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?
Options
(a) Na⁺ (b) F⁻ (c) O²⁻ (d) N³⁻
Correct Answer:
Na⁺
Explanation:
Na⁺ < F⁻ < O²⁻ < N³⁻. All are isoelectronic, effective […]
Which of the following sets has strongest tendency to form anions ?
Options
(a) Ga, In, Tl (b) Na, Mg, Al (c) N, O, F (d) V,Cr, Mn
Correct Answer:
N, O, F
Which one of the following ions will be the smallest in size?
Options
(a) Na⁺ (b) Mg²⁺ (c) F⁻ (d) O₂⁻
Correct Answer:
Mg²⁺
Explanation:
Greater is the positive charge on atom, large […]
Which of the following pairs has both members from the same group of periodic table?
Options
(a) Mg-Ba (b) Mg-Cu (c) Mg-K (d) Mg-Na
Correct Answer:
Mg-Ba
Explanation:
Mg—Ba; both belongs to II […]
Alkali metals in each period have
Options
(a) smallest size (b) lower ionisation potential (c) highest ionisation potential (d) highest electronegativity
Correct Answer:
lower ionisation potential
Explanation:
Alkali metals have lowest ionisation potential […]
Which of the following order of element is wrong?
Options
(a) NH₃ < PH₃< AsH₃– Acidic (b) Li < Be < B < C – First IP (c) Al₂O₃< MgO < Na₂O < […]
In the periodic table going down in fluorine group
Options
(a) stability of ohydrides will increase (b) ionic radii will increase (c) electronegativity will increase (d) IE will increase
Correct Answer:
ionic radii […]
Which one of the following is the correct order of size of othe iodine specifies?
Options
(a) I > I⁺ > I⁻ (b) I > I⁻ > I⁺ (c) I⁺ > I⁻ > […]
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 […]
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