The element, with atomic number 118, will be
Options
(a) alkali (b) noble gas (c) lanthanide (d) transition element
Correct Answer:
noble gas
Explanation:
Electronic configuration of element with atomic number 118 will […]
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 […]
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 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?
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 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?
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, 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
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
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 […]
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