⁻ < O²⁻ < N³⁻. All are isoelectronic, effective […]