JEE Mains · Chemistry · STD 11 - 2. structure of atom
The pair, in which ions are isoelectronic with \(Al ^{3+}\) is ..... .
- A \(Br ^{-}\)and \(Be ^{2+}\)
- B \(Cl ^{-}\)and \(Li ^{+}\)
- C \(S ^{2-}\) and \(K ^{+}\)
- D \(O ^{2-}\) and \(Mg ^{2+}\)
Answer & Solution
Correct Answer
(D) \(O ^{2-}\) and \(Mg ^{2+}\)
Step-by-step Solution
Detailed explanation
Isoelectronic species have same no. of electrons \(Al ^{+3}, O ^{2-}, Mg ^{+2}\) all have \(10\) electrons.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- The total number of hydrogen bonds of a DNA-double Helix strand whose one strand has the following sequence of bases is_______.
\(5^{\prime}\) - G - G-C-A-A-A-T-C-G-G-C-T-A-3'JEE Mains 2025 Easy - The basic structural unit of feldspar, zeolites, mica and asbestos isJEE Mains 2019 Hard
- Given below are two statements :
Statement - I Hybridisation, shape and spin only magnetic moment of \( K_{3}[Co(CO_{3})_{3}] \) is \( sp^{3}d^{2} \), octahedral and 4.9 BM respectively.
Statement - II Geometry, hybridisation and spin only magnetic moment values (BM) of the ions \( [Ni(CN)_{4}]^{2-} \), \( [MnBr_{4}]^{2-} \) and \( [CoF_{6}]^{3-} \) respectively are square planar, tetrahedral, octahedral: \( dsp^{2} \), \( sp^{3} \), \( sp^{3}d^{2} \) and 0, 5.9, 4.9.
In the light of the above statements, choose the correct answer from the options given belowJEE Mains 2026 Easy - For a reaction scheme. \(A\xrightarrow{{{k_1}}}B\xrightarrow{{{k_2}}}C\) if the rate of formation of \(B\) is set to be zero then the concentration of \(B\) is given byJEE Mains 2019 Hard
- A compound with molecular mass \(180\) is acylated with \(CH_3COCl\) to get a compound with molecular mass \(390.\) The number of amino groups present per molecule of the former compound is :JEE Mains 2013 Hard
- Ejection of the photoelectron from metal in the photoelectric effect experiment can be stopped by applying \(0.5\,V\) when the radiation of \(250\, nm\) is used. The work function of the metal is ................ \(\mathrm{eV}\)JEE Mains 2018 Hard
More PYQs from JEE Mains
-
The correct sequence of reagents for the conversion of X to Y is :JEE Mains 2026 Easy - A train starting from rest first accelerates uniformly up to a speed of \(80 \mathrm{~km} / \mathrm{h}\) for time \(t\), then it moves with a constant speed for time 3t. The average speed of the train for this duration of journey will be (in \(\mathrm{km} / \mathrm{h}\) ) _______.JEE Mains 2024 Hard
- Let \(a_1, a_2, a_3, \ldots\) be an A.P. and \(g_1 = a_1, g_2, g_3, \ldots\) be an increasing G.P. If \(a_1 = a_2 + g_2 = 1\) and \(a_3 + g_3 = 4\), then \(a_{10} + g_5\) is equal to:JEE Mains 2026 Medium
- If \(m\) is the minimum value of \(k\) for which the function \(f\left( x \right) = x\sqrt {kx - {x^2}} \) is increasing in the interval \([0,3]\) and \(M\) is the maximum value of \(f\) in \([0, 3]\) when \(k = m\), then the ordered pair \((m, M)\) is equal toJEE Mains 2019 Hard
- In a dilute gas at pressure \(P\) and temperature \(T\), the mean time between successive collisions of a molecule varies with \(T\) asJEE Mains 2020 Medium
- The sum of the first \(20\) terms of the series \(5+11+\) \(19+29+41+\ldots\) is \(..........\).JEE Mains 2023 Hard